ID CVE-2009-0021
Summary NTP 4.2.4 before 4.2.4p5 and 4.2.5 before 4.2.5p150 does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys, a similar vulnerability to CVE-2008-5077.
References
Vulnerable Configurations
  • NTP 4.2.0
    cpe:2.3:a:ntp:ntp:4.2.0
  • NTP 4.2.2
    cpe:2.3:a:ntp:ntp:4.2.2
  • cpe:2.3:a:ntp:ntp:4.2.4p1
    cpe:2.3:a:ntp:ntp:4.2.4p1
  • cpe:2.3:a:ntp:ntp:4.2.4p2
    cpe:2.3:a:ntp:ntp:4.2.4p2
  • cpe:2.3:a:ntp:ntp:4.2.4p3
    cpe:2.3:a:ntp:ntp:4.2.4p3
  • cpe:2.3:a:ntp:ntp:4.2.4p4
    cpe:2.3:a:ntp:ntp:4.2.4p4
CVSS
Base: 5.0 (as of 07-01-2009 - 14:42)
Impact:
Exploitability:
CWE CWE-287
CAPEC
  • Authentication Abuse
    An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker. This attack may exploit assumptions made by the target's authentication procedures, such as assumptions regarding trust relationships or assumptions regarding the generation of secret values. This attack differs from Authentication Bypass attacks in that Authentication Abuse allows the attacker to be certified as a valid user through illegitimate means, while Authentication Bypass allows the user to access protected material without ever being certified as an authenticated user. This attack does not rely on prior sessions established by successfully authenticating users, as relied upon for the "Exploitation of Session Variables, Resource IDs and other Trusted Credentials" attack patterns.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Utilizing REST's Trust in the System Resource to Register Man in the Middle
    This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to place man in the middle once SSL is terminated. Rest applications premise is that they leverage existing infrastructure to deliver web services functionality. An example of this is a Rest application that uses HTTP Get methods and receives a HTTP response with an XML document. These Rest style web services are deployed on existing infrastructure such as Apache and IIS web servers with no SOAP stack required. Unfortunately from a security standpoint, there frequently is no interoperable identity security mechanism deployed, so Rest developers often fall back to SSL to deliver security. In large data centers, SSL is typically terminated at the edge of the network - at the firewall, load balancer, or router. Once the SSL is terminated the HTTP request is in the clear (unless developers have hashed or encrypted the values, but this is rare). The attacker can utilize a sniffer such as Wireshark to snapshot the credentials, such as username and password that are passed in the clear once SSL is terminated. Once the attacker gathers these credentials, they can submit requests to the web service provider just as authorized user do. There is not typically an authentication on the client side, beyond what is passed in the request itself so once this is compromised, then this is generally sufficient to compromise the service's authentication scheme.
  • Man in the Middle Attack
    This type of attack targets the communication between two components (typically client and server). The attacker places himself in the communication channel between the two components. Whenever one component attempts to communicate with the other (data flow, authentication challenges, etc.), the data first goes to the attacker, who has the opportunity to observe or alter it, and it is then passed on to the other component as if it was never intercepted. This interposition is transparent leaving the two compromised components unaware of the potential corruption or leakage of their communications. The potential for Man-in-the-Middle attacks yields an implicit lack of trust in communication or identify between two components.
Access
VectorComplexityAuthentication
NETWORK LOW NONE
Impact
ConfidentialityIntegrityAvailability
PARTIAL NONE NONE
nessus via4
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2009-0004.NASL
    description From Red Hat Security Advisory 2009:0004 : Updated OpenSSL packages that correct a security issue are now available for Red Hat Enterprise Linux 2.1, 3, 4, and 5. This update has been rated as having important security impact by the Red Hat Security Response Team. OpenSSL is a toolkit that implements Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength, general purpose, cryptography library. The Google security team discovered a flaw in the way OpenSSL checked the verification of certificates. An attacker in control of a malicious server, or able to effect a 'man in the middle' attack, could present a malformed SSL/TLS signature from a certificate chain to a vulnerable client and bypass validation. (CVE-2008-5077) All OpenSSL users should upgrade to these updated packages, which contain backported patches to resolve these issues. For the update to take effect, all running OpenSSL client applications must be restarted, or the system rebooted.
    last seen 2019-01-16
    modified 2016-12-07
    plugin id 67783
    published 2013-07-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=67783
    title Oracle Linux 3 / 4 / 5 : openssl (ELSA-2009-0004)
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DSA-1701.NASL
    description It was discovered that OpenSSL does not properly verify DSA signatures on X.509 certificates due to an API misuse, potentially leading to the acceptance of incorrect X.509 certificates as genuine (CVE-2008-5077 ).
    last seen 2019-01-16
    modified 2018-11-10
    plugin id 35364
    published 2009-01-14
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=35364
    title Debian DSA-1701-1 : openssl, openssl097 - interpretation conflict
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2009-0004.NASL
    description Updated OpenSSL packages that correct a security issue are now available for Red Hat Enterprise Linux 2.1, 3, 4, and 5. This update has been rated as having important security impact by the Red Hat Security Response Team. OpenSSL is a toolkit that implements Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength, general purpose, cryptography library. The Google security team discovered a flaw in the way OpenSSL checked the verification of certificates. An attacker in control of a malicious server, or able to effect a 'man in the middle' attack, could present a malformed SSL/TLS signature from a certificate chain to a vulnerable client and bypass validation. (CVE-2008-5077) All OpenSSL users should upgrade to these updated packages, which contain backported patches to resolve these issues. For the update to take effect, all running OpenSSL client applications must be restarted, or the system rebooted.
    last seen 2019-01-16
    modified 2018-11-27
    plugin id 35316
    published 2009-01-08
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=35316
    title RHEL 2.1 / 3 / 4 / 5 : openssl (RHSA-2009:0004)
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2009-0046.NASL
    description Updated ntp packages to correct a security issue are now available for Red Hat Enterprise Linux 4 and 5. This update has been rated as having moderate security impact by the Red Hat Security Response Team. The Network Time Protocol (NTP) is used to synchronize a computer's time with a referenced time source. A flaw was discovered in the way the ntpd daemon checked the return value of the OpenSSL EVP_VerifyFinal function. On systems using NTPv4 authentication, this could lead to an incorrect verification of cryptographic signatures, allowing time-spoofing attacks. (CVE-2009-0021) Note: This issue only affects systems that have enabled NTP authentication. By default, NTP authentication is not enabled. All ntp users are advised to upgrade to the updated packages, which contain a backported patch to resolve this issue. After installing the update, the ntpd daemon will restart automatically.
    last seen 2019-01-16
    modified 2018-11-28
    plugin id 43728
    published 2010-01-06
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=43728
    title CentOS 4 / 5 : ntp (CESA-2009:0046)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_11_1_NTP-090119.NASL
    description This update of ntp improves a check for the return value of openssl's function EVP_VerifyFinal(). (CVE-2009-0021)
    last seen 2019-01-16
    modified 2014-06-13
    plugin id 40284
    published 2009-07-21
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=40284
    title openSUSE Security Update : ntp (ntp-439)
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2009-0020.NASL
    description From Red Hat Security Advisory 2009:0020 : Updated Bind packages to correct a security issue are now available for Red Hat Enterprise Linux 2.1, 3, 4, and 5. This update has been rated as having moderate security impact by the Red Hat Security Response Team. BIND (Berkeley Internet Name Domain) is an implementation of the DNS (Domain Name System) protocols. A flaw was discovered in the way BIND checked the return value of the OpenSSL DSA_do_verify function. On systems using DNSSEC, a malicious zone could present a malformed DSA certificate and bypass proper certificate validation, allowing spoofing attacks. (CVE-2009-0025) For users of Red Hat Enterprise Linux 3 this update also addresses a bug which can cause BIND to occasionally exit with an assertion failure. All BIND users are advised to upgrade to the updated package, which contains a backported patch to resolve this issue. After installing the update, BIND daemon will be restarted automatically.
    last seen 2019-01-16
    modified 2019-01-02
    plugin id 67792
    published 2013-07-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=67792
    title Oracle Linux 3 / 4 / 5 : bind (ELSA-2009-0020)
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2009-0046.NASL
    description From Red Hat Security Advisory 2009:0046 : Updated ntp packages to correct a security issue are now available for Red Hat Enterprise Linux 4 and 5. This update has been rated as having moderate security impact by the Red Hat Security Response Team. The Network Time Protocol (NTP) is used to synchronize a computer's time with a referenced time source. A flaw was discovered in the way the ntpd daemon checked the return value of the OpenSSL EVP_VerifyFinal function. On systems using NTPv4 authentication, this could lead to an incorrect verification of cryptographic signatures, allowing time-spoofing attacks. (CVE-2009-0021) Note: This issue only affects systems that have enabled NTP authentication. By default, NTP authentication is not enabled. All ntp users are advised to upgrade to the updated packages, which contain a backported patch to resolve this issue. After installing the update, the ntpd daemon will restart automatically.
    last seen 2019-01-16
    modified 2019-01-02
    plugin id 67793
    published 2013-07-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=67793
    title Oracle Linux 4 / 5 : ntp (ELSA-2009-0046)
  • NASL family MacOS X Local Security Checks
    NASL id MACOSX_SECUPD2009-002.NASL
    description The remote host is running a version of Mac OS X 10.4 that does not have Security Update 2009-002 applied. This security update contains fixes for the following products : - Apache - ATS - BIND - CoreGraphics - Cscope - CUPS - Disk Images - enscript - Flash Player plug-in - Help Viewer - IPSec - Kerberos - Launch Services - libxml - Net-SNMP - Network Time - OpenSSL - QuickDraw Manager - Spotlight - system_cmds - telnet - Terminal - X11
    last seen 2019-01-16
    modified 2018-07-14
    plugin id 38743
    published 2009-05-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=38743
    title Mac OS X Multiple Vulnerabilities (Security Update 2009-002)
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2009-0004.NASL
    description Updated OpenSSL packages that correct a security issue are now available for Red Hat Enterprise Linux 2.1, 3, 4, and 5. This update has been rated as having important security impact by the Red Hat Security Response Team. OpenSSL is a toolkit that implements Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength, general purpose, cryptography library. The Google security team discovered a flaw in the way OpenSSL checked the verification of certificates. An attacker in control of a malicious server, or able to effect a 'man in the middle' attack, could present a malformed SSL/TLS signature from a certificate chain to a vulnerable client and bypass validation. (CVE-2008-5077) All OpenSSL users should upgrade to these updated packages, which contain backported patches to resolve these issues. For the update to take effect, all running OpenSSL client applications must be restarted, or the system rebooted.
    last seen 2019-01-16
    modified 2018-11-10
    plugin id 35310
    published 2009-01-08
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=35310
    title CentOS 3 / 4 / 5 : openssl (CESA-2009:0004)
  • NASL family Ubuntu Local Security Checks
    NASL id UBUNTU_USN-705-1.NASL
    description It was discovered that NTP did not properly perform signature verification. A remote attacker could exploit this to bypass certificate validation via a malformed SSL/TLS signature. 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 2019-01-16
    modified 2018-11-23
    plugin id 37876
    published 2009-04-23
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=37876
    title Ubuntu 6.06 LTS / 7.10 / 8.04 LTS / 8.10 : ntp vulnerability (USN-705-1)
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2015-0001.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : - Remove default ntp servers in ntp.conf [bug 14342986] - don't generate weak control key for resolver (CVE-2014-9293) - don't generate weak MD5 keys in ntp-keygen (CVE-2014-9294) - fix buffer overflows via specially-crafted packets (CVE-2014-9295) - increase memlock limit again (#1035198) - allow selection of cipher for private key files (#741573) - revert init script priority (#470945, #689636) - drop tentative patch (#489835) - move restorecon call to %posttrans - call restorecon on ntpd and ntpdate on start (#470945) - don't crash with more than 512 local addresses (#661934) - add -I option (#528799) - fix -L option to not require argument (#460434) - move ntpd and ntpdate to /sbin and start earlier on boot (#470945, #689636) - increase memlock limit (#575874) - ignore tentative addresses (#489835) - print synchronization distance instead of dispersion in ntpstat (#679034) - fix typos in ntpq and ntp-keygen man pages (#664524, #664525) - clarify ntpd -q description (#591838) - don't verify ntp.conf (#481151) - replace Prereq tag - fix DoS with mode 7 packets (#532640, CVE-2009-3563) - compile with -fno-strict-aliasing - fix buffer overflow when parsing Autokey association message (#500784, CVE-2009-1252) - fix buffer overflow in ntpq (#500784, CVE-2009-0159) - fix check for malformed signatures (#479699, CVE-2009-0021)
    last seen 2019-01-16
    modified 2018-07-24
    plugin id 80394
    published 2015-01-07
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=80394
    title OracleVM 3.2 : ntp (OVMSA-2015-0001)
  • NASL family Ubuntu Local Security Checks
    NASL id UBUNTU_USN-706-1.NASL
    description It was discovered that Bind did not properly perform signature verification. When DNSSEC with DSA signatures are in use, a remote attacker could exploit this to bypass signature validation to spoof DNS entries and poison DNS caches. Among other things, this could lead to misdirected email and web traffic. 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 2019-01-16
    modified 2018-11-28
    plugin id 36220
    published 2009-04-23
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=36220
    title Ubuntu 6.06 LTS / 7.10 / 8.04 LTS / 8.10 : bind9 vulnerability (USN-706-1)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20090129_NTP_ON_SL4_X.NASL
    description A flaw was discovered in the way the ntpd daemon checked the return value of the OpenSSL EVP_VerifyFinal function. On systems using NTPv4 authentication, this could lead to an incorrect verification of cryptographic signatures, allowing time-spoofing attacks. (CVE-2009-0021) Note: This issue only affects systems that have enabled NTP authentication. By default, NTP authentication is not enabled. After installing the update, the ntpd daemon will restart automatically.
    last seen 2019-01-16
    modified 2019-01-02
    plugin id 60526
    published 2012-08-01
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=60526
    title Scientific Linux Security Update : ntp on SL4.x, SL5.x i386/x86_64
  • NASL family VMware ESX Local Security Checks
    NASL id VMWARE_VMSA-2009-0004.NASL
    description a. Updated OpenSSL package for the Service Console fixes a security issue. OpenSSL 0.9.7a-33.24 and earlier does not properly check the return value from the EVP_VerifyFinal function, which could allow a remote attacker to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2008-5077 to this issue. b. Update bind package for the Service Console fixes a security issue. A flaw was discovered in the way Berkeley Internet Name Domain (BIND) checked the return value of the OpenSSL DSA_do_verify function. On systems using DNSSEC, a malicious zone could present a malformed DSA certificate and bypass proper certificate validation, allowing spoofing attacks. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2009-0025 to this issue. c. Updated vim package for the Service Console addresses several security issues. Several input flaws were found in Visual editor IMproved's (Vim) keyword and tag handling. If Vim looked up a document's maliciously crafted tag or keyword, it was possible to execute arbitrary code as the user running Vim. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2008-4101 to this issue. A heap-based overflow flaw was discovered in Vim's expansion of file name patterns with shell wildcards. An attacker could create a specially crafted file or directory name, when opened by Vim causes the application to stop responding or execute arbitrary code. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2008-3432 to this issue. Several input flaws were found in various Vim system functions. If a user opened a specially crafted file, it was possible to execute arbitrary code as the user running Vim. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2008-2712 to this issue. A format string flaw was discovered in Vim's help tag processor. If a user was tricked into executing the 'helptags' command on malicious data, arbitrary code could be executed with the permissions of the user running VIM. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2007-2953 to this issue.
    last seen 2019-01-16
    modified 2018-08-06
    plugin id 40389
    published 2009-07-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=40389
    title VMSA-2009-0004 : ESX Service Console updates for openssl, bind, and vim
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2009-0547.NASL
    description This update fixes CVE-2009-0021: NTP 4.2.4 before 4.2.4p5 and 4.2.5 before 4.2.5p150 does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys, a similar vulnerability to CVE-2008-5077. 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 2019-01-16
    modified 2018-11-28
    plugin id 35455
    published 2009-01-26
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=35455
    title Fedora 9 : ntp-4.2.4p6-1.fc9 (2009-0547)
  • NASL family Solaris Local Security Checks
    NASL id SOLARIS10_X86_139501.NASL
    description SunOS 5.10_x86: openssl patch. Date this patch was last updated by Sun : Feb/24/09
    last seen 2018-09-02
    modified 2018-08-13
    plugin id 36555
    published 2009-04-23
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=36555
    title Solaris 10 (x86) : 139501-02
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2009-0011.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : CVE-2009-0159 Stack-based buffer overflow in the cookedprint function in ntpq/ntpq.c in ntpq in NTP before 4.2.4p7-RC2 allows remote NTP servers to execute arbitrary code via a crafted response. CVE-2009-1252 Stack-based buffer overflow in the crypto_recv function in ntp_crypto.c in ntpd in NTP before 4.2.4p7 and 4.2.5 before 4.2.5p74, when OpenSSL and autokey are enabled, allows remote attackers to execute arbitrary code via a crafted packet containing an extension field. CVE-2009-0021 NTP 4.2.4 before 4.2.4p5 and 4.2.5 before 4.2.5p150 does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys, a similar vulnerability to CVE-2008-5077. - fix buffer overflow when parsing Autokey association message (#500783, CVE-2009-1252) - fix buffer overflow in ntpq (#500783, CVE-2009-0159) - fix check for malformed signatures (#479698, CVE-2009-0021) - fix selecting multicast interface (#444106) - disable kernel discipline when -x option is used (#431729) - avoid use of uninitialized floating-point values in clock_select (#250838) - generate man pages from html source, include config man pages (#307271) - add note about paths and exit codes to ntpd man page (#242925, #246568) - add section about exit codes to ntpd man page (#319591) - always return 0 in scriptlets - pass additional options to ntpdate (#240141) - fix broadcast client to accept broadcasts on 255.255.255.255 (#226958) - compile with crypto support on 64bit architectures (#239580) - add ncurses-devel to buildrequires (#239580) - exit with nonzero code if ntpd -q did not set clock (#240134) - fix return codes in init script (#240118)
    last seen 2019-01-16
    modified 2018-07-24
    plugin id 79458
    published 2014-11-26
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=79458
    title OracleVM 2.1 : ntp (OVMSA-2009-0011)
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2015-0002.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : - don't generate weak control key for resolver (CVE-2014-9293) - don't generate weak MD5 keys in ntp-keygen (CVE-2014-9294) - fix buffer overflows via specially-crafted packets (CVE-2014-9295) - increase memlock limit again (#1035198) - allow selection of cipher for private key files (#741573) - revert init script priority (#470945, #689636) - drop tentative patch (#489835) - move restorecon call to %posttrans - call restorecon on ntpd and ntpdate on start (#470945) - don't crash with more than 512 local addresses (#661934) - add -I option (#528799) - fix -L option to not require argument (#460434) - move ntpd and ntpdate to /sbin and start earlier on boot (#470945, #689636) - increase memlock limit (#575874) - ignore tentative addresses (#489835) - print synchronization distance instead of dispersion in ntpstat (#679034) - fix typos in ntpq and ntp-keygen man pages (#664524, #664525) - clarify ntpd -q description (#591838) - don't verify ntp.conf (#481151) - replace Prereq tag - fix DoS with mode 7 packets (#532640, CVE-2009-3563) - compile with -fno-strict-aliasing - fix buffer overflow when parsing Autokey association message (#500784, CVE-2009-1252) - fix buffer overflow in ntpq (#500784, CVE-2009-0159) - fix check for malformed signatures (#479699, CVE-2009-0021)
    last seen 2019-01-16
    modified 2018-07-24
    plugin id 80395
    published 2015-01-07
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=80395
    title OracleVM 2.2 : ntp (OVMSA-2015-0002)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_XNTP-5936.NASL
    description This update of ntp improves a check for the return value of openssl's function EVP_VerifyFinal(). (CVE-2009-0021)
    last seen 2019-01-16
    modified 2014-06-13
    plugin id 35723
    published 2009-02-20
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=35723
    title openSUSE 10 Security Update : xntp (xntp-5936)
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2009-0020.NASL
    description Updated Bind packages to correct a security issue are now available for Red Hat Enterprise Linux 2.1, 3, 4, and 5. This update has been rated as having moderate security impact by the Red Hat Security Response Team. BIND (Berkeley Internet Name Domain) is an implementation of the DNS (Domain Name System) protocols. A flaw was discovered in the way BIND checked the return value of the OpenSSL DSA_do_verify function. On systems using DNSSEC, a malicious zone could present a malformed DSA certificate and bypass proper certificate validation, allowing spoofing attacks. (CVE-2009-0025) For users of Red Hat Enterprise Linux 3 this update also addresses a bug which can cause BIND to occasionally exit with an assertion failure. All BIND users are advised to upgrade to the updated package, which contains a backported patch to resolve this issue. After installing the update, BIND daemon will be restarted automatically.
    last seen 2019-01-16
    modified 2018-11-28
    plugin id 35589
    published 2009-02-05
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=35589
    title CentOS 3 / 4 / 5 : bind (CESA-2009:0020)
  • NASL family MacOS X Local Security Checks
    NASL id MACOSX_10_5_7.NASL
    description The remote host is running a version of Mac OS X 10.5.x that is prior to 10.5.7. Mac OS X 10.5.7 contains security fixes for the following products : - Apache - ATS - BIND - CFNetwork - CoreGraphics - Cscope - CUPS - Disk Images - enscript - Flash Player plug-in - Help Viewer - iChat - International Components for Unicode - IPSec - Kerberos - Kernel - Launch Services - libxml - Net-SNMP - Network Time - Networking - OpenSSL - PHP - QuickDraw Manager - ruby - Safari - Spotlight - system_cmds - telnet - Terminal - WebKit - X11
    last seen 2019-01-16
    modified 2018-07-14
    plugin id 38744
    published 2009-05-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=38744
    title Mac OS X 10.5.x < 10.5.7 Multiple Vulnerabilities
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2009-0046.NASL
    description Updated ntp packages to correct a security issue are now available for Red Hat Enterprise Linux 4 and 5. This update has been rated as having moderate security impact by the Red Hat Security Response Team. The Network Time Protocol (NTP) is used to synchronize a computer's time with a referenced time source. A flaw was discovered in the way the ntpd daemon checked the return value of the OpenSSL EVP_VerifyFinal function. On systems using NTPv4 authentication, this could lead to an incorrect verification of cryptographic signatures, allowing time-spoofing attacks. (CVE-2009-0021) Note: This issue only affects systems that have enabled NTP authentication. By default, NTP authentication is not enabled. All ntp users are advised to upgrade to the updated packages, which contain a backported patch to resolve this issue. After installing the update, the ntpd daemon will restart automatically.
    last seen 2019-01-16
    modified 2019-01-02
    plugin id 35551
    published 2009-01-29
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=35551
    title RHEL 4 / 5 : ntp (RHSA-2009:0046)
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DSA-1702.NASL
    description It has been discovered that NTP, an implementation of the Network Time Protocol, does not properly check the result of an OpenSSL function for verifying cryptographic signatures, which may ultimately lead to the acceptance of unauthenticated time information. (Note that cryptographic authentication of time servers is often not enabled in the first place.)
    last seen 2019-01-16
    modified 2018-11-10
    plugin id 35365
    published 2009-01-14
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=35365
    title Debian DSA-1702-1 : ntp - interpretation conflict
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2009-0020.NASL
    description Updated Bind packages to correct a security issue are now available for Red Hat Enterprise Linux 2.1, 3, 4, and 5. This update has been rated as having moderate security impact by the Red Hat Security Response Team. BIND (Berkeley Internet Name Domain) is an implementation of the DNS (Domain Name System) protocols. A flaw was discovered in the way BIND checked the return value of the OpenSSL DSA_do_verify function. On systems using DNSSEC, a malicious zone could present a malformed DSA certificate and bypass proper certificate validation, allowing spoofing attacks. (CVE-2009-0025) For users of Red Hat Enterprise Linux 3 this update also addresses a bug which can cause BIND to occasionally exit with an assertion failure. All BIND users are advised to upgrade to the updated package, which contains a backported patch to resolve this issue. After installing the update, BIND daemon will be restarted automatically.
    last seen 2019-01-16
    modified 2019-01-02
    plugin id 35324
    published 2009-01-09
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=35324
    title RHEL 2.1 / 3 / 4 / 5 : bind (RHSA-2009:0020)
  • NASL family Solaris Local Security Checks
    NASL id SOLARIS10_139500.NASL
    description SunOS 5.10: openssl patch. Date this patch was last updated by Sun : Apr/01/09
    last seen 2018-09-01
    modified 2018-08-13
    plugin id 38118
    published 2009-04-23
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=38118
    title Solaris 10 (sparc) : 139500-04
  • NASL family SuSE Local Security Checks
    NASL id SUSE_XNTP-6072.NASL
    description ntp didn't properly check the return value of the openssl function EVP_VerifyFinal. (CVE-2009-0021) Additionally a problem where ntpd refused to use keys from /etc/ntp.keys has been fixed.
    last seen 2019-01-16
    modified 2012-05-17
    plugin id 41600
    published 2009-09-24
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=41600
    title SuSE 10 Security Update : xntp (ZYPP Patch Number 6072)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2009-0544.NASL
    description This update fixes CVE-2009-0021: NTP 4.2.4 before 4.2.4p5 and 4.2.5 before 4.2.5p150 does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys, a similar vulnerability to CVE-2008-5077. 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 2019-01-16
    modified 2015-10-21
    plugin id 36222
    published 2009-04-23
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=36222
    title Fedora 10 : ntp-4.2.4p6-1.fc10 (2009-0544)
  • NASL family Gentoo Local Security Checks
    NASL id GENTOO_GLSA-200904-05.NASL
    description The remote host is affected by the vulnerability described in GLSA-200904-05 (ntp: Certificate validation error) It has been reported that ntp incorrectly checks the return value of the EVP_VerifyFinal(), a vulnerability related to CVE-2008-5077 (GLSA 200902-02). Impact : A remote attacker could exploit this vulnerability to spoof arbitrary names to conduct Man-In-The-Middle attacks and intercept sensitive information. Workaround : There is no known workaround at this time.
    last seen 2019-01-16
    modified 2018-11-14
    plugin id 36093
    published 2009-04-07
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=36093
    title GLSA-200904-05 : ntp: Certificate validation error
  • NASL family Solaris Local Security Checks
    NASL id SOLARIS10_X86_139501-02.NASL
    description SunOS 5.10_x86: openssl patch. Date this patch was last updated by Sun : Feb/24/09
    last seen 2019-01-19
    modified 2019-01-18
    plugin id 108014
    published 2018-03-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=108014
    title Solaris 10 (x86) : 139501-02
  • NASL family Slackware Local Security Checks
    NASL id SLACKWARE_SSA_2009-014-03.NASL
    description New ntp packages are available for Slackware 8.1, 9.0, 9.1, 10.0, 10.1, 10.2, 11.0, 12.0, 12.1, 12.2, and -current to a fix security issue.
    last seen 2019-01-16
    modified 2018-12-18
    plugin id 35377
    published 2009-01-15
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=35377
    title Slackware 10.0 / 10.1 / 10.2 / 11.0 / 12.0 / 12.1 / 12.2 / 8.1 / 9.0 / 9.1 / current : ntp (SSA:2009-014-03)
  • NASL family Mandriva Local Security Checks
    NASL id MANDRIVA_MDVSA-2009-007.NASL
    description A flaw was found in how NTP checked the return value of signature verification. A remote attacker could use this to bypass certificate validation by using a malformed SSL/TLS signature (CVE-2009-0021). The updated packages have been patched to prevent this issue.
    last seen 2019-01-16
    modified 2018-07-19
    plugin id 36723
    published 2009-04-23
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=36723
    title Mandriva Linux Security Advisory : ntp (MDVSA-2009:007)
  • NASL family SuSE Local Security Checks
    NASL id SUSE9_12338.NASL
    description This update of ntp improves a check for the return value of openssl's function EVP_VerifyFinal(). (CVE-2009-0021) Additionally a fix (non-security) for starting ntpd with the option -x was added.
    last seen 2019-01-16
    modified 2012-04-23
    plugin id 41269
    published 2009-09-24
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=41269
    title SuSE9 Security Update : xntp, xntp-doc (YOU Patch Number 12338)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_11_0_NTP-090119.NASL
    description This update of ntp improves a check for the return value of openssl's function EVP_VerifyFinal(). (CVE-2009-0021)
    last seen 2019-01-16
    modified 2014-06-13
    plugin id 40082
    published 2009-07-21
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=40082
    title openSUSE Security Update : ntp (ntp-439)
oval via4
accepted 2013-04-29T04:00:43.465-04:00
class vulnerability
contributors
  • name Aharon Chernin
    organization SCAP.com, LLC
  • name Dragos Prisaca
    organization G2, Inc.
definition_extensions
  • comment The operating system installed on the system is Red Hat Enterprise Linux 4
    oval oval:org.mitre.oval:def:11831
  • comment CentOS Linux 4.x
    oval oval:org.mitre.oval:def:16636
  • comment Oracle Linux 4.x
    oval oval:org.mitre.oval:def:15990
  • comment The operating system installed on the system is Red Hat Enterprise Linux 5
    oval oval:org.mitre.oval:def:11414
  • comment The operating system installed on the system is CentOS Linux 5.x
    oval oval:org.mitre.oval:def:15802
  • comment Oracle Linux 5.x
    oval oval:org.mitre.oval:def:15459
description NTP 4.2.4 before 4.2.4p5 and 4.2.5 before 4.2.5p150 does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys, a similar vulnerability to CVE-2008-5077.
family unix
id oval:org.mitre.oval:def:10035
status accepted
submitted 2010-07-09T03:56:16-04:00
title NTP 4.2.4 before 4.2.4p5 and 4.2.5 before 4.2.5p150 does not properly check the return value from the OpenSSL EVP_VerifyFinal function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys, a similar vulnerability to CVE-2008-5077.
version 24
redhat via4
advisories
bugzilla
id 476807
title CVE-2009-0021 ntp incorrectly checks for malformed signatures
oval
OR
  • AND
    • comment Red Hat Enterprise Linux 4 is installed
      oval oval:com.redhat.rhsa:tst:20060016001
    • comment ntp is earlier than 0:4.2.0.a.20040617-8.el4_7.1
      oval oval:com.redhat.rhsa:tst:20090046002
    • comment ntp is signed with Red Hat master key
      oval oval:com.redhat.rhsa:tst:20090046003
  • AND
    • comment Red Hat Enterprise Linux 5 is installed
      oval oval:com.redhat.rhsa:tst:20070055001
    • comment ntp is earlier than 0:4.2.2p1-9.el5_3.1
      oval oval:com.redhat.rhsa:tst:20090046005
    • comment ntp is signed with Red Hat redhatrelease key
      oval oval:com.redhat.rhsa:tst:20090046006
rhsa
id RHSA-2009:0046
released 2009-01-29
severity Moderate
title RHSA-2009:0046: ntp security update (Moderate)
rpms
  • ntp-0:4.2.0.a.20040617-8.el4_7.1
  • ntp-0:4.2.2p1-9.el5_3.1
refmap via4
apple APPLE-SA-2009-05-12
bugtraq 20090107 [oCERT-2008-016] Multiple OpenSSL signature verification API misuses
cert TA09-133A
confirm http://support.apple.com/kb/HT3549
misc http://www.ocert.org/advisories/ocert-2008-016.html
mlist [announce] 20090108 NTP 4.2.4p6 Released
sectrack 1021533
secunia
  • 33406
  • 33558
  • 33648
  • 34642
  • 35074
slackware SSA:2009-014-03
suse
  • SUSE-SR:2009:005
  • SUSE-SR:2009:008
vupen
  • ADV-2009-0042
  • ADV-2009-1297
Last major update 30-10-2012 - 23:13
Published 07-01-2009 - 12:30
Last modified 11-10-2018 - 16:58
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