ID CVE-2016-0799
Summary The fmtstr function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g improperly calculates string lengths, which allows remote attackers to cause a denial of service (overflow and out-of-bounds read) or possibly have unspecified other impact via a long string, as demonstrated by a large amount of ASN.1 data, a different vulnerability than CVE-2016-2842.
References
Vulnerable Configurations
  • OpenSSL Project OpenSSL 1.0.1
    cpe:2.3:a:openssl:openssl:1.0.1
  • OpenSSL Project OpenSSL 1.0.1 Beta1
    cpe:2.3:a:openssl:openssl:1.0.1:beta1
  • OpenSSL Project OpenSSL 1.0.1 Beta2
    cpe:2.3:a:openssl:openssl:1.0.1:beta2
  • OpenSSL Project OpenSSL 1.0.1 Beta3
    cpe:2.3:a:openssl:openssl:1.0.1:beta3
  • OpenSSL Project OpenSSL 1.0.1a
    cpe:2.3:a:openssl:openssl:1.0.1a
  • OpenSSL Project OpenSSL 1.0.1b
    cpe:2.3:a:openssl:openssl:1.0.1b
  • OpenSSL Project OpenSSL 1.0.1c
    cpe:2.3:a:openssl:openssl:1.0.1c
  • OpenSSL Project OpenSSL 1.0.1d
    cpe:2.3:a:openssl:openssl:1.0.1d
  • OpenSSL Project OpenSSL 1.0.1e
    cpe:2.3:a:openssl:openssl:1.0.1e
  • OpenSSL Project OpenSSL 1.0.1f
    cpe:2.3:a:openssl:openssl:1.0.1f
  • OpenSSL Project OpenSSL 1.0.1g
    cpe:2.3:a:openssl:openssl:1.0.1g
  • OpenSSL Project OpenSSL 1.0.1h
    cpe:2.3:a:openssl:openssl:1.0.1h
  • OpenSSL Project OpenSSL 1.0.1i
    cpe:2.3:a:openssl:openssl:1.0.1i
  • OpenSSL Project OpenSSL 1.0.1j
    cpe:2.3:a:openssl:openssl:1.0.1j
  • OpenSSL Project OpenSSL 1.0.1k
    cpe:2.3:a:openssl:openssl:1.0.1k
  • OpenSSL Project OpenSSL 1.0.1l
    cpe:2.3:a:openssl:openssl:1.0.1l
  • OpenSSL OpenSSL 1.0.1m
    cpe:2.3:a:openssl:openssl:1.0.1m
  • OpenSSL Project OpenSSL 1.0.1n
    cpe:2.3:a:openssl:openssl:1.0.1n
  • OpenSSL Project OpenSSL 1.0.1o
    cpe:2.3:a:openssl:openssl:1.0.1o
  • OpenSSL OpenSSL 1.0.1p
    cpe:2.3:a:openssl:openssl:1.0.1p
  • OpenSSL 1.0.1q
    cpe:2.3:a:openssl:openssl:1.0.1q
  • OpenSSL 1.0.1r
    cpe:2.3:a:openssl:openssl:1.0.1r
  • OpenSSL Project OpenSSL 1.0.2
    cpe:2.3:a:openssl:openssl:1.0.2
  • OpenSSL Project OpenSSL 1.0.2-beta1
    cpe:2.3:a:openssl:openssl:1.0.2:beta1
  • OpenSSL 1.0.2 Beta 2
    cpe:2.3:a:openssl:openssl:1.0.2:beta2
  • OpenSSL 1.0.2 Beta 3
    cpe:2.3:a:openssl:openssl:1.0.2:beta3
  • OpenSSL OpenSSL 1.0.2a
    cpe:2.3:a:openssl:openssl:1.0.2a
  • OpenSSL Project OpenSSL 1.0.2b
    cpe:2.3:a:openssl:openssl:1.0.2b
  • OpenSSL Project OpenSSL 1.0.2c
    cpe:2.3:a:openssl:openssl:1.0.2c
  • OpenSSL OpenSSL 1.0.2d
    cpe:2.3:a:openssl:openssl:1.0.2d
  • OpenSSL 1.0.2e
    cpe:2.3:a:openssl:openssl:1.0.2e
  • OpenSSL 1.0.2f
    cpe:2.3:a:openssl:openssl:1.0.2f
  • Pulse Secure Client for Android
    cpe:2.3:a:pulsesecure:client:-:-:-:-:-:android
  • Pulse Secure Client for iOS
    cpe:2.3:a:pulsesecure:client:-:-:-:-:-:iphone_os
  • Pulse Secure Steel Belted Radius (SBR)
    cpe:2.3:a:pulsesecure:steel_belted_radius
CVSS
Base: 10.0 (as of 28-12-2016 - 09:37)
Impact:
Exploitability:
CWE CWE-119
CAPEC
  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
  • Overflow Binary Resource File
    An attack of this type exploits a buffer overflow vulnerability in the handling of binary resources. Binary resources may include music files like MP3, image files like JPEG files, and any other binary file. These attacks may pass unnoticed to the client machine through normal usage of files, such as a browser loading a seemingly innocent JPEG file. This can allow the attacker access to the execution stack and execute arbitrary code in the target process. This attack pattern is a variant of standard buffer overflow attacks using an unexpected vector (binary files) to wrap its attack and open up a new attack vector. The attacker is required to either directly serve the binary content to the victim, or place it in a locale like a MP3 sharing application, for the victim to download. The attacker then is notified upon the download or otherwise locates the vulnerability opened up by the buffer overflow.
  • Buffer Overflow via Symbolic Links
    This type of attack leverages the use of symbolic links to cause buffer overflows. An attacker can try to create or manipulate a symbolic link file such that its contents result in out of bounds data. When the target software processes the symbolic link file, it could potentially overflow internal buffers with insufficient bounds checking.
  • Overflow Variables and Tags
    This type of attack leverages the use of tags or variables from a formatted configuration data to cause buffer overflow. The attacker crafts a malicious HTML page or configuration file that includes oversized strings, thus causing an overflow.
  • Buffer Overflow via Parameter Expansion
    In this attack, the target software is given input that the attacker knows will be modified and expanded in size during processing. This attack relies on the target software failing to anticipate that the expanded data may exceed some internal limit, thereby creating a buffer overflow.
  • Buffer Overflow in an API Call
    This attack targets libraries or shared code modules which are vulnerable to buffer overflow attacks. An attacker who has access to an API may try to embed malicious code in the API function call and exploit a buffer overflow vulnerability in the function's implementation. All clients that make use of the code library thus become vulnerable by association. This has a very broad effect on security across a system, usually affecting more than one software process.
  • Buffer Overflow in Local Command-Line Utilities
    This attack targets command-line utilities available in a number of shells. An attacker can leverage a vulnerability found in a command-line utility to escalate privilege to root.
Access
VectorComplexityAuthentication
NETWORK LOW NONE
Impact
ConfidentialityIntegrityAvailability
COMPLETE COMPLETE COMPLETE
nessus via4
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2016-563.NASL
    description This update for libopenssl0_9_8 fixes the following issues : - CVE-2016-2105: EVP_EncodeUpdate overflow (bsc#977614) - CVE-2016-2106: EVP_EncryptUpdate overflow (bsc#977615) - CVE-2016-2108: Memory corruption in the ASN.1 encoder (bsc#977617) - CVE-2016-2109: ASN.1 BIO excessive memory allocation (bsc#976942) - CVE-2016-0702: Side channel attack on modular exponentiation 'CacheBleed' (bsc#968050) - bsc#976943: Buffer overrun in ASN1_parse and updates the package to version 0.9.8zh which collects many other fixes, including security ones.
    last seen 2019-02-21
    modified 2016-10-13
    plugin id 91068
    published 2016-05-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91068
    title openSUSE Security Update : libopenssl0_9_8 (openSUSE-2016-563) (DROWN)
  • NASL family F5 Networks Local Security Checks
    NASL id F5_BIGIP_SOL22334603.NASL
    description The fmtstr function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g improperly calculates string lengths, which allows remote attackers to cause a denial of service (overflow and out-of-bounds read) or possibly have unspecified other impact via a long string, as demonstrated by a large amount of ASN.1 data, a different vulnerability than CVE-2016-2842. (CVE-2016-0799)
    last seen 2019-02-21
    modified 2019-01-04
    plugin id 92707
    published 2016-08-04
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92707
    title F5 Networks BIG-IP : OpenSSL vulnerability (K22334603)
  • NASL family F5 Networks Local Security Checks
    NASL id F5_BIGIP_SOL52349521.NASL
    description The doapr_outch function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g does not verify that a certain memory allocation succeeds, which allows remote attackers to cause a denial of service (out-of-bounds write or memory consumption) or possibly have unspecified other impact via a long string, as demonstrated by a large amount of ASN.1 data, a different vulnerability than CVE-2016-0799. (CVE-2016-2842)
    last seen 2019-02-21
    modified 2019-01-04
    plugin id 93201
    published 2016-08-30
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=93201
    title F5 Networks BIG-IP : OpenSSL vulnerability (K52349521)
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2016-0049.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : - fix CVE-2016-2105 - possible overflow in base64 encoding - fix CVE-2016-2106 - possible overflow in EVP_EncryptUpdate - fix CVE-2016-2107 - padding oracle in stitched AES-NI CBC-MAC - fix CVE-2016-2108 - memory corruption in ASN.1 encoder - fix CVE-2016-2109 - possible DoS when reading ASN.1 data from BIO - fix CVE-2016-0799 - memory issues in BIO_printf - fix CVE-2016-0702 - side channel attack on modular exponentiation - fix CVE-2016-0705 - double-free in DSA private key parsing - fix CVE-2016-0797 - heap corruption in BN_hex2bn and BN_dec2bn - fix CVE-2015-3197 - SSLv2 ciphersuite enforcement - disable SSLv2 in the generic TLS method - fix 1-byte memory leak in pkcs12 parse (#1229871) - document some options of the speed command (#1197095) - fix high-precision timestamps in timestamping authority - fix CVE-2015-7575 - disallow use of MD5 in TLS1.2 - fix CVE-2015-3194 - certificate verify crash with missing PSS parameter - fix CVE-2015-3195 - X509_ATTRIBUTE memory leak - fix CVE-2015-3196 - race condition when handling PSK identity hint
    last seen 2019-02-21
    modified 2018-07-24
    plugin id 91154
    published 2016-05-16
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91154
    title OracleVM 3.3 / 3.4 : openssl (OVMSA-2016-0049) (SLOTH)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2016-294.NASL
    description This update for libopenssl0_9_8 fixes the following issues : - CVE-2016-0800 aka the 'DROWN' attack (bsc#968046): OpenSSL was vulnerable to a cross-protocol attack that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. This update changes the openssl library to : - Disable SSLv2 protocol support by default. This can be overridden by setting the environment variable 'OPENSSL_ALLOW_SSL2' or by using SSL_CTX_clear_options using the SSL_OP_NO_SSLv2 flag. Note that various services and clients had already disabled SSL protocol 2 by default previously. - Disable all weak EXPORT ciphers by default. These can be reenabled if required by old legacy software using the environment variable 'OPENSSL_ALLOW_EXPORT'. - CVE-2016-0797 (bnc#968048): The BN_hex2bn() and BN_dec2bn() functions had a bug that could result in an attempt to de-reference a NULL pointer leading to crashes. This could have security consequences if these functions were ever called by user applications with large untrusted hex/decimal data. Also, internal usage of these functions in OpenSSL uses data from config files or application command line arguments. If user developed applications generated config file data based on untrusted data, then this could have had security consequences as well. - CVE-2016-0799 (bnc#968374) On many 64 bit systems, the internal fmtstr() and doapr_outch() functions could miscalculate the length of a string and attempt to access out-of-bounds memory locations. These problems could have enabled attacks where large amounts of untrusted data is passed to the BIO_*printf functions. If applications use these functions in this way then they could have been vulnerable. OpenSSL itself uses these functions when printing out human-readable dumps of ASN.1 data. Therefore applications that print this data could have been vulnerable if the data is from untrusted sources. OpenSSL command line applications could also have been vulnerable when they print out ASN.1 data, or if untrusted data is passed as command line arguments. Libssl is not considered directly vulnerable. - The package was updated to 0.9.8zh : - fixes many security vulnerabilities (not separately listed): CVE-2015-3195, CVE-2015-1788, CVE-2015-1789, CVE-2015-1790, CVE-2015-1792, CVE-2015-1791, CVE-2015-0286, CVE-2015-0287, CVE-2015-0289, CVE-2015-0293, CVE-2015-0209, CVE-2015-0288, CVE-2014-3571, CVE-2014-3569, CVE-2014-3572, CVE-2015-0204, CVE-2014-8275, CVE-2014-3570, CVE-2014-3567, CVE-2014-3568, CVE-2014-3566, CVE-2014-3510, CVE-2014-3507, CVE-2014-3506, CVE-2014-3505, CVE-2014-3508, CVE-2014-0224, CVE-2014-0221, CVE-2014-0195, CVE-2014-3470, CVE-2014-0076, CVE-2013-0169, CVE-2013-0166 - avoid running OPENSSL_config twice. This avoids breaking engine loading. (boo#952871, boo#967787) - fix CVE-2015-3197 (boo#963415) - SSLv2 doesn't block disabled ciphers
    last seen 2019-02-21
    modified 2016-12-07
    plugin id 89651
    published 2016-03-04
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89651
    title openSUSE Security Update : libopenssl0_9_8 (openSUSE-2016-294) (DROWN) (FREAK) (POODLE)
  • NASL family Misc.
    NASL id ORACLE_SECURE_GLOBAL_DESKTOP_JUL_2016_CPU.NASL
    description The version of Oracle Secure Global Desktop installed on the remote host is 4.63, 4.71, or 5.2 and is missing a security patch from the July 2016 Critical Patch Update (CPU). It is, therefore, affected by the following vulnerabilities : - An integer overflow condition exists in the X Server subcomponent in the read_packet() function due to improper validation of user-supplied input when calculating the amount of memory required to handle returned data. A remote attacker can exploit this to cause a denial of service condition or the execution of arbitrary code. Note that this vulnerability only affects versions 4.71 and 5.2. (CVE-2013-2064) - A carry propagating flaw exists in the OpenSSL subcomponent in the x86_64 Montgomery squaring implementation that may cause the BN_mod_exp() function to produce incorrect results. An attacker can exploit this to obtain sensitive information regarding private keys. (CVE-2015-3193) - A NULL pointer dereference flaw exists in the OpenSSL subcomponent in file rsa_ameth.c when handling ASN.1 signatures that use the RSA PSS algorithm but are missing a mask generation function parameter. A remote attacker can exploit this to cause the signature verification routine to crash, leading to a denial of service. (CVE-2015-3194) - A key disclosure vulnerability exists in the OpenSSL subcomponent due to improper handling of cache-bank conflicts on the Intel Sandy-bridge microarchitecture. An attacker can exploit this to gain access to RSA key information. (CVE-2016-0702) - A NULL pointer dereference flaw exists in the OpenSSL subcomponent in the BN_hex2bn() and BN_dec2bn() functions. A remote attacker can exploit this to trigger a heap corruption, resulting in the execution of arbitrary code. (CVE-2016-0797) - Multiple memory corruption issues exist in the OpenSSL subcomponent that allow a remote attacker to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-0799) - A heap buffer overflow condition exists in the OpenSSL subcomponent in the EVP_EncodeUpdate() function within file crypto/evp/encode.c that is triggered when handling a large amount of input data. An unauthenticated, remote attacker can exploit this to cause a denial of service condition. (CVE-2016-2105) - Multiple flaws exist in the OpenSSL subcomponent in the aesni_cbc_hmac_sha1_cipher() function in file crypto/evp/e_aes_cbc_hmac_sha1.c and the aesni_cbc_hmac_sha256_cipher() function in file crypto/evp/e_aes_cbc_hmac_sha256.c that are triggered when the connection uses an AES-CBC cipher and AES-NI is supported by the server. A man-in-the-middle attacker can exploit these to conduct a padding oracle attack, resulting in the ability to decrypt the network traffic. (CVE-2016-2107) - An unspecified flaw exists in the OpenSSL subcomponent that allows a remote attacker to execute arbitrary code. (CVE-2016-3613)
    last seen 2019-02-21
    modified 2018-07-18
    plugin id 92543
    published 2016-07-25
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92543
    title Oracle Secure Global Desktop Multiple Vulnerabilities (July 2016 CPU)
  • NASL family Junos Local Security Checks
    NASL id JUNIPER_JSA10759.NASL
    description According to its self-reported version number, the remote Juniper Junos device is affected by the following vulnerabilities related to OpenSSL : - A flaw exists in the ssl3_get_key_exchange() function in file s3_clnt.c when handling a ServerKeyExchange message for an anonymous DH ciphersuite with the value of 'p' set to 0. A attacker can exploit this, by causing a segmentation fault, to crash an application linked against the library, resulting in a denial of service. (CVE-2015-1794) - A carry propagating flaw exists in the x86_64 Montgomery squaring implementation that may cause the BN_mod_exp() function to produce incorrect results. An attacker can exploit this to obtain sensitive information regarding private keys. (CVE-2015-3193) - A NULL pointer dereference flaw exists in file rsa_ameth.c due to improper handling of ASN.1 signatures that are missing the PSS parameter. A remote attacker can exploit this to cause the signature verification routine to crash, resulting in a denial of service condition. (CVE-2015-3194) - A flaw exists in the ASN1_TFLG_COMBINE implementation in file tasn_dec.c related to handling malformed X509_ATTRIBUTE structures. A remote attacker can exploit this to cause a memory leak by triggering a decoding failure in a PKCS#7 or CMS application, resulting in a denial of service. (CVE-2015-3195) - A race condition exists in s3_clnt.c that is triggered when PSK identity hints are incorrectly updated in the parent SSL_CTX structure when they are received by a multi-threaded client. A remote attacker can exploit this, via a crafted ServerKeyExchange message, to cause a double-free memory error, resulting in a denial of service. (CVE-2015-3196) - A cipher algorithm downgrade vulnerability exists due to a flaw that is triggered when handling cipher negotiation. A remote attacker can exploit this to negotiate SSLv2 ciphers and complete SSLv2 handshakes even if all SSLv2 ciphers have been disabled on the server. Note that this vulnerability only exists if the SSL_OP_NO_SSLv2 option has not been disabled. (CVE-2015-3197) - A key disclosure vulnerability exists due to improper handling of cache-bank conflicts on the Intel Sandy-bridge microarchitecture. An attacker can exploit this to gain access to RSA key information. (CVE-2016-0702) - A flaw exists in the SSLv2 implementation, specifically in the get_client_master_key() function within file s2_srvr.c, due to accepting a nonzero CLIENT-MASTER-KEY CLEAR-KEY-LENGTH value for an arbitrary cipher. A man-in-the-middle attacker can exploit this to determine the MASTER-KEY value and decrypt TLS ciphertext by leveraging a Bleichenbacher RSA padding oracle. (CVE-2016-0703) - A flaw exists in the SSLv2 oracle protection mechanism, specifically in the get_client_master_key() function within file s2_srvr.c, due to incorrectly overwriting MASTER-KEY bytes during use of export cipher suites. A remote attackers can exploit this to more easily decrypt TLS ciphertext by leveraging a Bleichenbacher RSA padding oracle. (CVE-2016-0704) - A double-free error exists due to improper validation of user-supplied input when parsing malformed DSA private keys. A remote attacker can exploit this to corrupt memory, resulting in a denial of service condition or the execution of arbitrary code. (CVE-2016-0705) - A NULL pointer dereference flaw exists in the BN_hex2bn() and BN_dec2bn() functions. A remote attacker can exploit this to trigger a heap corruption, resulting in the execution of arbitrary code. (CVE-2016-0797) - A denial of service vulnerability exists due to improper handling of invalid usernames. A remote attacker can exploit this, via a specially crafted username, to leak 300 bytes of memory per connection, exhausting available memory resources. (CVE-2016-0798) - Multiple memory corruption issues exist that allow a remote attacker to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-0799) - A heap buffer overflow condition exists in the EVP_EncodeUpdate() function within file crypto/evp/encode.c that is triggered when handling a large amount of input data. An unauthenticated, remote attacker can exploit this to cause a denial of service condition. (CVE-2016-2105) - A heap buffer overflow condition exists in the EVP_EncryptUpdate() function within file crypto/evp/evp_enc.c that is triggered when handling a large amount of input data after a previous call occurs to the same function with a partial block. An unauthenticated, remote attacker can exploit this to cause a denial of service condition. (CVE-2016-2106) - A remote code execution vulnerability exists in the ASN.1 encoder due to an underflow condition that occurs when attempting to encode the value zero represented as a negative integer. An unauthenticated, remote attacker can exploit this to corrupt memory, resulting in the execution of arbitrary code. (CVE-2016-2108) - Multiple unspecified flaws exist in the d2i BIO functions when reading ASN.1 data from a BIO due to invalid encoding causing a large allocation of memory. An unauthenticated, remote attacker can exploit these to cause a denial of service condition through resource exhaustion. (CVE-2016-2109) - Multiple integer overflow conditions exist in s3_srvr.c, ssl_sess.c, and t1_lib.c due to improper use of pointer arithmetic for heap-buffer boundary checks. An unauthenticated, remote attacker can exploit this to cause a denial of service. (CVE-2016-2177) - An information disclosure vulnerability exists in the dsa_sign_setup() function in dsa_ossl.c due to a failure to properly ensure the use of constant-time operations. An unauthenticated, remote attacker can exploit this, via a timing side-channel attack, to disclose DSA key information. (CVE-2016-2178) - An out-of-bounds read error exists in the X.509 Public Key Infrastructure Time-Stamp Protocol (TSP) implementation. An unauthenticated, remote attacker can exploit this, via a crafted time-stamp file that is mishandled by the 'openssl ts' command, to cause denial of service or to disclose sensitive information. (CVE-2016-2180) - An overflow condition exists in the BN_bn2dec() function in bn_print.c due to improper validation of user-supplied input when handling BIGNUM values. An unauthenticated, remote attacker can exploit this to crash the process. (CVE-2016-2182) - A vulnerability exists, known as SWEET32, in the 3DES and Blowfish algorithms due to the use of weak 64-bit block ciphers by default. A man-in-the-middle attacker who has sufficient resources can exploit this vulnerability, via a 'birthday' attack, to detect a collision that leaks the XOR between the fixed secret and a known plaintext, allowing the disclosure of the secret text, such as secure HTTPS cookies, and possibly resulting in the hijacking of an authenticated session. (CVE-2016-2183) - A flaw exists in the tls_decrypt_ticket() function in t1_lib.c due to improper handling of ticket HMAC digests. An unauthenticated, remote attacker can exploit this, via a ticket that is too short, to crash the process, resulting in a denial of service. (CVE-2016-6302) - An integer overflow condition exists in the MDC2_Update() function in mdc2dgst.c due to improper validation of user-supplied input. An unauthenticated, remote attacker can exploit this to cause a heap-based buffer overflow, resulting in a denial of service condition or possibly the execution of arbitrary code. (CVE-2016-6303) - A flaw exists in the ssl_parse_clienthello_tlsext() function in t1_lib.c due to improper handling of overly large OCSP Status Request extensions from clients. An unauthenticated, remote attacker can exploit this, via large OCSP Status Request extensions, to exhaust memory resources, resulting in a denial of service condition. (CVE-2016-6304) - A flaw exists in the SSL_peek() function in rec_layer_s3.c due to improper handling of empty records. An unauthenticated, remote attacker can exploit this, by triggering a zero-length record in an SSL_peek call, to cause an infinite loop, resulting in a denial of service condition. (CVE-2016-6305) - An out-of-bounds read error exists in the certificate parser that allows an unauthenticated, remote attacker to cause a denial of service via crafted certificate operations. (CVE-2016-6306) - A denial of service vulnerability exists in the state-machine implementation due to a failure to check for an excessive length before allocating memory. An unauthenticated, remote attacker can exploit this, via a crafted TLS message, to exhaust memory resources. (CVE-2016-6307) Note that these issues only affects devices with J-Web or the SSL service for JUNOScript enabled.
    last seen 2019-02-21
    modified 2018-08-10
    plugin id 96316
    published 2017-01-05
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=96316
    title Juniper Junos Multiple OpenSSL Vulnerabilities (JSA10759) (SWEET32)
  • NASL family Databases
    NASL id MYSQL_5_7_12.NASL
    description The version of MySQL running on the remote host is 5.7.x prior to 5.7.12. It is, therefore, affected by multiple vulnerabilities : - A cipher algorithm downgrade vulnerability exists in the bundled version of OpenSSL due to a flaw that is triggered when handling cipher negotiation. A remote attacker can exploit this to negotiate SSLv2 ciphers and complete SSLv2 handshakes even if all SSLv2 ciphers have been disabled on the server. Note that this vulnerability only exists if the SSL_OP_NO_SSLv2 option has not been disabled. (CVE-2015-3197) - An unspecified flaw exists in the Pluggable Authentication subcomponent that allows an unauthenticated, remote attacker to execute arbitrary code. (CVE-2016-0639) - An unspecified flaw exists in the Federated subcomponent that allows an authenticated, remote attacker to impact integrity and availability. (CVE-2016-0642) - An unspecified flaw exists in the DML subcomponent that allows an authenticated, remote attacker to disclose sensitive information. (CVE-2016-0643) - An unspecified flaw exists in the FTS subcomponent that allows an authenticated, remote attacker to cause a denial of service condition. (CVE-2016-0647) - An unspecified flaw exists in the PS subcomponent that allows an authenticated, remote attacker to cause a denial of service condition. (CVE-2016-0647) - An unspecified flaw exists in the InnoDB subcomponent that allows an authenticated, remote attacker to cause a denial of service condition. (CVE-2016-0655) - An unspecified flaw exists in the JSON subcomponent that allows an authenticated, remote attacker to disclose sensitive information. (CVE-2016-0657) - An unspecified flaw exists in the Optimizer subcomponent that allows an authenticated, remote attacker to cause a denial of service condition. (CVE-2016-0659) - An unspecified flaw exists in the Partition subcomponent that allows an authenticated, remote attacker to cause a denial of service condition. (CVE-2016-0662) - An unspecified flaw exists in the Security: Privileges subcomponent that allows an authenticated, remote attacker to cause a denial of service condition. (CVE-2016-0666) - An unspecified flaw exists in the Locking subcomponent that allows an authenticated, remote attacker to cause a denial of service condition. (CVE-2016-0667) - A key disclosure vulnerability exists in the bundled version of OpenSSL due to improper handling of cache-bank conflicts on the Intel Sandy-bridge microarchitecture. An attacker can exploit this to gain access to RSA key information. (CVE-2016-0702) - A double-free error exists in the bundled version of OpenSSL due to improper validation of user-supplied input when parsing malformed DSA private keys. A remote attacker can exploit this to corrupt memory, resulting in a denial of service condition or the execution of arbitrary code. (CVE-2016-0705) - A NULL pointer dereference flaw exists in the bundled version of OpenSSL in the BN_hex2bn() and BN_dec2bn() functions. A remote attacker can exploit this to trigger a heap corruption, resulting in the execution of arbitrary code. (CVE-2016-0797) - A denial of service vulnerability exists in the bundled version of OpenSSL due to improper handling of invalid usernames. A remote attacker can exploit this, via a specially crafted username, to leak 300 bytes of memory per connection, exhausting available memory resources. (CVE-2016-0798) - Multiple memory corruption issues exist in the bundled version of OpenSSL that allow a remote attacker to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-0799) - A flaw exists in the bundled version of OpenSSL that allows a cross-protocol Bleichenbacher padding oracle attack known as DROWN (Decrypting RSA with Obsolete and Weakened eNcryption). This vulnerability exists due to a flaw in the Secure Sockets Layer Version 2 (SSLv2) implementation, and it allows captured TLS traffic to be decrypted. A man-in-the-middle attacker can exploit this to decrypt the TLS connection by utilizing previously captured traffic and weak cryptography along with a series of specially crafted connections to an SSLv2 server that uses the same private key. (CVE-2016-0800) - A man-in-the-middle spoofing vulnerability exists due to the server hostname not being verified to match a domain name in the Subject's Common Name (CN) or SubjectAltName field of the X.509 certificate. A man-in-the-middle attacker can exploit this, by spoofing the TLS/SSL server via a certificate that appears valid, to disclose sensitive information or manipulate transmitted data. (CVE-2016-2047) - An unspecified flaw exists in the Optimizer subcomponent that allow an authenticated, remote attacker to cause a denial of service condition. (CVE-2017-10378) - A flaw exists related to certificate validation due to the server hostname not being verified to match a domain name in the X.509 certificate. A man-in-the-middle attacker can exploit this, by spoofing the TLS/SSL server via a certificate that appears valid, to disclose sensitive information or manipulate data. - An integer overflow condition exists that is triggered due to improper validation of user-supplied input when processing client handshakes. An authenticated, remote attacker can exploit this to cause the server to exit, resulting in a denial of service condition. - An information disclosure vulnerability exists due to overly verbose error messages returning part of the SQL statement that produced them. An authenticated, remote attacker can exploit this to disclose sensitive information. - A flaw exists in InnoDB that is triggered during the handling of an ALTER TABLE or ADD COLUMN operation on a table with virtual columns. An authenticated, remote attacker can exploit this to crash the server, resulting in a denial of service condition.
    last seen 2019-02-21
    modified 2019-01-02
    plugin id 90684
    published 2016-04-22
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=90684
    title MySQL 5.7.x < 5.7.12 Multiple Vulnerabilities (DROWN)
  • NASL family Firewalls
    NASL id PFSENSE_SA-16_02.NASL
    description According to its self-reported version number, the remote pfSense install is prior to 2.3. It is, therefore, affected by multiple vulnerabilities.
    last seen 2019-02-21
    modified 2018-09-17
    plugin id 106499
    published 2018-01-31
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=106499
    title pfSense < 2.3 Multiple Vulnerabilities (SA-16_01 - SA-16_02)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-0631-1.NASL
    description This update for compat-openssl097g fixes the following issues : - CVE-2016-0800 aka the 'DROWN' attack (bsc#968046): OpenSSL was vulnerable to a cross-protocol attack that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. This update changes the openssl library to : - Disable SSLv2 protocol support by default. This can be overridden by setting the environment variable 'OPENSSL_ALLOW_SSL2' or by using SSL_CTX_clear_options using the SSL_OP_NO_SSLv2 flag. Note that various services and clients had already disabled SSL protocol 2 by default previously. - Disable all weak EXPORT ciphers by default. These can be reenabled if required by old legacy software using the environment variable 'OPENSSL_ALLOW_EXPORT'. - CVE-2016-0705 (bnc#968047): A double free() bug in the DSA ASN1 parser code was fixed that could be abused to facilitate a denial-of-service attack. - CVE-2016-0797 (bnc#968048): The BN_hex2bn() and BN_dec2bn() functions had a bug that could result in an attempt to de-reference a NULL pointer leading to crashes. This could have security consequences if these functions were ever called by user applications with large untrusted hex/decimal data. Also, internal usage of these functions in OpenSSL uses data from config files or application command line arguments. If user developed applications generated config file data based on untrusted data, then this could have had security consequences as well. - CVE-2016-0799 (bnc#968374) On many 64 bit systems, the internal fmtstr() and doapr_outch() functions could miscalculate the length of a string and attempt to access out-of-bounds memory locations. These problems could have enabled attacks where large amounts of untrusted data is passed to the BIO_*printf functions. If applications use these functions in this way then they could have been vulnerable. OpenSSL itself uses these functions when printing out human-readable dumps of ASN.1 data. Therefore applications that print this data could have been vulnerable if the data is from untrusted sources. OpenSSL command line applications could also have been vulnerable when they print out ASN.1 data, or if untrusted data is passed as command line arguments. Libssl is not considered directly vulnerable. - CVE-2016-0800 aka the 'DROWN' attack (bsc#968046): OpenSSL was vulnerable to a cross-protocol attack that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. This update changes the openssl library to : - Disable SSLv2 protocol support by default. This can be overridden by setting the environment variable 'OPENSSL_ALLOW_SSL2' or by using SSL_CTX_clear_options using the SSL_OP_NO_SSLv2 flag. Note that various services and clients had already disabled SSL protocol 2 by default previously. - Disable all weak EXPORT ciphers by default. These can be reenabled if required by old legacy software using the environment variable 'OPENSSL_ALLOW_EXPORT'. - CVE-2016-0705 (bnc#968047): A double free() bug in the DSA ASN1 parser code was fixed that could be abused to facilitate a denial-of-service attack. - CVE-2016-0797 (bnc#968048): The BN_hex2bn() and BN_dec2bn() functions had a bug that could result in an attempt to de-reference a NULL pointer leading to crashes. This could have security consequences if these functions were ever called by user applications with large untrusted hex/decimal data. Also, internal usage of these functions in OpenSSL uses data from config files or application command line arguments. If user developed applications generated config file data based on untrusted data, then this could have had security consequences as well. - CVE-2016-0799 (bnc#968374) On many 64 bit systems, the internal fmtstr() and doapr_outch() functions could miscalculate the length of a string and attempt to access out-of-bounds memory locations. These problems could have enabled attacks where large amounts of untrusted data is passed to the BIO_*printf functions. If applications use these functions in this way then they could have been vulnerable. OpenSSL itself uses these functions when printing out human-readable dumps of ASN.1 data. Therefore applications that print this data could have been vulnerable if the data is from untrusted sources. OpenSSL command line applications could also have been vulnerable when they print out ASN.1 data, or if untrusted data is passed as command line arguments. Libssl is not considered directly vulnerable. - CVE-2015-3197 (bsc#963415): The SSLv2 protocol did not block disabled ciphers. Note that the March 1st 2016 release also references following CVEs that were fixed by us with CVE-2015-0293 in 2015 : - CVE-2016-0703 (bsc#968051): This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. - CVE-2016-0704 (bsc#968053): 'Bleichenbacher oracle in SSLv2' This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-11-29
    plugin id 89722
    published 2016-03-07
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89722
    title SUSE SLED11 Security Update : compat-openssl097g (SUSE-SU-2016:0631-1) (DROWN)
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2016-0135.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : - fix CVE-2016-2177 - possible integer overflow - fix CVE-2016-2178 - non-constant time DSA operations - fix CVE-2016-2179 - further DoS issues in DTLS - fix CVE-2016-2180 - OOB read in TS_OBJ_print_bio - fix CVE-2016-2181 - DTLS1 replay protection and unprocessed records issue - fix CVE-2016-2182 - possible buffer overflow in BN_bn2dec - fix CVE-2016-6302 - insufficient TLS session ticket HMAC length check - fix CVE-2016-6304 - unbound memory growth with OCSP status request - fix CVE-2016-6306 - certificate message OOB reads - mitigate CVE-2016-2183 - degrade all 64bit block ciphers and RC4 to 112 bit effective strength - replace expired testing certificates - fix CVE-2016-2105 - possible overflow in base64 encoding - fix CVE-2016-2106 - possible overflow in EVP_EncryptUpdate - fix CVE-2016-2107 - padding oracle in stitched AES-NI CBC-MAC - fix CVE-2016-2108 - memory corruption in ASN.1 encoder - fix CVE-2016-2109 - possible DoS when reading ASN.1 data from BIO - fix CVE-2016-0799 - memory issues in BIO_printf
    last seen 2019-02-21
    modified 2018-07-24
    plugin id 93761
    published 2016-09-28
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=93761
    title OracleVM 3.3 / 3.4 : openssl (OVMSA-2016-0135)
  • NASL family Databases
    NASL id MYSQL_5_7_12_RPM.NASL
    description The version of Oracle MySQL installed on the remote host is 5.7.x prior to 5.7.12. It is, therefore, affected by the following vulnerabilities : - A cipher algorithm downgrade vulnerability exists in the bundled version of OpenSSL due to a flaw that is triggered when handling cipher negotiation. A remote attacker can exploit this to negotiate SSLv2 ciphers and complete SSLv2 handshakes even if all SSLv2 ciphers have been disabled on the server. Note that this vulnerability only exists if the SSL_OP_NO_SSLv2 option has not been disabled. (CVE-2015-3197) - An unspecified flaw exists in the Pluggable Authentication subcomponent that allows an unauthenticated, remote attacker to execute arbitrary code. (CVE-2016-0639) - An unspecified flaw exists in the Federated subcomponent that allows a local attacker to impact integrity and availability. (CVE-2016-0642) - An unspecified flaw exists in the DML subcomponent that allows a local attacker to disclose potentially sensitive information. (CVE-2016-0643) - An unspecified flaw exists in the FTS subcomponent that allows a local attacker to cause a denial of service condition. (CVE-2016-0647) - An unspecified flaw exists in the PS subcomponent that allows a local attacker to cause a denial of service condition. (CVE-2016-0648) - An unspecified flaw exists in the InnoDB subcomponent that allows a local attacker to cause a denial of service condition. (CVE-2016-0655) - An unspecified flaw exists in the JSON subcomponent that allows a local attacker to disclose potentially sensitive information. (CVE-2016-0657) - An unspecified flaw exists in the Optimizer subcomponent that allows a local attacker to cause a denial of service condition. (CVE-2016-0659) - An unspecified flaw exists in the Partition subcomponent that allows a local attacker to cause a denial of service condition. (CVE-2016-0662) - An unspecified flaw exists in the Security: Privileges subcomponent that allows a local attacker to cause a denial of service condition. (CVE-2016-0666) - An unspecified flaw exists in the Locking subcomponent that allows a local attacker to cause a denial of service condition. (CVE-2016-0667) - A key disclosure vulnerability exists in the bundled version of OpenSSL due to improper handling of cache-bank conflicts on the Intel Sandy-bridge microarchitecture. An attacker can exploit this to gain access to RSA key information. (CVE-2016-0702) - A double-free error exists in the bundled version of OpenSSL due to improper validation of user-supplied input when parsing malformed DSA private keys. A remote attacker can exploit this to corrupt memory, resulting in a denial of service condition or the execution of arbitrary code. (CVE-2016-0705) - A NULL pointer dereference flaw exists in the bundled version of OpenSSL in the BN_hex2bn() and BN_dec2bn() functions. A remote attacker can exploit this to trigger a heap corruption, resulting in the execution of arbitrary code. (CVE-2016-0797) - A denial of service vulnerability exists in the bundled version of OpenSSL due to improper handling of invalid usernames. A remote attacker can exploit this, via a specially crafted username, to leak 300 bytes of memory per connection, exhausting available memory resources. (CVE-2016-0798) - Multiple memory corruption issues exist in the bundled version of OpenSSL that allow a remote attacker to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-0799) - A flaw exists in the bundled version of OpenSSL that allows a cross-protocol Bleichenbacher padding oracle attack known as DROWN (Decrypting RSA with Obsolete and Weakened eNcryption). This vulnerability exists due to a flaw in the Secure Sockets Layer Version 2 (SSLv2) implementation, and it allows captured TLS traffic to be decrypted. A man-in-the-middle attacker can exploit this to decrypt the TLS connection by utilizing previously captured traffic and weak cryptography along with a series of specially crafted connections to an SSLv2 server that uses the same private key. (CVE-2016-0800) - A man-in-the-middle spoofing vulnerability exists due to the server hostname not being verified to match a domain name in the Subject's Common Name (CN) or SubjectAltName field of the X.509 certificate. A man-in-the-middle attacker can exploit this, by spoofing the TLS/SSL server via a certificate that appears valid, to disclose sensitive information or manipulate transmitted data. (CVE-2016-2047) - An unspecified flaw exists in the Optimizer subcomponent that allow an authenticated, remote attacker to cause a denial of service condition. (CVE-2016-3440, CVE-2017-10378) - An unspecified flaw exists in the Connection subcomponent that allows an unauthenticated, remote attacker to disclose potentially sensitive information. (CVE-2016-5444) Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
    last seen 2019-02-21
    modified 2018-11-15
    plugin id 90834
    published 2016-05-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=90834
    title Oracle MySQL 5.7.x < 5.7.12 Multiple Vulnerabilities (RPM Check) (April 2016 CPU) (July 2016 CPU) (October 2017 CPU) (DROWN)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-0641-1.NASL
    description This update for compat-openssl098 fixes various security issues and bugs : Security issues fixed : - CVE-2016-0800 aka the 'DROWN' attack (bsc#968046): OpenSSL was vulnerable to a cross-protocol attack that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. This update changes the openssl library to : - Disable SSLv2 protocol support by default. This can be overridden by setting the environment variable 'OPENSSL_ALLOW_SSL2' or by using SSL_CTX_clear_options using the SSL_OP_NO_SSLv2 flag. Note that various services and clients had already disabled SSL protocol 2 by default previously. - Disable all weak EXPORT ciphers by default. These can be reenabled if required by old legacy software using the environment variable 'OPENSSL_ALLOW_EXPORT'. - CVE-2016-0797 (bnc#968048): The BN_hex2bn() and BN_dec2bn() functions had a bug that could result in an attempt to de-reference a NULL pointer leading to crashes. This could have security consequences if these functions were ever called by user applications with large untrusted hex/decimal data. Also, internal usage of these functions in OpenSSL uses data from config files or application command line arguments. If user developed applications generated config file data based on untrusted data, then this could have had security consequences as well. - CVE-2016-0799 (bnc#968374) On many 64 bit systems, the internal fmtstr() and doapr_outch() functions could miscalculate the length of a string and attempt to access out-of-bounds memory locations. These problems could have enabled attacks where large amounts of untrusted data is passed to the BIO_*printf functions. If applications use these functions in this way then they could have been vulnerable. OpenSSL itself uses these functions when printing out human-readable dumps of ASN.1 data. Therefore applications that print this data could have been vulnerable if the data is from untrusted sources. OpenSSL command line applications could also have been vulnerable when they print out ASN.1 data, or if untrusted data is passed as command line arguments. Libssl is not considered directly vulnerable. - CVE-2015-3197 (bsc#963415): The SSLv2 protocol did not block disabled ciphers. Note that the March 1st 2016 release also references following CVEs that were fixed by us with CVE-2015-0293 in 2015 : - CVE-2016-0703 (bsc#968051): This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. - CVE-2016-0704 (bsc#968053): 'Bleichenbacher oracle in SSLv2' This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. Also fixes the following bug : - Avoid running OPENSSL_config twice. This avoids breaking engine loading and also fixes a memory leak in libssl. (bsc#952871) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2019-01-02
    plugin id 89658
    published 2016-03-04
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89658
    title SUSE SLED12 / SLES12 Security Update : openssl (SUSE-SU-2016:0641-1) (DROWN)
  • NASL family FreeBSD Local Security Checks
    NASL id FREEBSD_PKG_7B1A4A27600A11E6A6C314DAE9D210B8.NASL
    description A cross-protocol attack was discovered that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. Note that traffic between clients and non-vulnerable servers can be decrypted provided another server supporting SSLv2 and EXPORT ciphers (even with a different protocol such as SMTP, IMAP or POP3) shares the RSA keys of the non-vulnerable server. This vulnerability is known as DROWN. [CVE-2016-0800] A double free bug was discovered when OpenSSL parses malformed DSA private keys and could lead to a DoS attack or memory corruption for applications that receive DSA private keys from untrusted sources. This scenario is considered rare. [CVE-2016-0705] The SRP user database lookup method SRP_VBASE_get_by_user had confusing memory management semantics; the returned pointer was sometimes newly allocated, and sometimes owned by the callee. The calling code has no way of distinguishing these two cases. [CVE-2016-0798] In the BN_hex2bn function, the number of hex digits is calculated using an int value |i|. Later |bn_expand| is called with a value of |i * 4|. For large values of |i| this can result in |bn_expand| not allocating any memory because |i * 4| is negative. This can leave the internal BIGNUM data field as NULL leading to a subsequent NULL pointer dereference. For very large values of |i|, the calculation |i * 4| could be a positive value smaller than |i|. In this case memory is allocated to the internal BIGNUM data field, but it is insufficiently sized leading to heap corruption. A similar issue exists in BN_dec2bn. This could have security consequences if BN_hex2bn/BN_dec2bn is ever called by user applications with very large untrusted hex/dec data. This is anticipated to be a rare occurrence. [CVE-2016-0797] The internal |fmtstr| function used in processing a '%s' formatted string in the BIO_*printf functions could overflow while calculating the length of a string and cause an out-of-bounds read when printing very long strings. [CVE-2016-0799] A side-channel attack was found which makes use of cache-bank conflicts on the Intel Sandy-Bridge microarchitecture which could lead to the recovery of RSA keys. [CVE-2016-0702] s2_srvr.c did not enforce that clear-key-length is 0 for non-export ciphers. If clear-key bytes are present for these ciphers, they displace encrypted-key bytes. [CVE-2016-0703] s2_srvr.c overwrites the wrong bytes in the master key when applying Bleichenbacher protection for export cipher suites. [CVE-2016-0704] Impact : Servers that have SSLv2 protocol enabled are vulnerable to the 'DROWN' attack which allows a remote attacker to fast attack many recorded TLS connections made to the server, even when the client did not make any SSLv2 connections themselves. An attacker who can supply malformed DSA private keys to OpenSSL applications may be able to cause memory corruption which would lead to a Denial of Service condition. [CVE-2016-0705] An attacker connecting with an invalid username can cause memory leak, which could eventually lead to a Denial of Service condition. [CVE-2016-0798] An attacker who can inject malformed data into an application may be able to cause memory corruption which would lead to a Denial of Service condition. [CVE-2016-0797, CVE-2016-0799] A local attacker who has control of code in a thread running on the same hyper-threaded core as the victim thread which is performing decryptions could recover RSA keys. [CVE-2016-0702] An eavesdropper who can intercept SSLv2 handshake can conduct an efficient divide-and-conquer key recovery attack and use the server as an oracle to determine the SSLv2 master-key, using only 16 connections to the server and negligible computation. [CVE-2016-0703] An attacker can use the Bleichenbacher oracle, which enables more efficient variant of the DROWN attack. [CVE-2016-0704]
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 92921
    published 2016-08-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92921
    title FreeBSD : FreeBSD -- Multiple OpenSSL vulnerabilities (7b1a4a27-600a-11e6-a6c3-14dae9d210b8) (DROWN)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2016-E1234B65A2.NASL
    description Update to latest openssl which fixes various CVE's Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2016-10-18
    plugin id 92185
    published 2016-07-14
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92185
    title Fedora 23 : mingw-openssl (2016-e1234b65a2)
  • NASL family Web Servers
    NASL id HPSMH_7_5_5.NASL
    description According to its banner, the version of HP System Management Homepage (SMH) hosted on the remote web server is affected by the following vulnerabilities : - A denial of service vulnerability exists in the Apache HTTP Server due to the lack of the mod_reqtimeout module. An unauthenticated, remote attacker can exploit this, via a saturation of partial HTTP requests, to cause a daemon outage. (CVE-2007-6750) - A cross-site scripting (XSS) vulnerability exists in jQuery when using location.hash to select elements. An unauthenticated, remote attacker can exploit this, via a specially crafted tag, to inject arbitrary script code or HTML into the user's browser session. (CVE-2011-4969) - A NULL pointer dereference flaw exists in file rsa_ameth.c due to improper handling of ASN.1 signatures that are missing the PSS parameter. A remote attacker can exploit this to cause the signature verification routine to crash, resulting in a denial of service condition. (CVE-2015-3194) - A flaw exists in the ASN1_TFLG_COMBINE implementation in file tasn_dec.c related to handling malformed X509_ATTRIBUTE structures. A remote attacker can exploit this to cause a memory leak by triggering a decoding failure in a PKCS#7 or CMS application, resulting in a denial of service. (CVE-2015-3195) - An out-of-bounds read error exists in cURL and libcurl within the smb_request_state() function due to improper bounds checking. An unauthenticated, remote attacker can exploit this, using a malicious SMB server and crafted length and offset values, to disclose sensitive memory information or to cause a denial of service condition. (CVE-2015-3237) - A flaw exists in libxslt in the xsltStylePreCompute() function within file preproc.c due to a failure to check if the parent node is an element. An unauthenticated, remote attacker can exploit this, via a specially crafted XML file, to cause a denial of service condition. (CVE-2015-7995) - An infinite loop condition exists in the xz_decomp() function within file xzlib.c when handling xz compressed XML content due to a failure to detect compression errors. An unauthenticated, remote attacker can exploit this, via specially crafted XML data, to cause a denial of service condition. (CVE-2015-8035) - A double-free error exists due to improper validation of user-supplied input when parsing malformed DSA private keys. A remote attacker can exploit this to corrupt memory, resulting in a denial of service condition or the execution of arbitrary code. (CVE-2016-0705) - An out-of-bounds read error exists in the fmtstr() function within file crypto/bio/b_print.c when printing very long strings due to a failure to properly calculate string lengths. An unauthenticated, remote attacker can exploit this, via a long string, to cause a denial of service condition, as demonstrated by a large amount of ASN.1 data. (CVE-2016-0799) - An unspecified flaw exists that allows a local attacker to impact the confidentiality and integrity of the system. No other details are available. (CVE-2016-2015) - A flaw exists in the doapr_outch() function within file crypto/bio/b_print.c due to a failure to verify that a certain memory allocation succeeds. An unauthenticated, remote attacker can exploit this, via a long string, to cause a denial of service condition, as demonstrated by a large amount of ASN.1 data. (CVE-2016-2842)
    last seen 2019-02-21
    modified 2018-11-15
    plugin id 91222
    published 2016-05-18
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91222
    title HP System Management Homepage Multiple Vulnerabilities (HPSBMU03593)
  • NASL family Slackware Local Security Checks
    NASL id SLACKWARE_SSA_2016-062-02.NASL
    description New openssl packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, and -current to fix security issues.
    last seen 2019-02-21
    modified 2017-09-21
    plugin id 89085
    published 2016-03-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89085
    title Slackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / current : openssl (SSA:2016-062-02) (DROWN)
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2016-0996.NASL
    description From Red Hat Security Advisory 2016:0996 : An update for openssl is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library. Security Fix(es) : * A flaw was found in the way OpenSSL encoded certain ASN.1 data structures. An attacker could use this flaw to create a specially crafted certificate which, when verified or re-encoded by OpenSSL, could cause it to crash, or execute arbitrary code using the permissions of the user running an application compiled against the OpenSSL library. (CVE-2016-2108) * Two integer overflow flaws, leading to buffer overflows, were found in the way the EVP_EncodeUpdate() and EVP_EncryptUpdate() functions of OpenSSL parsed very large amounts of input data. A remote attacker could use these flaws to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application. (CVE-2016-2105, CVE-2016-2106) * It was discovered that OpenSSL leaked timing information when decrypting TLS/SSL and DTLS protocol encrypted records when the connection used the AES CBC cipher suite and the server supported AES-NI. A remote attacker could possibly use this flaw to retrieve plain text from encrypted packets by using a TLS/SSL or DTLS server as a padding oracle. (CVE-2016-2107) * Several flaws were found in the way BIO_*printf functions were implemented in OpenSSL. Applications which passed large amounts of untrusted data through these functions could crash or potentially execute code with the permissions of the user running such an application. (CVE-2016-0799, CVE-2016-2842) * A denial of service flaw was found in the way OpenSSL parsed certain ASN.1-encoded data from BIO (OpenSSL's I/O abstraction) inputs. An application using OpenSSL that accepts untrusted ASN.1 BIO input could be forced to allocate an excessive amount of data. (CVE-2016-2109) Red Hat would like to thank the OpenSSL project for reporting CVE-2016-2108, CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, and CVE-2016-0799. Upstream acknowledges Huzaifa Sidhpurwala (Red Hat), Hanno Bock, and David Benjamin (Google) as the original reporters of CVE-2016-2108; Guido Vranken as the original reporter of CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, and CVE-2016-0799; and Juraj Somorovsky as the original reporter of CVE-2016-2107.
    last seen 2019-02-21
    modified 2018-07-24
    plugin id 91152
    published 2016-05-16
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91152
    title Oracle Linux 6 : openssl (ELSA-2016-0996)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-0620-1.NASL
    description This update for openssl fixes various security issues : Security issues fixed : - CVE-2016-0800 aka the 'DROWN' attack (bsc#968046): OpenSSL was vulnerable to a cross-protocol attack that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. This update changes the openssl library to : - Disable SSLv2 protocol support by default. This can be overridden by setting the environment variable 'OPENSSL_ALLOW_SSL2' or by using SSL_CTX_clear_options using the SSL_OP_NO_SSLv2 flag. Note that various services and clients had already disabled SSL protocol 2 by default previously. - Disable all weak EXPORT ciphers by default. These can be reenabled if required by old legacy software using the environment variable 'OPENSSL_ALLOW_EXPORT'. - CVE-2016-0702 aka the 'CacheBleed' attack. (bsc#968050) Various changes in the modular exponentation code were added that make sure that it is not possible to recover RSA secret keys by analyzing cache-bank conflicts on the Intel Sandy-Bridge microarchitecture. Note that this was only exploitable if the malicious code was running on the same hyper threaded Intel Sandy Bridge processor as the victim thread performing decryptions. - CVE-2016-0705 (bnc#968047): A double free() bug in the DSA ASN1 parser code was fixed that could be abused to facilitate a denial-of-service attack. - CVE-2016-0797 (bnc#968048): The BN_hex2bn() and BN_dec2bn() functions had a bug that could result in an attempt to de-reference a NULL pointer leading to crashes. This could have security consequences if these functions were ever called by user applications with large untrusted hex/decimal data. Also, internal usage of these functions in OpenSSL uses data from config files or application command line arguments. If user developed applications generated config file data based on untrusted data, then this could have had security consequences as well. - CVE-2016-0798 (bnc#968265) The SRP user database lookup method SRP_VBASE_get_by_user() had a memory leak that attackers could abuse to facility DoS attacks. To mitigate the issue, the seed handling in SRP_VBASE_get_by_user() was disabled even if the user has configured a seed. Applications are advised to migrate to SRP_VBASE_get1_by_user(). - CVE-2016-0799 (bnc#968374) On many 64 bit systems, the internal fmtstr() and doapr_outch() functions could miscalculate the length of a string and attempt to access out-of-bounds memory locations. These problems could have enabled attacks where large amounts of untrusted data is passed to the BIO_*printf functions. If applications use these functions in this way then they could have been vulnerable. OpenSSL itself uses these functions when printing out human-readable dumps of ASN.1 data. Therefore applications that print this data could have been vulnerable if the data is from untrusted sources. OpenSSL command line applications could also have been vulnerable when they print out ASN.1 data, or if untrusted data is passed as command line arguments. Libssl is not considered directly vulnerable. - CVE-2015-3197 (bsc#963415): The SSLv2 protocol did not block disabled ciphers. Note that the March 1st 2016 release also references following CVEs that were fixed by us with CVE-2015-0293 in 2015 : - CVE-2016-0703 (bsc#968051): This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. - CVE-2016-0704 (bsc#968053): 'Bleichenbacher oracle in SSLv2' This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. Also the following bug was fixed : - Ensure that OpenSSL doesn't fall back to the default digest algorithm (SHA1) in case a non-FIPS algorithm was negotiated while running in FIPS mode. Instead, OpenSSL will refuse the session. (bnc#958501) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-11-29
    plugin id 89077
    published 2016-03-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89077
    title SUSE SLED12 / SLES12 Security Update : openssl (SUSE-SU-2016:0620-1) (DROWN)
  • NASL family Databases
    NASL id MYSQL_5_6_30.NASL
    description The version of MySQL running on the remote host is 5.6.x prior to 5.6.30. It is, therefore, affected by multiple vulnerabilities : - A cipher algorithm downgrade vulnerability exists in the bundled version of OpenSSL due to a flaw that is triggered when handling cipher negotiation. A remote attacker can exploit this to negotiate SSLv2 ciphers and complete SSLv2 handshakes even if all SSLv2 ciphers have been disabled on the server. Note that this vulnerability only exists if the SSL_OP_NO_SSLv2 option has not been disabled. (CVE-2015-3197) - An unspecified flaw exists in the Pluggable Authentication subcomponent that allows an unauthenticated, remote attacker to execute arbitrary code. (CVE-2016-0639) - An unspecified flaw exists in the Federated subcomponent that allows an authenticated, remote attacker to impact integrity and availability. (CVE-2016-0642) - An unspecified flaw exists in the DML subcomponent that allows an authenticated, remote attacker to disclose sensitive information. (CVE-2016-0643) - An unspecified flaw exists in the FTS subcomponent that allows an authenticated, remote attacker to cause a denial of service condition. (CVE-2016-0647) - An unspecified flaw exists in the PS subcomponent that allows an authenticated, remote attacker to cause a denial of service condition. (CVE-2016-0647) - An unspecified flaw exists in the InnoDB subcomponent that allows an authenticated, remote attacker to cause a denial of service condition. (CVE-2016-0655) - An unspecified flaw exists in the Security: Privileges subcomponent that allows an authenticated, remote attacker to cause a denial of service condition. (CVE-2016-0666) - A key disclosure vulnerability exists in the bundled version of OpenSSL due to improper handling of cache-bank conflicts on the Intel Sandy-bridge microarchitecture. An attacker can exploit this to gain access to RSA key information. (CVE-2016-0702) - A double-free error exists in the bundled version of OpenSSL due to improper validation of user-supplied input when parsing malformed DSA private keys. A remote attacker can exploit this to corrupt memory, resulting in a denial of service condition or the execution of arbitrary code. (CVE-2016-0705) - A NULL pointer dereference flaw exists in the bundled version of OpenSSL in the BN_hex2bn() and BN_dec2bn() functions. A remote attacker can exploit this to trigger a heap corruption, resulting in the execution of arbitrary code. (CVE-2016-0797) - A denial of service vulnerability exists in the bundled version of OpenSSL due to improper handling of invalid usernames. A remote attacker can exploit this, via a specially crafted username, to leak 300 bytes of memory per connection, exhausting available memory resources. (CVE-2016-0798) - Multiple memory corruption issues exist in the bundled version of OpenSSL that allow a remote attacker to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-0799) - A flaw exists in the bundled version of OpenSSL that allows a cross-protocol Bleichenbacher padding oracle attack known as DROWN (Decrypting RSA with Obsolete and Weakened eNcryption). This vulnerability exists due to a flaw in the Secure Sockets Layer Version 2 (SSLv2) implementation, and it allows captured TLS traffic to be decrypted. A man-in-the-middle attacker can exploit this to decrypt the TLS connection by utilizing previously captured traffic and weak cryptography along with a series of specially crafted connections to an SSLv2 server that uses the same private key. (CVE-2016-0800) - A man-in-the-middle spoofing vulnerability exists due to the server hostname not being verified to match a domain name in the Subject's Common Name (CN) or SubjectAltName field of the X.509 certificate. A man-in-the-middle attacker can exploit this, by spoofing the TLS/SSL server via a certificate that appears valid, to disclose sensitive information or manipulate transmitted data. (CVE-2016-2047) - A flaw exists related to certificate validation due to the server hostname not being verified to match a domain name in the X.509 certificate. A man-in-the-middle attacker can exploit this, by spoofing the TLS/SSL server via a certificate that appears valid, to disclose sensitive information or manipulate data. - An integer overflow condition exists that is triggered due to improper validation of user-supplied input when processing client handshakes. An authenticated, remote attacker can exploit this to cause the server to exit, resulting in a denial of service condition. - An information disclosure vulnerability exists due to overly verbose error messages returning part of the SQL statement that produced them. An authenticated, remote attacker can exploit this to disclose sensitive information.
    last seen 2019-02-21
    modified 2019-01-02
    plugin id 90683
    published 2016-04-22
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=90683
    title MySQL 5.6.x < 5.6.30 Multiple Vulnerabilities (DROWN)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2016-292.NASL
    description This update for openssl fixes various security issues : Security issues fixed : - CVE-2016-0800 aka the 'DROWN' attack (bsc#968046): OpenSSL was vulnerable to a cross-protocol attack that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. This update changes the openssl library to : - Disable SSLv2 protocol support by default. This can be overridden by setting the environment variable 'OPENSSL_ALLOW_SSL2' or by using SSL_CTX_clear_options using the SSL_OP_NO_SSLv2 flag. Note that various services and clients had already disabled SSL protocol 2 by default previously. - Disable all weak EXPORT ciphers by default. These can be reenabled if required by old legacy software using the environment variable 'OPENSSL_ALLOW_EXPORT'. - CVE-2016-0702 aka the 'CacheBleed' attack. (bsc#968050) Various changes in the modular exponentation code were added that make sure that it is not possible to recover RSA secret keys by analyzing cache-bank conflicts on the Intel Sandy-Bridge microarchitecture. Note that this was only exploitable if the malicious code was running on the same hyper threaded Intel Sandy Bridge processor as the victim thread performing decryptions. - CVE-2016-0705 (bnc#968047): A double free() bug in the DSA ASN1 parser code was fixed that could be abused to facilitate a denial-of-service attack. - CVE-2016-0797 (bnc#968048): The BN_hex2bn() and BN_dec2bn() functions had a bug that could result in an attempt to de-reference a NULL pointer leading to crashes. This could have security consequences if these functions were ever called by user applications with large untrusted hex/decimal data. Also, internal usage of these functions in OpenSSL uses data from config files or application command line arguments. If user developed applications generated config file data based on untrusted data, then this could have had security consequences as well. - CVE-2016-0798 (bnc#968265) The SRP user database lookup method SRP_VBASE_get_by_user() had a memory leak that attackers could abuse to facility DoS attacks. To mitigate the issue, the seed handling in SRP_VBASE_get_by_user() was disabled even if the user has configured a seed. Applications are advised to migrate to SRP_VBASE_get1_by_user(). - CVE-2016-0799 (bnc#968374) On many 64 bit systems, the internal fmtstr() and doapr_outch() functions could miscalculate the length of a string and attempt to access out-of-bounds memory locations. These problems could have enabled attacks where large amounts of untrusted data is passed to the BIO_*printf functions. If applications use these functions in this way then they could have been vulnerable. OpenSSL itself uses these functions when printing out human-readable dumps of ASN.1 data. Therefore applications that print this data could have been vulnerable if the data is from untrusted sources. OpenSSL command line applications could also have been vulnerable when they print out ASN.1 data, or if untrusted data is passed as command line arguments. Libssl is not considered directly vulnerable. - CVE-2015-3197 (bsc#963415): The SSLv2 protocol did not block disabled ciphers. Note that the March 1st 2016 release also references following CVEs that were fixed by us with CVE-2015-0293 in 2015 : - CVE-2016-0703 (bsc#968051): This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. - CVE-2016-0704 (bsc#968053): 'Bleichenbacher oracle in SSLv2' This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier.
    last seen 2019-02-21
    modified 2016-10-13
    plugin id 89092
    published 2016-03-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89092
    title openSUSE Security Update : openssl (openSUSE-2016-292) (DROWN)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-0617-1.NASL
    description This update for openssl fixes various security issues and bugs : Security issues fixed : - CVE-2016-0800 aka the 'DROWN' attack (bsc#968046): OpenSSL was vulnerable to a cross-protocol attack that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. This update changes the openssl library to : - Disable SSLv2 protocol support by default. This can be overridden by setting the environment variable 'OPENSSL_ALLOW_SSL2' or by using SSL_CTX_clear_options using the SSL_OP_NO_SSLv2 flag. Note that various services and clients had already disabled SSL protocol 2 by default previously. - Disable all weak EXPORT ciphers by default. These can be reenabled if required by old legacy software using the environment variable 'OPENSSL_ALLOW_EXPORT'. - CVE-2016-0702 aka the 'CacheBleed' attack. (bsc#968050) Various changes in the modular exponentation code were added that make sure that it is not possible to recover RSA secret keys by analyzing cache-bank conflicts on the Intel Sandy-Bridge microarchitecture. Note that this was only exploitable if the malicious code was running on the same hyper threaded Intel Sandy Bridge processor as the victim thread performing decryptions. - CVE-2016-0705 (bnc#968047): A double free() bug in the DSA ASN1 parser code was fixed that could be abused to facilitate a denial-of-service attack. - CVE-2016-0797 (bnc#968048): The BN_hex2bn() and BN_dec2bn() functions had a bug that could result in an attempt to de-reference a NULL pointer leading to crashes. This could have security consequences if these functions were ever called by user applications with large untrusted hex/decimal data. Also, internal usage of these functions in OpenSSL uses data from config files or application command line arguments. If user developed applications generated config file data based on untrusted data, then this could have had security consequences as well. - CVE-2016-0798 (bnc#968265) The SRP user database lookup method SRP_VBASE_get_by_user() had a memory leak that attackers could abuse to facility DoS attacks. To mitigate the issue, the seed handling in SRP_VBASE_get_by_user() was disabled even if the user has configured a seed. Applications are advised to migrate to SRP_VBASE_get1_by_user(). - CVE-2016-0799 (bnc#968374) On many 64 bit systems, the internal fmtstr() and doapr_outch() functions could miscalculate the length of a string and attempt to access out-of-bounds memory locations. These problems could have enabled attacks where large amounts of untrusted data is passed to the BIO_*printf functions. If applications use these functions in this way then they could have been vulnerable. OpenSSL itself uses these functions when printing out human-readable dumps of ASN.1 data. Therefore applications that print this data could have been vulnerable if the data is from untrusted sources. OpenSSL command line applications could also have been vulnerable when they print out ASN.1 data, or if untrusted data is passed as command line arguments. Libssl is not considered directly vulnerable. - CVE-2015-3197 (bsc#963415): The SSLv2 protocol did not block disabled ciphers. Note that the March 1st 2016 release also references following CVEs that were fixed by us with CVE-2015-0293 in 2015 : - CVE-2016-0703 (bsc#968051): This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. - CVE-2016-0704 (bsc#968053): 'Bleichenbacher oracle in SSLv2' This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. Bugs fixed : - Avoid running OPENSSL_config twice. This avoids breaking engine loading. (bsc#952871) - Ensure that OpenSSL doesn't fall back to the default digest algorithm (SHA1) in case a non-FIPS algorithm was negotiated while running in FIPS mode. Instead, OpenSSL will refuse the digest. (bnc#958501) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-11-29
    plugin id 89076
    published 2016-03-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89076
    title SUSE SLED12 / SLES12 Security Update : openssl (SUSE-SU-2016:0617-1) (DROWN)
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2016-0086.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : - CVE-2016-0799 - Fix memory issues in BIO_*printf functions - CVE-2016-2105 - Avoid overflow in EVP_EncodeUpdate - CVE-2016-2106 - Fix encrypt overflow - CVE-2016-2109 - Harden ASN.1 BIO handling of large amounts of data. - To disable SSLv2 client connections create the file /etc/sysconfig/openssl-ssl-client-kill-sslv2 (John Haxby) [orabug 21673934] - Backport openssl 08-Jan-2015 security fixes (John Haxby) [orabug 20409893] - fix CVE-2014-3570 - Bignum squaring may produce incorrect results - fix CVE-2014-3571 - DTLS segmentation fault in dtls1_get_record - fix CVE-2014-3572 - ECDHE silently downgrades to ECDH [Client] - fix CVE-2016-2108 - memory corruption in ASN.1 encoder
    last seen 2019-02-21
    modified 2018-07-24
    plugin id 91777
    published 2016-06-23
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91777
    title OracleVM 3.2 : openssl (OVMSA-2016-0086)
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2016-0722.NASL
    description From Red Hat Security Advisory 2016:0722 : An update for openssl is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library. Security Fix(es) : * A flaw was found in the way OpenSSL encoded certain ASN.1 data structures. An attacker could use this flaw to create a specially crafted certificate which, when verified or re-encoded by OpenSSL, could cause it to crash, or execute arbitrary code using the permissions of the user running an application compiled against the OpenSSL library. (CVE-2016-2108) * Two integer overflow flaws, leading to buffer overflows, were found in the way the EVP_EncodeUpdate() and EVP_EncryptUpdate() functions of OpenSSL parsed very large amounts of input data. A remote attacker could use these flaws to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application. (CVE-2016-2105, CVE-2016-2106) * It was discovered that OpenSSL leaked timing information when decrypting TLS/SSL and DTLS protocol encrypted records when the connection used the AES CBC cipher suite and the server supported AES-NI. A remote attacker could possibly use this flaw to retrieve plain text from encrypted packets by using a TLS/SSL or DTLS server as a padding oracle. (CVE-2016-2107) * Several flaws were found in the way BIO_*printf functions were implemented in OpenSSL. Applications which passed large amounts of untrusted data through these functions could crash or potentially execute code with the permissions of the user running such an application. (CVE-2016-0799, CVE-2016-2842) * A denial of service flaw was found in the way OpenSSL parsed certain ASN.1-encoded data from BIO (OpenSSL's I/O abstraction) inputs. An application using OpenSSL that accepts untrusted ASN.1 BIO input could be forced to allocate an excessive amount of data. (CVE-2016-2109) Red Hat would like to thank the OpenSSL project for reporting CVE-2016-2108, CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, and CVE-2016-0799. Upstream acknowledges Huzaifa Sidhpurwala (Red Hat), Hanno Bock, and David Benjamin (Google) as the original reporters of CVE-2016-2108; Guido Vranken as the original reporter of CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, and CVE-2016-0799; and Juraj Somorovsky as the original reporter of CVE-2016-2107.
    last seen 2019-02-21
    modified 2018-07-24
    plugin id 91029
    published 2016-05-11
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91029
    title Oracle Linux 7 : openssl (ELSA-2016-0722)
  • NASL family Web Servers
    NASL id OPENSSL_1_0_1S.NASL
    description According to its banner, the remote host is running a version of OpenSSL 1.0.1 prior to 1.0.1s. It is, therefore, affected by the following vulnerabilities : - A key disclosure vulnerability exists due to improper handling of cache-bank conflicts on the Intel Sandy-bridge microarchitecture. An attacker can exploit this to gain access to RSA key information. (CVE-2016-0702) - A double-free error exists due to improper validation of user-supplied input when parsing malformed DSA private keys. A remote attacker can exploit this to corrupt memory, resulting in a denial of service condition or the execution of arbitrary code. (CVE-2016-0705) - A NULL pointer dereference flaw exists in the BN_hex2bn() and BN_dec2bn() functions. A remote attacker can exploit this to trigger a heap corruption, resulting in the execution of arbitrary code. (CVE-2016-0797) - A denial of service vulnerability exists due to improper handling of invalid usernames. A remote attacker can exploit this, via a specially crafted username, to leak 300 bytes of memory per connection, exhausting available memory resources. (CVE-2016-0798) - Multiple memory corruption issues exist that allow a remote attacker to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-0799) - A flaw exists that allows a cross-protocol Bleichenbacher padding oracle attack known as DROWN (Decrypting RSA with Obsolete and Weakened eNcryption). This vulnerability exists due to a flaw in the Secure Sockets Layer Version 2 (SSLv2) implementation, and it allows captured TLS traffic to be decrypted. A man-in-the-middle attacker can exploit this to decrypt the TLS connection by utilizing previously captured traffic and weak cryptography along with a series of specially crafted connections to an SSLv2 server that uses the same private key. (CVE-2016-0800)
    last seen 2019-02-21
    modified 2018-07-16
    plugin id 89081
    published 2016-03-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89081
    title OpenSSL 1.0.1 < 1.0.1s Multiple Vulnerabilities (DROWN)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20160509_OPENSSL_ON_SL7_X.NASL
    description Security Fix(es) : - A flaw was found in the way OpenSSL encoded certain ASN.1 data structures. An attacker could use this flaw to create a specially crafted certificate which, when verified or re-encoded by OpenSSL, could cause it to crash, or execute arbitrary code using the permissions of the user running an application compiled against the OpenSSL library. (CVE-2016-2108) - Two integer overflow flaws, leading to buffer overflows, were found in the way the EVP_EncodeUpdate() and EVP_EncryptUpdate() functions of OpenSSL parsed very large amounts of input data. A remote attacker could use these flaws to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application. (CVE-2016-2105, CVE-2016-2106) - It was discovered that OpenSSL leaked timing information when decrypting TLS/SSL and DTLS protocol encrypted records when the connection used the AES CBC cipher suite and the server supported AES-NI. A remote attacker could possibly use this flaw to retrieve plain text from encrypted packets by using a TLS/SSL or DTLS server as a padding oracle. (CVE-2016-2107) - Several flaws were found in the way BIO_*printf functions were implemented in OpenSSL. Applications which passed large amounts of untrusted data through these functions could crash or potentially execute code with the permissions of the user running such an application. (CVE-2016-0799, CVE-2016-2842) - A denial of service flaw was found in the way OpenSSL parsed certain ASN.1-encoded data from BIO (OpenSSL's I/O abstraction) inputs. An application using OpenSSL that accepts untrusted ASN.1 BIO input could be forced to allocate an excessive amount of data. (CVE-2016-2109)
    last seen 2019-02-21
    modified 2018-12-28
    plugin id 91041
    published 2016-05-11
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91041
    title Scientific Linux Security Update : openssl on SL7.x x86_64
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2016-289.NASL
    description This update for openssl fixes various security issues : Security issues fixed : - CVE-2016-0800 aka the 'DROWN' attack (bsc#968046): OpenSSL was vulnerable to a cross-protocol attack that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. This update changes the openssl library to : - Disable SSLv2 protocol support by default. This can be overridden by setting the environment variable 'OPENSSL_ALLOW_SSL2' or by using SSL_CTX_clear_options using the SSL_OP_NO_SSLv2 flag. Note that various services and clients had already disabled SSL protocol 2 by default previously. - Disable all weak EXPORT ciphers by default. These can be reenabled if required by old legacy software using the environment variable 'OPENSSL_ALLOW_EXPORT'. - CVE-2016-0702 aka the 'CacheBleed' attack. (bsc#968050) Various changes in the modular exponentation code were added that make sure that it is not possible to recover RSA secret keys by analyzing cache-bank conflicts on the Intel Sandy-Bridge microarchitecture. Note that this was only exploitable if the malicious code was running on the same hyper threaded Intel Sandy Bridge processor as the victim thread performing decryptions. - CVE-2016-0705 (bnc#968047): A double free() bug in the DSA ASN1 parser code was fixed that could be abused to facilitate a denial-of-service attack. - CVE-2016-0797 (bnc#968048): The BN_hex2bn() and BN_dec2bn() functions had a bug that could result in an attempt to de-reference a NULL pointer leading to crashes. This could have security consequences if these functions were ever called by user applications with large untrusted hex/decimal data. Also, internal usage of these functions in OpenSSL uses data from config files or application command line arguments. If user developed applications generated config file data based on untrusted data, then this could have had security consequences as well. - CVE-2016-0798 (bnc#968265) The SRP user database lookup method SRP_VBASE_get_by_user() had a memory leak that attackers could abuse to facility DoS attacks. To mitigate the issue, the seed handling in SRP_VBASE_get_by_user() was disabled even if the user has configured a seed. Applications are advised to migrate to SRP_VBASE_get1_by_user(). - CVE-2016-0799 (bnc#968374) On many 64 bit systems, the internal fmtstr() and doapr_outch() functions could miscalculate the length of a string and attempt to access out-of-bounds memory locations. These problems could have enabled attacks where large amounts of untrusted data is passed to the BIO_*printf functions. If applications use these functions in this way then they could have been vulnerable. OpenSSL itself uses these functions when printing out human-readable dumps of ASN.1 data. Therefore applications that print this data could have been vulnerable if the data is from untrusted sources. OpenSSL command line applications could also have been vulnerable when they print out ASN.1 data, or if untrusted data is passed as command line arguments. Libssl is not considered directly vulnerable. - CVE-2015-3197 (bsc#963415): The SSLv2 protocol did not block disabled ciphers. Note that the March 1st 2016 release also references following CVEs that were fixed by us with CVE-2015-0293 in 2015 : - CVE-2016-0703 (bsc#968051): This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. - CVE-2016-0704 (bsc#968053): 'Bleichenbacher oracle in SSLv2' This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. Also the following bug was fixed : - Ensure that OpenSSL doesn't fall back to the default digest algorithm (SHA1) in case a non-FIPS algorithm was negotiated while running in FIPS mode. Instead, OpenSSL will refuse the session. (bnc#958501) This update was imported from the SUSE:SLE-12-SP1:Update update project.
    last seen 2019-02-21
    modified 2016-10-13
    plugin id 89091
    published 2016-03-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89091
    title openSUSE Security Update : openssl (openSUSE-2016-289) (DROWN)
  • NASL family Databases
    NASL id MYSQL_5_6_30_RPM.NASL
    description The version of Oracle MySQL installed on the remote host is 5.6.x prior to 5.6.30. It is, therefore, affected by the following vulnerabilities : - A cipher algorithm downgrade vulnerability exists in the bundled version of OpenSSL due to a flaw that is triggered when handling cipher negotiation. A remote attacker can exploit this to negotiate SSLv2 ciphers and complete SSLv2 handshakes even if all SSLv2 ciphers have been disabled on the server. Note that this vulnerability only exists if the SSL_OP_NO_SSLv2 option has not been disabled. (CVE-2015-3197) - An unspecified flaw exists in the Pluggable Authentication subcomponent that allows an unauthenticated, remote attacker to execute arbitrary code. (CVE-2016-0639) - An unspecified flaw exists in the Federated subcomponent that allows a local attacker to impact integrity and availability. (CVE-2016-0642) - An unspecified flaw exists in the DML subcomponent that allows a local attacker to disclose potentially sensitive information. (CVE-2016-0643) - An unspecified flaw exists in the FTS subcomponent that allows a local attacker to cause a denial of service condition. (CVE-2016-0647) - An unspecified flaw exists in the PS subcomponent that allows a local attacker to cause a denial of service condition. (CVE-2016-0648) - An unspecified flaw exists in the InnoDB subcomponent that allows a local attacker to cause a denial of service condition. (CVE-2016-0655) - An unspecified flaw exists in the Security: Privileges subcomponent that allows a local attacker to cause a denial of service condition. (CVE-2016-0666) - A key disclosure vulnerability exists in the bundled version of OpenSSL due to improper handling of cache-bank conflicts on the Intel Sandy-bridge microarchitecture. An attacker can exploit this to gain access to RSA key information. (CVE-2016-0702) - A double-free error exists in the bundled version of OpenSSL due to improper validation of user-supplied input when parsing malformed DSA private keys. A remote attacker can exploit this to corrupt memory, resulting in a denial of service condition or the execution of arbitrary code. (CVE-2016-0705) - A NULL pointer dereference flaw exists in the bundled version of OpenSSL in the BN_hex2bn() and BN_dec2bn() functions. A remote attacker can exploit this to trigger a heap corruption, resulting in the execution of arbitrary code. (CVE-2016-0797) - A denial of service vulnerability exists in the bundled version of OpenSSL due to improper handling of invalid usernames. A remote attacker can exploit this, via a specially crafted username, to leak 300 bytes of memory per connection, exhausting available memory resources. (CVE-2016-0798) - Multiple memory corruption issues exist in the bundled version of OpenSSL that allow a remote attacker to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-0799) - A flaw exists in the bundled version of OpenSSL that allows a cross-protocol Bleichenbacher padding oracle attack known as DROWN (Decrypting RSA with Obsolete and Weakened eNcryption). This vulnerability exists due to a flaw in the Secure Sockets Layer Version 2 (SSLv2) implementation, and it allows captured TLS traffic to be decrypted. A man-in-the-middle attacker can exploit this to decrypt the TLS connection by utilizing previously captured traffic and weak cryptography along with a series of specially crafted connections to an SSLv2 server that uses the same private key. (CVE-2016-0800) - A man-in-the-middle spoofing vulnerability exists due to the server hostname not being verified to match a domain name in the Subject's Common Name (CN) or SubjectAltName field of the X.509 certificate. A man-in-the-middle attacker can exploit this, by spoofing the TLS/SSL server via a certificate that appears valid, to disclose sensitive information or manipulate transmitted data. (CVE-2016-2047) - An unspecified flaw exists in the Security: Encryption subcomponent that allows an unauthenticated, remote attacker to disclose potentially sensitive information. (CVE-2016-3452) - An unspecified flaw exists in the Connection subcomponent that allows an unauthenticated, remote attacker to disclose potentially sensitive information. (CVE-2016-5444)
    last seen 2019-02-21
    modified 2018-11-15
    plugin id 90832
    published 2016-05-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=90832
    title Oracle MySQL 5.6.x < 5.6.30 Multiple Vulnerabilities (April 2016 CPU) (July 2016 CPU) (DROWN)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-0624-1.NASL
    description This update for openssl fixes various security issues and bugs : Security issues fixed : - CVE-2016-0800 aka the 'DROWN' attack (bsc#968046): OpenSSL was vulnerable to a cross-protocol attack that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. This update changes the openssl library to : - Disable SSLv2 protocol support by default. This can be overridden by setting the environment variable 'OPENSSL_ALLOW_SSL2' or by using SSL_CTX_clear_options using the SSL_OP_NO_SSLv2 flag. Note that various services and clients had already disabled SSL protocol 2 by default previously. - Disable all weak EXPORT ciphers by default. These can be reenabled if required by old legacy software using the environment variable 'OPENSSL_ALLOW_EXPORT'. - CVE-2016-0705 (bnc#968047): A double free() bug in the DSA ASN1 parser code was fixed that could be abused to facilitate a denial-of-service attack. - CVE-2016-0797 (bnc#968048): The BN_hex2bn() and BN_dec2bn() functions had a bug that could result in an attempt to de-reference a NULL pointer leading to crashes. This could have security consequences if these functions were ever called by user applications with large untrusted hex/decimal data. Also, internal usage of these functions in OpenSSL uses data from config files or application command line arguments. If user developed applications generated config file data based on untrusted data, then this could have had security consequences as well. - CVE-2016-0799 (bnc#968374) On many 64 bit systems, the internal fmtstr() and doapr_outch() functions could miscalculate the length of a string and attempt to access out-of-bounds memory locations. These problems could have enabled attacks where large amounts of untrusted data is passed to the BIO_*printf functions. If applications use these functions in this way then they could have been vulnerable. OpenSSL itself uses these functions when printing out human-readable dumps of ASN.1 data. Therefore applications that print this data could have been vulnerable if the data is from untrusted sources. OpenSSL command line applications could also have been vulnerable when they print out ASN.1 data, or if untrusted data is passed as command line arguments. Libssl is not considered directly vulnerable. - CVE-2015-3197 (bsc#963415): The SSLv2 protocol did not block disabled ciphers. Note that the March 1st 2016 release also references following CVEs that were fixed by us with CVE-2015-0293 in 2015 : - CVE-2016-0703 (bsc#968051): This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. - CVE-2016-0704 (bsc#968053): 'Bleichenbacher oracle in SSLv2' This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. Also fixes the following bug : - Avoid running OPENSSL_config twice. This avoids breaking engine loading and also fixes a memory leak in libssl. (bsc#952871 bsc#967787) Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-11-29
    plugin id 89655
    published 2016-03-04
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89655
    title SUSE SLED11 / SLES11 Security Update : openssl (SUSE-SU-2016:0624-1) (DROWN)
  • NASL family Ubuntu Local Security Checks
    NASL id UBUNTU_USN-2914-1.NASL
    description Yuval Yarom, Daniel Genkin, and Nadia Heninger discovered that OpenSSL was vulnerable to a side-channel attack on modular exponentiation. On certain CPUs, a local attacker could possibly use this issue to recover RSA keys. This flaw is known as CacheBleed. (CVE-2016-0702) Adam Langley discovered that OpenSSL incorrectly handled memory when parsing DSA private keys. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-0705) Guido Vranken discovered that OpenSSL incorrectly handled hex digit calculation in the BN_hex2bn function. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-0797) Emilia Kasper discovered that OpenSSL incorrectly handled memory when performing SRP user database lookups. A remote attacker could possibly use this issue to cause OpenSSL to consume memory, resulting in a denial of service. (CVE-2016-0798) Guido Vranken discovered that OpenSSL incorrectly handled memory when printing very long strings. A remote attacker could use this issue to cause OpenSSL to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2016-0799). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-12-01
    plugin id 89078
    published 2016-03-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89078
    title Ubuntu 12.04 LTS / 14.04 LTS / 15.10 : openssl vulnerabilities (USN-2914-1)
  • NASL family Gentoo Local Security Checks
    NASL id GENTOO_GLSA-201603-15.NASL
    description The remote host is affected by the vulnerability described in GLSA-201603-15 (OpenSSL: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in OpenSSL, the worst being a cross-protocol attack called DROWN that could lead to the decryption of TLS sessions. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could decrypt TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle, cause a Denial of Service condition, obtain sensitive information from memory and (in rare circumstances) recover RSA keys. Workaround : A workaround for DROWN is disabling the SSLv2 protocol on all SSL/TLS servers.
    last seen 2019-02-21
    modified 2016-10-10
    plugin id 90053
    published 2016-03-21
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=90053
    title GLSA-201603-15 : OpenSSL: Multiple vulnerabilities (DROWN)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2016-327.NASL
    description This update for compat-openssl098 fixes various security issues and bugs : Security issues fixed : - CVE-2016-0800 aka the 'DROWN' attack (bsc#968046): OpenSSL was vulnerable to a cross-protocol attack that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. This update changes the openssl library to : - Disable SSLv2 protocol support by default. This can be overridden by setting the environment variable 'OPENSSL_ALLOW_SSL2' or by using SSL_CTX_clear_options using the SSL_OP_NO_SSLv2 flag. Note that various services and clients had already disabled SSL protocol 2 by default previously. - Disable all weak EXPORT ciphers by default. These can be reenabled if required by old legacy software using the environment variable 'OPENSSL_ALLOW_EXPORT'. - CVE-2016-0797 (bnc#968048): The BN_hex2bn() and BN_dec2bn() functions had a bug that could result in an attempt to de-reference a NULL pointer leading to crashes. This could have security consequences if these functions were ever called by user applications with large untrusted hex/decimal data. Also, internal usage of these functions in OpenSSL uses data from config files or application command line arguments. If user developed applications generated config file data based on untrusted data, then this could have had security consequences as well. - CVE-2016-0799 (bnc#968374) On many 64 bit systems, the internal fmtstr() and doapr_outch() functions could miscalculate the length of a string and attempt to access out-of-bounds memory locations. These problems could have enabled attacks where large amounts of untrusted data is passed to the BIO_*printf functions. If applications use these functions in this way then they could have been vulnerable. OpenSSL itself uses these functions when printing out human-readable dumps of ASN.1 data. Therefore applications that print this data could have been vulnerable if the data is from untrusted sources. OpenSSL command line applications could also have been vulnerable when they print out ASN.1 data, or if untrusted data is passed as command line arguments. Libssl is not considered directly vulnerable. - CVE-2015-3197 (bsc#963415): The SSLv2 protocol did not block disabled ciphers. Note that the March 1st 2016 release also references following CVEs that were fixed by us with CVE-2015-0293 in 2015 : - CVE-2016-0703 (bsc#968051): This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. - CVE-2016-0704 (bsc#968053): 'Bleichenbacher oracle in SSLv2' This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. Also fixes the following bug : - Avoid running OPENSSL_config twice. This avoids breaking engine loading and also fixes a memory leak in libssl. (bsc#952871) This update was imported from the SUSE:SLE-12:Update update project.
    last seen 2019-02-21
    modified 2016-10-13
    plugin id 89910
    published 2016-03-14
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89910
    title openSUSE Security Update : openssl (openSUSE-2016-327) (DROWN)
  • NASL family AIX Local Security Checks
    NASL id AIX_OPENSSL_ADVISORY18.NASL
    description The version of OpenSSL installed on the remote AIX host is affected by the following vulnerabilities : - A key disclosure vulnerability exists due to improper handling of cache-bank conflicts on the Intel Sandy-bridge microarchitecture. An attacker can exploit this to gain access to RSA key information. (CVE-2016-0702) - A double-free error exists due to improper validation of user-supplied input when parsing malformed DSA private keys. A remote attacker can exploit this to corrupt memory, resulting in a denial of service condition or the execution of arbitrary code. (CVE-2016-0705) - A NULL pointer dereference flaw exists in the BN_hex2bn() and BN_dec2bn() functions. A remote attacker can exploit this to trigger a heap corruption, resulting in the execution of arbitrary code. (CVE-2016-0797) - A denial of service vulnerability exists due to improper handling of invalid usernames. A remote attacker can exploit this, via a specially crafted username, to leak 300 bytes of memory per connection, exhausting available memory resources. (CVE-2016-0798) - Multiple memory corruption issues exist that allow a remote attacker to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-0799) - A flaw exists that allows a cross-protocol Bleichenbacher padding oracle attack known as DROWN (Decrypting RSA with Obsolete and Weakened eNcryption). This vulnerability exists due to a flaw in the Secure Sockets Layer Version 2 (SSLv2) implementation, and it allows captured TLS traffic to be decrypted. A man-in-the-middle attacker can exploit this to decrypt the TLS connection by utilizing previously captured traffic and weak cryptography along with a series of specially crafted connections to an SSLv2 server that uses the same private key. (CVE-2016-0800) - A denial of service vulnerability exists due to improper verification of memory allocation by the doapr_outch() function in file crypto/bio/b_print.c. A remote attacker can exploit this, via a specially crafted string, to write data out-of-bounds or exhaust memory resources or possibly have other unspecified impact. (CVE-2016-2842)
    last seen 2019-02-21
    modified 2018-07-17
    plugin id 90448
    published 2016-04-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=90448
    title AIX OpenSSL Advisory : openssl_advisory18.asc / openssl_advisory19.asc (DROWN)
  • NASL family CGI abuses
    NASL id SPLUNK_6334.NASL
    description According to its version number, the instance of Splunk hosted on the remote web server is Enterprise 5.0.x prior to 5.0.15, 6.0.x prior to 6.0.11, 6.1.x prior to 6.1.10, 6.2.x prior to 6.2.9, 6.3.x prior to 6.3.3.4, Light 6.2.x prior to 6.2.9, or Light 6.3.x prior to 6.3.3.4. It is, therefore, affected by the following vulnerabilities : - A type confusion error exists in the bundled version of libxslt in the xsltStylePreCompute() function due to improper handling of invalid values. A context-dependent attacker can exploit this, via crafted XML files, to cause a denial of service condition. (CVE-2015-7995) - A key disclosure vulnerability exists in the bundled version of OpenSSL due to improper handling of cache-bank conflicts on the Intel Sandy-bridge microarchitecture. An attacker can exploit this to gain access to RSA key information. (CVE-2016-0702) - A double-free error exists in the bundled version of OpenSSL due to improper validation of user-supplied input when parsing malformed DSA private keys. A remote attacker can exploit this to corrupt memory, resulting in a denial of service condition or the execution of arbitrary code. (CVE-2016-0705) - A NULL pointer dereference flaw exists in the bundled version of OpenSSL in the BN_hex2bn() and BN_dec2bn() functions. A remote attacker can exploit this to trigger a heap corruption, resulting in the execution of arbitrary code. (CVE-2016-0797) - A denial of service vulnerability exists in the bundled version of OpenSSL due to improper handling of invalid usernames. A remote attacker can exploit this, via a specially crafted username, to leak 300 bytes of memory per connection, exhausting available memory resources. (CVE-2016-0798) - Multiple memory corruption issues exist in the bundled version of OpenSSL that allow a remote attacker to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-0799) - A flaw exists in the bundled version of OpenSSL that allows a cross-protocol Bleichenbacher padding oracle attack known as DROWN (Decrypting RSA with Obsolete and Weakened eNcryption). This vulnerability exists due to a flaw in the Secure Sockets Layer Version 2 (SSLv2) implementation, and it allows captured TLS traffic to be decrypted. A man-in-the-middle attacker can exploit this to decrypt the TLS connection by utilizing previously captured traffic and weak cryptography along with a series of specially crafted connections to an SSLv2 server that uses the same private key. (CVE-2016-0800) - A flaw exists due to improper handling of specially crafted HTTP requests that contain specific headers. An unauthenticated, remote attacker can exploit this to cause a denial of service condition. - A flaw exists due to improper handling of malformed HTTP requests. An unauthenticated, remote attacker can exploit this to cause a denial of service condition. - A flaw exists that is triggered when directly accessing objects. An authenticated, remote attacker can exploit this to disclose search logs. - A flaw exists due to the failure to honor the sslVersions keyword for TLS protocol versions, preventing users from enforcing TLS policies. - A path traversal vulnerability exists in the 'collect' command due to improper sanitization of user-supplied input. An authenticated, remote attacker can exploit this, via a specially crafted request, to execute arbitrary code arbitrary code with the privileges of the user running the splunkd process. - A path traversal vulnerability exists in the 'inputcsv' and 'outputcsv' commands due to improper sanitization of user-supplied input. An authenticated, remote attacker can exploit this, via a specially crafted request, to can access or overwrite file paths. Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
    last seen 2019-02-21
    modified 2019-01-02
    plugin id 90705
    published 2016-04-25
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=90705
    title Splunk Enterprise < 5.0.15 / 6.0.11 / 6.1.10 / 6.2.9 / 6.3.3.4 or Splunk Light < 6.2.9 / 6.3.3.4 Multiple Vulnerabilities (DROWN)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2016-0996.NASL
    description An update for openssl is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library. Security Fix(es) : * A flaw was found in the way OpenSSL encoded certain ASN.1 data structures. An attacker could use this flaw to create a specially crafted certificate which, when verified or re-encoded by OpenSSL, could cause it to crash, or execute arbitrary code using the permissions of the user running an application compiled against the OpenSSL library. (CVE-2016-2108) * Two integer overflow flaws, leading to buffer overflows, were found in the way the EVP_EncodeUpdate() and EVP_EncryptUpdate() functions of OpenSSL parsed very large amounts of input data. A remote attacker could use these flaws to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application. (CVE-2016-2105, CVE-2016-2106) * It was discovered that OpenSSL leaked timing information when decrypting TLS/SSL and DTLS protocol encrypted records when the connection used the AES CBC cipher suite and the server supported AES-NI. A remote attacker could possibly use this flaw to retrieve plain text from encrypted packets by using a TLS/SSL or DTLS server as a padding oracle. (CVE-2016-2107) * Several flaws were found in the way BIO_*printf functions were implemented in OpenSSL. Applications which passed large amounts of untrusted data through these functions could crash or potentially execute code with the permissions of the user running such an application. (CVE-2016-0799, CVE-2016-2842) * A denial of service flaw was found in the way OpenSSL parsed certain ASN.1-encoded data from BIO (OpenSSL's I/O abstraction) inputs. An application using OpenSSL that accepts untrusted ASN.1 BIO input could be forced to allocate an excessive amount of data. (CVE-2016-2109) Red Hat would like to thank the OpenSSL project for reporting CVE-2016-2108, CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, and CVE-2016-0799. Upstream acknowledges Huzaifa Sidhpurwala (Red Hat), Hanno Bock, and David Benjamin (Google) as the original reporters of CVE-2016-2108; Guido Vranken as the original reporter of CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, and CVE-2016-0799; and Juraj Somorovsky as the original reporter of CVE-2016-2107.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 91037
    published 2016-05-11
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91037
    title RHEL 6 : openssl (RHSA-2016:0996)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20160510_OPENSSL_ON_SL6_X.NASL
    description Security Fix(es) : - A flaw was found in the way OpenSSL encoded certain ASN.1 data structures. An attacker could use this flaw to create a specially crafted certificate which, when verified or re-encoded by OpenSSL, could cause it to crash, or execute arbitrary code using the permissions of the user running an application compiled against the OpenSSL library. (CVE-2016-2108) - Two integer overflow flaws, leading to buffer overflows, were found in the way the EVP_EncodeUpdate() and EVP_EncryptUpdate() functions of OpenSSL parsed very large amounts of input data. A remote attacker could use these flaws to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application. (CVE-2016-2105, CVE-2016-2106) - It was discovered that OpenSSL leaked timing information when decrypting TLS/SSL and DTLS protocol encrypted records when the connection used the AES CBC cipher suite and the server supported AES-NI. A remote attacker could possibly use this flaw to retrieve plain text from encrypted packets by using a TLS/SSL or DTLS server as a padding oracle. (CVE-2016-2107) - Several flaws were found in the way BIO_*printf functions were implemented in OpenSSL. Applications which passed large amounts of untrusted data through these functions could crash or potentially execute code with the permissions of the user running such an application. (CVE-2016-0799, CVE-2016-2842) - A denial of service flaw was found in the way OpenSSL parsed certain ASN.1-encoded data from BIO (OpenSSL's I/O abstraction) inputs. An application using OpenSSL that accepts untrusted ASN.1 BIO input could be forced to allocate an excessive amount of data. (CVE-2016-2109)
    last seen 2019-02-21
    modified 2018-12-28
    plugin id 91541
    published 2016-06-09
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91541
    title Scientific Linux Security Update : openssl on SL6.x i386/x86_64
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2016-2073.NASL
    description An update for openssl is now available for Red Hat Enterprise Linux 6.7 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library. Security Fix(es) : * A flaw was found in the way OpenSSL encoded certain ASN.1 data structures. An attacker could use this flaw to create a specially crafted certificate which, when verified or re-encoded by OpenSSL, could cause it to crash, or execute arbitrary code using the permissions of the user running an application compiled against the OpenSSL library. (CVE-2016-2108) * Two integer overflow flaws, leading to buffer overflows, were found in the way the EVP_EncodeUpdate() and EVP_EncryptUpdate() functions of OpenSSL parsed very large amounts of input data. A remote attacker could use these flaws to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application. (CVE-2016-2105, CVE-2016-2106) * It was discovered that OpenSSL leaked timing information when decrypting TLS/SSL and DTLS protocol encrypted records when the connection used the AES CBC cipher suite and the server supported AES-NI. A remote attacker could possibly use this flaw to retrieve plain text from encrypted packets by using a TLS/SSL or DTLS server as a padding oracle. (CVE-2016-2107) * Several flaws were found in the way BIO_*printf functions were implemented in OpenSSL. Applications which passed large amounts of untrusted data through these functions could crash or potentially execute code with the permissions of the user running such an application. (CVE-2016-0799, CVE-2016-2842) * A denial of service flaw was found in the way OpenSSL parsed certain ASN.1-encoded data from BIO (OpenSSL's I/O abstraction) inputs. An application using OpenSSL that accepts untrusted ASN.1 BIO input could be forced to allocate an excessive amount of data. (CVE-2016-2109) Red Hat would like to thank the OpenSSL project for reporting CVE-2016-2108, CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, and CVE-2016-0799. Upstream acknowledges Huzaifa Sidhpurwala (Red Hat), Hanno Bock, and David Benjamin (Google) as the original reporters of CVE-2016-2108; Guido Vranken as the original reporter of CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, and CVE-2016-0799; and Juraj Somorovsky as the original reporter of CVE-2016-2107.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 94105
    published 2016-10-18
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=94105
    title RHEL 6 : openssl (RHSA-2016:2073)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2016-0722.NASL
    description An update for openssl is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library. Security Fix(es) : * A flaw was found in the way OpenSSL encoded certain ASN.1 data structures. An attacker could use this flaw to create a specially crafted certificate which, when verified or re-encoded by OpenSSL, could cause it to crash, or execute arbitrary code using the permissions of the user running an application compiled against the OpenSSL library. (CVE-2016-2108) * Two integer overflow flaws, leading to buffer overflows, were found in the way the EVP_EncodeUpdate() and EVP_EncryptUpdate() functions of OpenSSL parsed very large amounts of input data. A remote attacker could use these flaws to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application. (CVE-2016-2105, CVE-2016-2106) * It was discovered that OpenSSL leaked timing information when decrypting TLS/SSL and DTLS protocol encrypted records when the connection used the AES CBC cipher suite and the server supported AES-NI. A remote attacker could possibly use this flaw to retrieve plain text from encrypted packets by using a TLS/SSL or DTLS server as a padding oracle. (CVE-2016-2107) * Several flaws were found in the way BIO_*printf functions were implemented in OpenSSL. Applications which passed large amounts of untrusted data through these functions could crash or potentially execute code with the permissions of the user running such an application. (CVE-2016-0799, CVE-2016-2842) * A denial of service flaw was found in the way OpenSSL parsed certain ASN.1-encoded data from BIO (OpenSSL's I/O abstraction) inputs. An application using OpenSSL that accepts untrusted ASN.1 BIO input could be forced to allocate an excessive amount of data. (CVE-2016-2109) Red Hat would like to thank the OpenSSL project for reporting CVE-2016-2108, CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, and CVE-2016-0799. Upstream acknowledges Huzaifa Sidhpurwala (Red Hat), Hanno Bock, and David Benjamin (Google) as the original reporters of CVE-2016-2108; Guido Vranken as the original reporter of CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, and CVE-2016-0799; and Juraj Somorovsky as the original reporter of CVE-2016-2107.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 91033
    published 2016-05-11
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91033
    title RHEL 7 : openssl (RHSA-2016:0722)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2016-288.NASL
    description This update for openssl fixes the following issues : Security issues fixed : - CVE-2016-0800 aka the 'DROWN' attack (bsc#968046): OpenSSL was vulnerable to a cross-protocol attack that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. This update changes the openssl library to : - Disable SSLv2 protocol support by default. This can be overridden by setting the environment variable 'OPENSSL_ALLOW_SSL2' or by using SSL_CTX_clear_options using the SSL_OP_NO_SSLv2 flag. Note that various services and clients had already disabled SSL protocol 2 by default previously. Please also note that we built the 13.2 openSUSE openssl already with 'no-ssl2'. - Disable all weak EXPORT ciphers by default. These can be reenabled if required by old legacy software using the environment variable 'OPENSSL_ALLOW_EXPORT'. - CVE-2016-0702 aka the 'CacheBleed' attack. (bsc#968050) Various changes in the modular exponentation code were added that make sure that it is not possible to recover RSA secret keys by analyzing cache-bank conflicts on the Intel Sandy-Bridge microarchitecture. Note that this was only exploitable if the malicious code was running on the same hyper threaded Intel Sandy Bridge processor as the victim thread performing decryptions. - CVE-2016-0705 (bnc#968047): A double free() bug in the DSA ASN1 parser code was fixed that could be abused to facilitate a denial-of-service attack. - CVE-2016-0797 (bnc#968048): The BN_hex2bn() and BN_dec2bn() functions had a bug that could result in an attempt to de-reference a NULL pointer leading to crashes. This could have security consequences if these functions were ever called by user applications with large untrusted hex/decimal data. Also, internal usage of these functions in OpenSSL uses data from config files or application command line arguments. If user developed applications generated config file data based on untrusted data, then this could have had security consequences as well. - CVE-2016-0798 (bnc#968265) The SRP user database lookup method SRP_VBASE_get_by_user() had a memory leak that attackers could abuse to facility DoS attacks. To mitigate the issue, the seed handling in SRP_VBASE_get_by_user() was disabled even if the user has configured a seed. Applications are advised to - We're unaffected by CVE-2016-0799 (boo#968374) because we use glibc's printf implementation instead of the built in one Bugs fixed : - avoid running OPENSSL_config twice. This avoids breaking engine loading. (boo#952871)
    last seen 2019-02-21
    modified 2016-10-13
    plugin id 89090
    published 2016-03-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89090
    title openSUSE Security Update : openssl (openSUSE-2016-288) (DROWN)
  • NASL family Amazon Linux Local Security Checks
    NASL id ALA_ALAS-2016-661.NASL
    description A padding oracle flaw was found in the Secure Sockets Layer version 2.0 (SSLv2) protocol. An attacker can potentially use this flaw to decrypt RSA-encrypted cipher text from a connection using a newer SSL/TLS protocol version, allowing them to decrypt such connections. This cross-protocol attack is publicly referred to as DROWN (CVE-2016-0800). Prior to this advisory, SSLv2 has been disabled by default in OpenSSL on the Amazon Linux AMI. However, application configurations may still re-enable SSLv2. A flaw was found in the way TLS 1.2 could use the MD5 hash function for signing ServerKeyExchange and Client Authentication packets during a TLS handshake. A man-in-the-middle attacker able to force a TLS connection to use the MD5 hash function could use this flaw to conduct collision attacks to impersonate a TLS server or an authenticated TLS client. (CVE-2015-7575 , Medium) A flaw was found in the way malicious SSLv2 clients could negotiate SSLv2 ciphers that have been disabled on the server. This could result in weak SSLv2 ciphers being used for SSLv2 connections, making them vulnerable to man-in-the-middle attacks. (CVE-2015-3197 , Low) A side-channel attack was found that makes use of cache-bank conflicts on the Intel Sandy-Bridge microarchitecture. An attacker who has the ability to control code in a thread running on the same hyper-threaded core as the victim's thread that is performing decryption, could use this flaw to recover RSA private keys. (CVE-2016-0702 , Low) A double-free flaw was found in the way OpenSSL parsed certain malformed DSA (Digital Signature Algorithm) private keys. An attacker could create specially crafted DSA private keys that, when processed by an application compiled against OpenSSL, could cause the application to crash. (CVE-2016-0705 , Low) An integer overflow flaw, leading to a NULL pointer dereference or a heap-based memory corruption, was found in the way some BIGNUM functions of OpenSSL were implemented. Applications that use these functions with large untrusted input could crash or, potentially, execute arbitrary code. (CVE-2016-0797 , Low) The fmtstr function in crypto/bio/b_print.c in OpenSSL improperly calculated string lengths, which allows remote attackers to cause a denial of service (overflow and out-of-bounds read) or possibly have unspecified other impact via a long string, as demonstrated by a large amount of ASN.1 data. (CVE-2016-0799 , Low) The doapr_outch function in crypto/bio/b_print.c in OpenSSL did not verify that a certain memory allocation succeeds, which allows remote attackers to cause a denial of service (out-of-bounds write or memory consumption) or possibly have unspecified other impact via a long string, as demonstrated by a large amount of ASN.1 data. (CVE-2016-2842 , Low) '(Updated on 2016-04-28: CVE-2016-2842 was fixed as part of this update but was previously not listed in this advisory.)'
    last seen 2019-02-21
    modified 2018-04-18
    plugin id 89842
    published 2016-03-11
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89842
    title Amazon Linux AMI : openssl (ALAS-2016-661) (DROWN) (SLOTH)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2016-C558E58B21.NASL
    description Update to latest openssl which fixes various CVE's Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2016-10-18
    plugin id 92158
    published 2016-07-14
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92158
    title Fedora 24 : mingw-openssl (2016-c558e58b21)
  • NASL family Web Servers
    NASL id OPENSSL_1_0_2G.NASL
    description According to its banner, the remote host is running a version of OpenSSL 1.0.2 prior to 1.0.2g. It is, therefore, affected by the following vulnerabilities : - A key disclosure vulnerability exists due to improper handling of cache-bank conflicts on the Intel Sandy-bridge microarchitecture. An attacker can exploit this to gain access to RSA key information. (CVE-2016-0702) - A double-free error exists due to improper validation of user-supplied input when parsing malformed DSA private keys. A remote attacker can exploit this to corrupt memory, resulting in a denial of service condition or the execution of arbitrary code. (CVE-2016-0705) - A NULL pointer dereference flaw exists in the BN_hex2bn() and BN_dec2bn() functions. A remote attacker can exploit this to trigger a heap corruption, resulting in the execution of arbitrary code. (CVE-2016-0797) - A denial of service vulnerability exists due to improper handling of invalid usernames. A remote attacker can exploit this, via a specially crafted username, to leak 300 bytes of memory per connection, exhausting available memory resources. (CVE-2016-0798) - Multiple memory corruption issues exist that allow a remote attacker to cause a denial of service condition or the execution of arbitrary code. (CVE-2016-0799) - A flaw exists that allows a cross-protocol Bleichenbacher padding oracle attack known as DROWN (Decrypting RSA with Obsolete and Weakened eNcryption). This vulnerability exists due to a flaw in the Secure Sockets Layer Version 2 (SSLv2) implementation, and it allows captured TLS traffic to be decrypted. A man-in-the-middle attacker can exploit this to decrypt the TLS connection by utilizing previously captured traffic and weak cryptography along with a series of specially crafted connections to an SSLv2 server that uses the same private key. (CVE-2016-0800)
    last seen 2019-02-21
    modified 2018-07-16
    plugin id 89082
    published 2016-03-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89082
    title OpenSSL 1.0.2 < 1.0.2g Multiple Vulnerabilities (DROWN)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2016-2802690366.NASL
    description New upstream release fixing security issues. Note that SSLv2 was already disabled by default in Fedora OpenSSL. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2016-10-18
    plugin id 89499
    published 2016-03-04
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89499
    title Fedora 23 : openssl-1.0.2g-2.fc23 (2016-2802690366)
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2016-0722.NASL
    description An update for openssl is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library. Security Fix(es) : * A flaw was found in the way OpenSSL encoded certain ASN.1 data structures. An attacker could use this flaw to create a specially crafted certificate which, when verified or re-encoded by OpenSSL, could cause it to crash, or execute arbitrary code using the permissions of the user running an application compiled against the OpenSSL library. (CVE-2016-2108) * Two integer overflow flaws, leading to buffer overflows, were found in the way the EVP_EncodeUpdate() and EVP_EncryptUpdate() functions of OpenSSL parsed very large amounts of input data. A remote attacker could use these flaws to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application. (CVE-2016-2105, CVE-2016-2106) * It was discovered that OpenSSL leaked timing information when decrypting TLS/SSL and DTLS protocol encrypted records when the connection used the AES CBC cipher suite and the server supported AES-NI. A remote attacker could possibly use this flaw to retrieve plain text from encrypted packets by using a TLS/SSL or DTLS server as a padding oracle. (CVE-2016-2107) * Several flaws were found in the way BIO_*printf functions were implemented in OpenSSL. Applications which passed large amounts of untrusted data through these functions could crash or potentially execute code with the permissions of the user running such an application. (CVE-2016-0799, CVE-2016-2842) * A denial of service flaw was found in the way OpenSSL parsed certain ASN.1-encoded data from BIO (OpenSSL's I/O abstraction) inputs. An application using OpenSSL that accepts untrusted ASN.1 BIO input could be forced to allocate an excessive amount of data. (CVE-2016-2109) Red Hat would like to thank the OpenSSL project for reporting CVE-2016-2108, CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, and CVE-2016-0799. Upstream acknowledges Huzaifa Sidhpurwala (Red Hat), Hanno Bock, and David Benjamin (Google) as the original reporters of CVE-2016-2108; Guido Vranken as the original reporter of CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, and CVE-2016-0799; and Juraj Somorovsky as the original reporter of CVE-2016-2107.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 91017
    published 2016-05-11
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91017
    title CentOS 7 : openssl (CESA-2016:0722)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-0678-1.NASL
    description OpenSSL was update to fix security issues and bugs : CVE-2016-0800 aka the 'DROWN' attack (bsc#968046): OpenSSL was vulnerable to a cross-protocol attack that could lead to decryption of TLS sessions by using a server supporting SSLv2 and EXPORT cipher suites as a Bleichenbacher RSA padding oracle. This update changes the OpenSSL library to : Disable SSLv2 protocol support by default. This can be overridden by setting the environment variable 'OPENSSL_ALLOW_SSL2' or by using SSL_CTX_clear_options using the SSL_OP_NO_SSLv2 flag. Note that various services and clients had already disabled SSL protocol 2 by default previously. Disable all weak EXPORT ciphers by default. These can be re-enabled if required by old legacy software using the environment variable 'OPENSSL_ALLOW_EXPORT'. CVE-2016-0797 (bsc#968048): The BN_hex2bn() and BN_dec2bn() functions had a bug that could result in an attempt to de-reference a NULL pointer leading to crashes. This could have security consequences if these functions were ever called by user applications with large untrusted hex/decimal data. Also, internal usage of these functions in OpenSSL uses data from config files or application command line arguments. If user developed applications generated config file data based on untrusted data, then this could have had security consequences as well. CVE-2016-0799 (bsc#968374): On many 64 bit systems, the internal fmtstr() and doapr_outch() functions could miscalculate the length of a string and attempt to access out-of-bounds memory locations. These problems could have enabled attacks where large amounts of untrusted data is passed to the BIO_*printf functions. If applications use these functions in this way then they could have been vulnerable. OpenSSL itself uses these functions when printing out human-readable dumps of ASN.1 data. Therefore applications that print this data could have been vulnerable if the data is from untrusted sources. OpenSSL command line applications could also have been vulnerable when they print out ASN.1 data, or if untrusted data is passed as command line arguments. Libssl is not considered directly vulnerable. CVE-2015-3197 (bsc#963415): The SSLv2 protocol did not block disabled ciphers. CVE-2015-3195 (bsc#957812): An X509_ATTRIBUTE memory leak was fixed. Fixed a regression caused by the openssl-CVE-2015-0287.patch (bsc#937492) Note that the March 1st 2016 release also references following CVEs that were fixed by us with CVE-2015-0293 in 2015 : CVE-2016-0703 (bsc#968051): This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. CVE-2016-0704 (bsc#968053): 'Bleichenbacher oracle in SSLv2' This issue only affected versions of OpenSSL prior to March 19th 2015 at which time the code was refactored to address vulnerability CVE-2015-0293. It would have made the above 'DROWN' attack much easier. Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-11-29
    plugin id 89731
    published 2016-03-08
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89731
    title SUSE SLES10 Security Update : OpenSSL (SUSE-SU-2016:0678-1) (DROWN)
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2016-3576.NASL
    description Description of changes: [0.9.8e-40.0.2] - CVE-2016-0799 - Fix memory issues in BIO_*printf functions - CVE-2016-2105 - Avoid overflow in EVP_EncodeUpdate - CVE-2016-2106 - Fix encrypt overflow - CVE-2016-2109 - Harden ASN.1 BIO handling of large amounts of data.
    last seen 2018-09-01
    modified 2016-10-19
    plugin id 91738
    published 2016-06-22
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91738
    title Oracle Linux 5 : openssl (ELSA-2016-3576)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2016-E6807B3394.NASL
    description New upstream release fixing security issues. Note that SSLv2 was already disabled by default in Fedora OpenSSL. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2016-10-18
    plugin id 89892
    published 2016-03-14
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89892
    title Fedora 22 : openssl-1.0.1k-14.fc22 (2016-e6807b3394)
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DSA-3500.NASL
    description Several vulnerabilities were discovered in OpenSSL, a Secure Socket Layer toolkit. - CVE-2016-0702 Yuval Yarom from the University of Adelaide and NICTA, Daniel Genkin from Technion and Tel Aviv University, and Nadia Heninger from the University of Pennsylvania discovered a side-channel attack which makes use of cache-bank conflicts on the Intel Sandy-Bridge microarchitecture. This could allow local attackers to recover RSA private keys. - CVE-2016-0705 Adam Langley from Google discovered a double free bug when parsing malformed DSA private keys. This could allow remote attackers to cause a denial of service or memory corruption in applications parsing DSA private keys received from untrusted sources. - CVE-2016-0797 Guido Vranken discovered an integer overflow in the BN_hex2bn and BN_dec2bn functions that can lead to a NULL pointer dereference and heap corruption. This could allow remote attackers to cause a denial of service or memory corruption in applications processing hex or dec data received from untrusted sources. - CVE-2016-0798 Emilia Kasper of the OpenSSL development team discovered a memory leak in the SRP database lookup code. To mitigate the memory leak, the seed handling in SRP_VBASE_get_by_user is now disabled even if the user has configured a seed. Applications are advised to migrate to the SRP_VBASE_get1_by_user function. - CVE-2016-0799, CVE-2016-2842 Guido Vranken discovered an integer overflow in the BIO_*printf functions that could lead to an OOB read when printing very long strings. Additionally the internal doapr_outch function can attempt to write to an arbitrary memory location in the event of a memory allocation failure. These issues will only occur on platforms where sizeof(size_t) > sizeof(int) like many 64 bit systems. This could allow remote attackers to cause a denial of service or memory corruption in applications that pass large amounts of untrusted data to the BIO_*printf functions. Additionally the EXPORT and LOW ciphers were disabled since thay could be used as part of the DROWN (CVE-2016-0800 ) and SLOTH (CVE-2015-7575 ) attacks, but note that the oldstable (wheezy) and stable (jessie) distributions are not affected by those attacks since the SSLv2 protocol has already been dropped in the openssl package version 1.0.0c-2.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 89061
    published 2016-03-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=89061
    title Debian DSA-3500-1 : openssl - security update
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2016-0996.NASL
    description An update for openssl is now available for Red Hat Enterprise Linux 6. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols, as well as a full-strength general-purpose cryptography library. Security Fix(es) : * A flaw was found in the way OpenSSL encoded certain ASN.1 data structures. An attacker could use this flaw to create a specially crafted certificate which, when verified or re-encoded by OpenSSL, could cause it to crash, or execute arbitrary code using the permissions of the user running an application compiled against the OpenSSL library. (CVE-2016-2108) * Two integer overflow flaws, leading to buffer overflows, were found in the way the EVP_EncodeUpdate() and EVP_EncryptUpdate() functions of OpenSSL parsed very large amounts of input data. A remote attacker could use these flaws to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application. (CVE-2016-2105, CVE-2016-2106) * It was discovered that OpenSSL leaked timing information when decrypting TLS/SSL and DTLS protocol encrypted records when the connection used the AES CBC cipher suite and the server supported AES-NI. A remote attacker could possibly use this flaw to retrieve plain text from encrypted packets by using a TLS/SSL or DTLS server as a padding oracle. (CVE-2016-2107) * Several flaws were found in the way BIO_*printf functions were implemented in OpenSSL. Applications which passed large amounts of untrusted data through these functions could crash or potentially execute code with the permissions of the user running such an application. (CVE-2016-0799, CVE-2016-2842) * A denial of service flaw was found in the way OpenSSL parsed certain ASN.1-encoded data from BIO (OpenSSL's I/O abstraction) inputs. An application using OpenSSL that accepts untrusted ASN.1 BIO input could be forced to allocate an excessive amount of data. (CVE-2016-2109) Red Hat would like to thank the OpenSSL project for reporting CVE-2016-2108, CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, CVE-2016-2107, and CVE-2016-0799. Upstream acknowledges Huzaifa Sidhpurwala (Red Hat), Hanno Böck, and David Benjamin (Google) as the original reporters of CVE-2016-2108; Guido Vranken as the original reporter of CVE-2016-2842, CVE-2016-2105, CVE-2016-2106, and CVE-2016-0799; and Juraj Somorovsky as the original reporter of CVE-2016-2107.
    last seen 2019-02-21
    modified 2018-07-02
    plugin id 91171
    published 2016-05-17
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91171
    title CentOS 6 : openssl (CESA-2016:0996)
packetstorm via4
data source https://packetstormsecurity.com/files/download/143369/orionbrowser79-mitm.txt
id PACKETSTORM:143369
last seen 2017-07-15
published 2017-07-14
reporter MaXe
source https://packetstormsecurity.com/files/143369/Orion-Elite-Hidden-IP-Browser-Pro-7.9-OpenSSL-Tor-Man-In-The-Middle.html
title Orion Elite Hidden IP Browser Pro 7.9 OpenSSL / Tor / Man-In-The-Middle
redhat via4
advisories
  • rhsa
    id RHSA-2016:0722
  • rhsa
    id RHSA-2016:0996
  • rhsa
    id RHSA-2016:2073
  • rhsa
    id RHSA-2016:2957
rpms
  • openssl-1:1.0.1e-51.el7_2.5
  • openssl-devel-1:1.0.1e-51.el7_2.5
  • openssl-libs-1:1.0.1e-51.el7_2.5
  • openssl-perl-1:1.0.1e-51.el7_2.5
  • openssl-static-1:1.0.1e-51.el7_2.5
  • openssl-0:1.0.1e-48.el6_8.1
  • openssl-devel-0:1.0.1e-48.el6_8.1
  • openssl-perl-0:1.0.1e-48.el6_8.1
  • openssl-static-0:1.0.1e-48.el6_8.1
refmap via4
bid
  • 83755
  • 91787
cisco 20160302 Multiple Vulnerabilities in OpenSSL Affecting Cisco Products: March 2016
confirm
debian DSA-3500
fedora
  • FEDORA-2016-2802690366
  • FEDORA-2016-e6807b3394
freebsd FreeBSD-SA-16:12
gentoo GLSA-201603-15
hp
  • HPSBGN03569
  • HPSBMU03575
sectrack 1035133
suse
  • SUSE-SU-2016:0617
  • SUSE-SU-2016:0620
  • SUSE-SU-2016:0621
  • SUSE-SU-2016:0624
  • SUSE-SU-2016:0631
  • SUSE-SU-2016:0641
  • SUSE-SU-2016:0678
  • SUSE-SU-2016:1057
  • openSUSE-SU-2016:0628
  • openSUSE-SU-2016:0637
  • openSUSE-SU-2016:0638
  • openSUSE-SU-2016:0640
  • openSUSE-SU-2016:0720
  • openSUSE-SU-2016:1239
  • openSUSE-SU-2016:1241
ubuntu USN-2914-1
Last major update 09-05-2017 - 21:29
Published 03-03-2016 - 15:59
Last modified 04-01-2018 - 21:30
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