ID CVE-2016-1549
Summary A malicious authenticated peer can create arbitrarily-many ephemeral associations in order to win the clock selection algorithm in ntpd in NTP 4.2.8p4 and earlier and NTPsec 3e160db8dc248a0bcb053b56a80167dc742d2b74 and a5fb34b9cc89b92a8fef2f459004865c93bb7f92 and modify a victim's clock.
References
Vulnerable Configurations
  • NTP 4.2.8 Patch 4
    cpe:2.3:a:ntp:ntp:4.2.8:p4
CVSS
Base: 4.0 (as of 09-01-2017 - 14:27)
Impact:
Exploitability:
CWE CWE-19
CAPEC
  • 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.
  • XML Nested Payloads
    Applications often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. By nesting XML data and causing this data to be continuously self-referential, an attacker can cause the XML parser to consume more resources while processing, causing excessive memory consumption and CPU utilization. An attacker's goal is to leverage parser failure to his or her advantage. In most cases this type of an attack will result in a denial of service due to an application becoming unstable, freezing, or crash. However it may be possible to cause a crash resulting in arbitrary code execution, leading to a jump from the data plane to the control plane [R.230.1].
  • XML Oversized Payloads
    Applications often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. By supplying oversized payloads in input vectors that will be processed by the XML parser, an attacker can cause the XML parser to consume more resources while processing, causing excessive memory consumption and CPU utilization, and potentially cause execution of arbitrary code. An attacker's goal is to leverage parser failure to his or her advantage. In many cases this type of an attack will result in a denial of service due to an application becoming unstable, freezing, or crash. However it is possible to cause a crash resulting in arbitrary code execution, leading to a jump from the data plane to the control plane [R.231.1].
  • XML Client-Side Attack
    Client applications such as web browsers that process HTML data often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. These adverse effects may include the parser crashing, consuming too much of a resource, executing too slowly, executing code supplied by an attacker, allowing usage of unintended system functionality, etc. An attacker's goal is to leverage parser failure to his or her advantage. In some cases it may be possible to jump from the data plane to the control plane via bad data being passed to an XML parser. [R.484.1]
  • XML Parser Attack
    Applications often need to transform data in and out of the XML format by using an XML parser. It may be possible for an attacker to inject data that may have an adverse effect on the XML parser when it is being processed. These adverse effects may include the parser crashing, consuming too much of a resource, executing too slowly, executing code supplied by an attacker, allowing usage of unintended system functionality, etc. An attacker's goal is to leverage parser failure to his or her advantage. In some cases it may be possible to jump from the data plane to the control plane via bad data being passed to an XML parser. [R.99.1]
Access
VectorComplexityAuthentication
NETWORK LOW SINGLE_INSTANCE
Impact
ConfidentialityIntegrityAvailability
NONE PARTIAL NONE
nessus via4
  • NASL family Junos Local Security Checks
    NASL id JUNIPER_SPACE_JSA_10826.NASL
    description According to its self-reported version number, the version of Junos Space running on the remote device is < 17.1R1, and is therefore affected by multiple vulnerabilities.
    last seen 2019-02-21
    modified 2018-07-13
    plugin id 104100
    published 2017-10-23
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=104100
    title Juniper Junos Space < 17.1R1 Multiple Vulnerabilities (JSA10826)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-1568-1.NASL
    description ntp was updated to version 4.2.8p8 to fix 17 security issues. These security issues were fixed : - CVE-2016-4956: Broadcast interleave (bsc#982068). - CVE-2016-2518: Crafted addpeer with hmode > 7 causes array wraparound with MATCH_ASSOC (bsc#977457). - CVE-2016-2519: ctl_getitem() return value not always checked (bsc#977458). - CVE-2016-4954: Processing spoofed server packets (bsc#982066). - CVE-2016-4955: Autokey association reset (bsc#982067). - CVE-2015-7974: NTP did not verify peer associations of symmetric keys when authenticating packets, which might allowed remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a 'skeleton key (bsc#962960). - CVE-2016-4957: CRYPTO_NAK crash (bsc#982064). - CVE-2016-2516: Duplicate IPs on unconfig directives will cause an assertion botch (bsc#977452). - CVE-2016-2517: Remote configuration trustedkey/requestkey values are not properly validated (bsc#977455). - CVE-2016-4953: Bad authentication demobilizes ephemeral associations (bsc#982065). - CVE-2016-1547: CRYPTO-NAK DoS (bsc#977459). - CVE-2016-1551: Refclock impersonation vulnerability, AKA: refclock-peering (bsc#977450). - CVE-2016-1550: Improve NTP security against buffer comparison timing attacks, authdecrypt-timing, AKA: authdecrypt-timing (bsc#977464). - CVE-2016-1548: Interleave-pivot - MITIGATION ONLY (bsc#977461). - CVE-2016-1549: Sybil vulnerability: ephemeral association attack, AKA: ntp-sybil - MITIGATION ONLY (bsc#977451). This release also contained improved patches for CVE-2015-7704, CVE-2015-7705, CVE-2015-7974. The update package also includes non-security fixes. See advisory for details. 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 91663
    published 2016-06-17
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91663
    title SUSE SLED12 / SLES12 Security Update : ntp (SUSE-SU-2016:1568-1)
  • NASL family Gentoo Local Security Checks
    NASL id GENTOO_GLSA-201607-15.NASL
    description The remote host is affected by the vulnerability described in GLSA-201607-15 (NTP: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in NTP. Please review the CVE identifiers referenced below for details. Impact : A remote attacker could possibly cause a Denial of Service condition. Workaround : There is no known workaround at this time.
    last seen 2019-02-21
    modified 2018-01-26
    plugin id 92485
    published 2016-07-21
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=92485
    title GLSA-201607-15 : NTP: Multiple vulnerabilities
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2016-649.NASL
    description This update for ntp fixes the following issues : - Update to 4.2.8p7 (boo#977446) : - CVE-2016-1547, boo#977459: Validate crypto-NAKs, AKA: CRYPTO-NAK DoS. - CVE-2016-1548, boo#977461: Interleave-pivot - CVE-2016-1549, boo#977451: Sybil vulnerability: ephemeral association attack. - CVE-2016-1550, boo#977464: Improve NTP security against buffer comparison timing attacks. - CVE-2016-1551, boo#977450: Refclock impersonation vulnerability - CVE-2016-2516, boo#977452: Duplicate IPs on unconfig directives will cause an assertion botch in ntpd. - CVE-2016-2517, boo#977455: remote configuration trustedkey/ requestkey/controlkey values are not properly validated. - CVE-2016-2518, boo#977457: Crafted addpeer with hmode > 7 causes array wraparound with MATCH_ASSOC. - CVE-2016-2519, boo#977458: ctl_getitem() return value not always checked. - integrate ntp-fork.patch - Improve the fixes for: CVE-2015-7704, CVE-2015-7705, CVE-2015-7974 - Restrict the parser in the startup script to the first occurrance of 'keys' and 'controlkey' in ntp.conf (boo#957226). - Enable compile-time support for MS-SNTP (--enable-ntp-signd). This replaces the w32 patches in 4.2.4 that added the authreg directive. (fate#320758). - Fix ntp-sntp-dst.patch (boo#975496). - Call /usr/sbin/sntp with full path to synchronize in start-ntpd. When run as cron job, /usr/sbin/ is not in the path, which caused the synchronization to fail. (boo#962318) - Speedup ntpq (boo#782060, ntp-speedup-ntpq.patch). - Sync service files with openSUSE Factory. - Fix the TZ offset output of sntp during DST (boo#951559). - Add ntp-fork.patch and build with threads disabled to allow name resolution even when running chrooted. - Update to 4.2.8p6 : - CVE-2015-8158, boo#962966: Potential Infinite Loop in ntpq. - CVE-2015-8138, boo#963002: origin: Zero Origin Timestamp Bypass. - CVE-2015-7979, boo#962784: Off-path Denial of Service (DoS) attack on authenticated broadcast mode. - CVE-2015-7978, boo#963000: Stack exhaustion in recursive traversal of restriction list. - CVE-2015-7977, boo#962970: reslist NULL pointer dereference. - CVE-2015-7976, boo#962802: ntpq saveconfig command allows dangerous characters in filenames. - CVE-2015-7975, boo#962988: nextvar() missing length check. - CVE-2015-7974, boo#962960: Skeleton Key: Missing key check allows impersonation between authenticated peers. - CVE-2015-7973, boo#962995: Deja Vu: Replay attack on authenticated broadcast mode. - CVE-2015-8140: ntpq vulnerable to replay attacks. - CVE-2015-8139: Origin Leak: ntpq and ntpdc, disclose origin. - CVE-2015-5300, boo#951629: Small-step/Big-step. - Add /var/db/ntp-kod (boo#916617). - Add ntp-ENOBUFS.patch to limit a warning that might happen quite a lot on loaded systems (boo#956773). - add ntp.bug2965.diff (boo#954982) - fixes regression in 4.2.8p4 update - Update to 4.2.8p4 to fix several security issues (boo#951608) : - CVE-2015-7871: NAK to the Future: Symmetric association authentication bypass via crypto-NAK - CVE-2015-7855: decodenetnum() will ASSERT botch instead of returning FAIL on some bogus values - CVE-2015-7854: Password Length Memory Corruption Vulnerability - CVE-2015-7853: Invalid length data provided by a custom refclock driver could cause a buffer overflow - CVE-2015-7852 ntpq atoascii() Memory Corruption Vulnerability - CVE-2015-7851 saveconfig Directory Traversal Vulnerability - CVE-2015-7850 remote config logfile-keyfile - CVE-2015-7849 trusted key use-after-free - CVE-2015-7848 mode 7 loop counter underrun - CVE-2015-7701 Slow memory leak in CRYPTO_ASSOC - CVE-2015-7703 configuration directives 'pidfile' and 'driftfile' should only be allowed locally - CVE-2015-7704, CVE-2015-7705 Clients that receive a KoD should validate the origin timestamp field - CVE-2015-7691, CVE-2015-7692, CVE-2015-7702 Incomplete autokey data packet length checks - obsoletes ntp-memlock.patch. - Add a controlkey line to /etc/ntp.conf if one does not already exist to allow runtime configuuration via ntpq. - Temporarily disable memlock to avoid problems due to high memory usage during name resolution (boo#946386, ntp-memlock.patch). - Use SHA1 instead of MD5 for symmetric keys (boo#905885). - Improve runtime configuration : - Read keytype from ntp.conf - Don't write ntp keys to syslog. - Fix legacy action scripts to pass on command line arguments. - Remove ntp.1.gz, it wasn't installed anymore. - Remove ntp-4.2.7-rh-manpages.tar.gz and only keep ntptime.8.gz. The rest is partially irrelevant, partially redundant and potentially outdated (boo#942587). - Remove 'kod' from the restrict line in ntp.conf (boo#944300). - Use ntpq instead of deprecated ntpdc in start-ntpd (boo#936327). - Add a controlkey to ntp.conf to make the above work. - Don't let 'keysdir' lines in ntp.conf trigger the 'keys' parser. - Disable mode 7 (ntpdc) again, now that we don't use it anymore. - Add 'addserver' as a new legacy action. - Fix the comment regarding addserver in ntp.conf (boo#910063). - Update to version 4.2.8p3 which incorporates all security fixes and most other patches we have so far (fate#319040). More information on: http://archive.ntp.org/ntp4/ChangeLog-stable - Disable chroot by default (boo#926510). - Enable ntpdc for backwards compatibility (boo#920238). - Security fix: ntp-keygen may generate non-random symmetric keys
    last seen 2019-02-21
    modified 2018-12-18
    plugin id 91403
    published 2016-06-01
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91403
    title openSUSE Security Update : ntp (openSUSE-2016-649)
  • NASL family Amazon Linux Local Security Checks
    NASL id ALA_ALAS-2018-1009.NASL
    description Ephemeral association time spoofing additional protection ntpd in ntp 4.2.x before 4.2.8p7 and 4.3.x before 4.3.92 allows authenticated users that know the private symmetric key to create arbitrarily-many ephemeral associations in order to win the clock selection of ntpd and modify a victim's clock via a Sybil attack. This issue exists because of an incomplete fix for CVE-2016-1549 .(CVE-2018-7170) Interleaved symmetric mode cannot recover from bad state ntpd in ntp 4.2.8p4 before 4.2.8p11 drops bad packets before updating the 'received' timestamp, which allows remote attackers to cause a denial of service (disruption) by sending a packet with a zero-origin timestamp causing the association to reset and setting the contents of the packet as the most recent timestamp. This issue is a result of an incomplete fix for CVE-2015-7704 .(CVE-2018-7184) Ephemeral association time spoofing A malicious authenticated peer can create arbitrarily-many ephemeral associations in order to win the clock selection algorithm in ntpd in NTP 4.2.8p4 and earlier and NTPsec 3e160db8dc248a0bcb053b56a80167dc742d2b74 and a5fb34b9cc89b92a8fef2f459004865c93bb7f92 and modify a victim's clock.(CVE-2016-1549) Buffer read overrun leads information leak in ctl_getitem() The ctl_getitem method in ntpd in ntp-4.2.8p6 before 4.2.8p11 allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted mode 6 packet with a ntpd instance from 4.2.8p6 through 4.2.8p10. (CVE-2018-7182) Unauthenticated packet can reset authenticated interleaved association The protocol engine in ntp 4.2.6 before 4.2.8p11 allows a remote attackers to cause a denial of service (disruption) by continually sending a packet with a zero-origin timestamp and source IP address of the 'other side' of an interleaved association causing the victim ntpd to reset its association.(CVE-2018-7185) decodearr() can write beyond its buffer limit Buffer overflow in the decodearr function in ntpq in ntp 4.2.8p6 through 4.2.8p10 allows remote attackers to execute arbitrary code by leveraging an ntpq query and sending a response with a crafted array.(CVE-2018-7183)
    last seen 2019-02-21
    modified 2018-08-31
    plugin id 109697
    published 2018-05-11
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=109697
    title Amazon Linux AMI : ntp (ALAS-2018-1009)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2018-1765-2.NASL
    description This update for ntp fixes the following issues : Update to 4.2.8p11 (bsc#1082210) : - CVE-2016-1549: Sybil vulnerability: ephemeral association attack. While fixed in ntp-4.2.8p7, there are significant additional protections for this issue in 4.2.8p11. - CVE-2018-7182: ctl_getitem(): buffer read overrun leads to undefined behavior and information leak. (bsc#1083426) - CVE-2018-7170: Multiple authenticated ephemeral associations. (bsc#1083424) - CVE-2018-7184: Interleaved symmetric mode cannot recover from bad state. (bsc#1083422) - CVE-2018-7185: Unauthenticated packet can reset authenticated interleaved association. (bsc#1083420) - CVE-2018-7183: ntpq:decodearr() can write beyond its buffer limit.(bsc#1083417) Don't use libevent's cached time stamps in sntp. (bsc#1077445) This update is a reissue of the previous update with LTSS channels included. 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 2018-12-01
    plugin id 118269
    published 2018-10-22
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=118269
    title SUSE SLES12 Security Update : ntp (SUSE-SU-2018:1765-2)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2018-1765-1.NASL
    description This update for ntp fixes the following issues : - Update to 4.2.8p11 (bsc#1082210) : - CVE-2016-1549: Sybil vulnerability: ephemeral association attack. While fixed in ntp-4.2.8p7, there are significant additional protections for this issue in 4.2.8p11. - CVE-2018-7182: ctl_getitem(): buffer read overrun leads to undefined behavior and information leak. (bsc#1083426) - CVE-2018-7170: Multiple authenticated ephemeral associations. (bsc#1083424) - CVE-2018-7184: Interleaved symmetric mode cannot recover from bad state. (bsc#1083422) - CVE-2018-7185: Unauthenticated packet can reset authenticated interleaved association. (bsc#1083420) - CVE-2018-7183: ntpq:decodearr() can write beyond its buffer limit.(bsc#1083417) - Don't use libevent's cached time stamps in sntp. (bsc#1077445) This update is a reissue of the previous update with LTSS channels included. 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 2018-12-01
    plugin id 110639
    published 2018-06-21
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=110639
    title SUSE SLED12 / SLES12 Security Update : ntp (SUSE-SU-2018:1765-1)
  • NASL family Slackware Local Security Checks
    NASL id SLACKWARE_SSA_2018-229-01.NASL
    description New ntp packages are available for Slackware 14.0, 14.1, 14.2, and -current to fix security issues.
    last seen 2018-09-07
    modified 2018-09-06
    plugin id 111995
    published 2018-08-20
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=111995
    title Slackware 14.0 / 14.1 / 14.2 / current : ntp (SSA:2018-229-01)
  • NASL family FreeBSD Local Security Checks
    NASL id FREEBSD_PKG_AF485EF41C5811E88477D05099C0AE8C.NASL
    description Network Time Foundation reports : The NTP Project at Network Time Foundation is releasing ntp-4.2.8p11. This release addresses five security issues in ntpd : - LOW/MEDIUM: Sec 3012 / CVE-2016-1549 / VU#961909: Sybil vulnerability: ephemeral association attack - INFO/MEDIUM: Sec 3412 / CVE-2018-7182 / VU#961909 : ctl_getitem(): buffer read overrun leads to undefined behavior and information leak - LOW: Sec 3415 / CVE-2018-7170 / VU#961909: Multiple authenticated ephemeral associations - LOW: Sec 3453 / CVE-2018-7184 / VU#961909: Interleaved symmetric mode cannot recover from bad state - LOW/MEDIUM: Sec 3454 / CVE-2018-7185 / VU#961909 : Unauthenticated packet can reset authenticated interleaved association one security issue in ntpq : - MEDIUM: Sec 3414 / CVE-2018-7183 / VU#961909 : ntpq:decodearr() can write beyond its buffer limit and provides over 33 bugfixes and 32 other improvements.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 107046
    published 2018-02-28
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=107046
    title FreeBSD : ntp -- multiple vulnerabilities (af485ef4-1c58-11e8-8477-d05099c0ae8c)
  • NASL family Misc.
    NASL id ARISTA_EOS_SA0019.NASL
    description The version of Arista Networks EOS running on the remote device is affected by multiple vulnerabilities : - A flaw exists in NTP in the receive() function within file ntpd/ntp_proto.c that allows packets with an origin timestamp of zero to bypass security checks. An unauthenticated, remote attacker can exploit this to spoof arbitrary content. (CVE-2015-8138) - A flaw exists in NTP when handling crafted Crypto NAK Packets having spoofed source addresses that match an existing associated peer. A unauthenticated, remote attacker can exploit this to demobilize a client association, resulting in a denial of service condition. (CVE-2016-1547) - A flaw exists in NTP when handling packets that have been spoofed to appear to be coming from a valid ntpd server, which may cause a switch to interleaved symmetric mode. An unauthenticated, remote attacker can exploit this, via a packet having a spoofed timestamp, to cause the client to reject future legitimate server responses, resulting in a denial of service condition. (CVE-2016-1548) - A flaw exits in NTP when handling a saturation of ephemeral associations. An authenticated, remote attacker can exploit this to defeat the clock selection algorithm and thereby modify a victim's clock. (CVE-2016-1549) - A flaw exists in NTP in the message authentication functionality of libntp that is triggered when handling a series of specially crafted messages. An unauthenticated, remote attacker can exploit this to partially recover the message digest key. (CVE-2016-1550)
    last seen 2019-02-21
    modified 2018-08-09
    plugin id 107061
    published 2018-02-28
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=107061
    title Arista Networks EOS Multiple Vulnerabilities (SA0019)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2018-0808-1.NASL
    description This update for ntp fixes the following issues: Security issues fixed : - CVE-2016-1549: Significant additional protections against CVE-2016-1549 that was fixed in ntp-4.2.8p7 (bsc#1082210). - CVE-2018-7170: Ephemeral association time spoofing additional protection (bsc#1083424). - CVE-2018-7182: Buffer read overrun leads information leak in ctl_getitem() (bsc#1083426). - CVE-2018-7183: decodearr() can write beyond its buffer limit (bsc#1083417). - CVE-2018-7184: Interleaved symmetric mode cannot recover from bad state (bsc#1083422). - CVE-2018-7185: Unauthenticated packet can reset authenticated interleaved association (bsc#1083420). Bug fixes : - bsc#1077445: Don't use libevent's cached time stamps in sntp. - Disable CMAC in ntp when building against a version of OpenSSL that doesn't support it. 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 2018-12-01
    plugin id 108651
    published 2018-03-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=108651
    title SUSE SLES11 Security Update : ntp (SUSE-SU-2018:0808-1)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2018-0956-1.NASL
    description This update for ntp fixes the following issues : - Update to 4.2.8p11 (bsc#1082210) : - CVE-2016-1549: Sybil vulnerability: ephemeral association attack. While fixed in ntp-4.2.8p7, there are significant additional protections for this issue in 4.2.8p11. - CVE-2018-7182: ctl_getitem(): buffer read overrun leads to undefined behavior and information leak. (bsc#1083426) - CVE-2018-7170: Multiple authenticated ephemeral associations. (bsc#1083424) - CVE-2018-7184: Interleaved symmetric mode cannot recover from bad state. (bsc#1083422) - CVE-2018-7185: Unauthenticated packet can reset authenticated interleaved association. (bsc#1083420) - CVE-2018-7183: ntpq:decodearr() can write beyond its buffer limit.(bsc#1083417) - Don't use libevent's cached time stamps in sntp. (bsc#1077445) 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 2018-12-01
    plugin id 109085
    published 2018-04-17
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=109085
    title SUSE SLED12 / SLES12 Security Update : ntp (SUSE-SU-2018:0956-1)
  • NASL family Misc.
    NASL id NTP_4_2_8P7.NASL
    description The version of the remote NTP server is 3.x or 4.x prior to 4.2.8p7. It is, therefore, affected by the following vulnerabilities : - A denial of service vulnerability exists due to improper validation of the origin timestamp field when handling a Kiss-of-Death (KoD) packet. An unauthenticated, remote attacker can exploit this to cause a client to stop querying its servers, preventing the client from updating its clock. (CVE-2015-7704) - A flaw exists in the receive() function in ntp_proto.c that allows packets with an origin timestamp of zero to bypass security checks. An unauthenticated, remote attacker can exploit this to spoof arbitrary content. (CVE-2015-8138) - A denial of service vulnerability exists due to improper handling of a crafted Crypto NAK Packet with a source address spoofed to match that of an existing associated peer. An unauthenticated, remote attacker can exploit this to demobilize a client association. (CVE-2016-1547) - A denial of service vulnerability exists due to improper handling of packets spoofed to appear to be from a valid ntpd server. An unauthenticated, remote attacker can exploit this to cause NTP to switch from basic client/server mode to interleaved symmetric mode, causing the client to reject future legitimate responses. (CVE-2016-1548) - A race condition exists that is triggered during the handling of a saturation of ephemeral associations. An authenticated, remote attacker can exploit this to defeat NTP's clock selection algorithm and modify a user's clock. (CVE-2016-1549) - An information disclosure vulnerability exists in the message authentication functionality in libntp that is triggered during the handling of a series of specially crafted messages. An adjacent attacker can exploit this to partially recover the message digest key. (CVE-2016-1550) - A flaw exists due to improper filtering of IPv4 'bogon' packets received from a network. An unauthenticated, remote attacker can exploit this to spoof packets to appear to come from a specific reference clock. (CVE-2016-1551) - A denial of service vulnerability exists that allows an authenticated, remote attacker that has knowledge of the controlkey for ntpq or the requestkey for ntpdc to create a session with the same IP twice on an unconfigured directive line, causing ntpd to abort. (CVE-2016-2516) - A denial of service vulnerability exists that allows an authenticated, remote attacker to manipulate the value of the trustedkey, controlkey, or requestkey via a crafted packet, preventing authentication with ntpd until the daemon has been restarted. (CVE-2016-2517) - An out-of-bounds read error exists in the MATCH_ASSOC() function that occurs during the creation of peer associations with hmode greater than 7. An authenticated, remote attacker can exploit this, via a specially crafted packet, to cause a denial of service. (CVE-2016-2518) - An overflow condition exists in the ctl_getitem() function in ntpd due to improper validation of user-supplied input when reporting return values. An authenticated, remote attacker can exploit this to cause ntpd to abort. (CVE-2016-2519)
    last seen 2019-02-21
    modified 2019-01-22
    plugin id 90923
    published 2016-05-05
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=90923
    title Network Time Protocol Daemon (ntpd) 3.x / 4.x < 4.2.8p7 Multiple Vulnerabilities
  • NASL family Slackware Local Security Checks
    NASL id SLACKWARE_SSA_2018-060-02.NASL
    description New ntp packages are available for Slackware 14.0, 14.1, 14.2, and -current to fix security issues.
    last seen 2018-09-07
    modified 2018-09-06
    plugin id 107103
    published 2018-03-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=107103
    title Slackware 14.0 / 14.1 / 14.2 / current : ntp (SSA:2018-060-02)
  • NASL family Misc.
    NASL id NTP_4_2_8P12.NASL
    description The version of the remote NTP server is 4.x prior to 4.2.8p12, or is 4.3.x prior to 4.3.94. It is, therefore, affected by the following vulnerabilities: - A race condition exists that is triggered during the handling of a saturation of ephemeral associations. An authenticated, remote attacker can exploit this to defeat NTP's clock selection algorithm and modify a user's clock. (CVE-2016-1549) - A buffer overflow vulnerability exists within the openhost() function of the ntpq anmd ntpdc. A local attacker, using an excessively large hostname, could cause a stack overflow and potentially allow for remote code execution or privilege escalation. (CVE-2018-12327)
    last seen 2019-02-21
    modified 2018-12-07
    plugin id 111968
    published 2018-08-17
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=111968
    title Network Time Protocol Daemon (ntpd) 4.x < 4.2.8p12 / 4.3.x < 4.3.94 Multiple Vulnerabilities
  • NASL family Slackware Local Security Checks
    NASL id SLACKWARE_SSA_2016-120-01.NASL
    description New ntp 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 2018-09-06
    plugin id 90800
    published 2016-05-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=90800
    title Slackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / current : ntp (SSA:2016-120-01)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2016-599.NASL
    description This update for ntp to 4.2.8p7 fixes the following issues : - CVE-2016-1547, bsc#977459: Validate crypto-NAKs, AKA: CRYPTO-NAK DoS. - CVE-2016-1548, bsc#977461: Interleave-pivot - CVE-2016-1549, bsc#977451: Sybil vulnerability: ephemeral association attack. - CVE-2016-1550, bsc#977464: Improve NTP security against buffer comparison timing attacks. - CVE-2016-1551, bsc#977450: Refclock impersonation vulnerability - CVE-2016-2516, bsc#977452: Duplicate IPs on unconfig directives will cause an assertion botch in ntpd. - CVE-2016-2517, bsc#977455: remote configuration trustedkey/ requestkey/controlkey values are not properly validated. - CVE-2016-2518, bsc#977457: Crafted addpeer with hmode > 7 causes array wraparound with MATCH_ASSOC. - CVE-2016-2519, bsc#977458: ctl_getitem() return value not always checked. - This update also improves the fixes for: CVE-2015-7704, CVE-2015-7705, CVE-2015-7974 Bugs fixed : - Restrict the parser in the startup script to the first occurrance of 'keys' and 'controlkey' in ntp.conf (bsc#957226). This update was imported from the SUSE:SLE-12-SP1:Update update project.
    last seen 2019-02-21
    modified 2018-09-06
    plugin id 91269
    published 2016-05-20
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91269
    title openSUSE Security Update : ntp (openSUSE-2016-599)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-1278-1.NASL
    description This update for ntp to 4.2.8p7 fixes the following issues : - CVE-2016-1547, bsc#977459: Validate crypto-NAKs, AKA: CRYPTO-NAK DoS. - CVE-2016-1548, bsc#977461: Interleave-pivot - CVE-2016-1549, bsc#977451: Sybil vulnerability: ephemeral association attack. - CVE-2016-1550, bsc#977464: Improve NTP security against buffer comparison timing attacks. - CVE-2016-1551, bsc#977450: Refclock impersonation vulnerability - CVE-2016-2516, bsc#977452: Duplicate IPs on unconfig directives will cause an assertion botch in ntpd. - CVE-2016-2517, bsc#977455: remote configuration trustedkey/ requestkey/controlkey values are not properly validated. - CVE-2016-2518, bsc#977457: Crafted addpeer with hmode > 7 causes array wraparound with MATCH_ASSOC. - CVE-2016-2519, bsc#977458: ctl_getitem() return value not always checked. - This update also improves the fixes for: CVE-2015-7704, CVE-2015-7705, CVE-2015-7974 Bugs fixed : - Restrict the parser in the startup script to the first occurrance of 'keys' and 'controlkey' in ntp.conf (bsc#957226). 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 91120
    published 2016-05-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91120
    title SUSE SLES11 Security Update : ntp (SUSE-SU-2016:1278-1)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-1291-1.NASL
    description This update for ntp to 4.2.8p7 fixes the following issues : - CVE-2016-1547, bsc#977459: Validate crypto-NAKs, AKA: CRYPTO-NAK DoS. - CVE-2016-1548, bsc#977461: Interleave-pivot - CVE-2016-1549, bsc#977451: Sybil vulnerability: ephemeral association attack. - CVE-2016-1550, bsc#977464: Improve NTP security against buffer comparison timing attacks. - CVE-2016-1551, bsc#977450: Refclock impersonation vulnerability - CVE-2016-2516, bsc#977452: Duplicate IPs on unconfig directives will cause an assertion botch in ntpd. - CVE-2016-2517, bsc#977455: remote configuration trustedkey/ requestkey/controlkey values are not properly validated. - CVE-2016-2518, bsc#977457: Crafted addpeer with hmode > 7 causes array wraparound with MATCH_ASSOC. - CVE-2016-2519, bsc#977458: ctl_getitem() return value not always checked. - This update also improves the fixes for: CVE-2015-7704, CVE-2015-7705, CVE-2015-7974 Bugs fixed : - Restrict the parser in the startup script to the first occurrance of 'keys' and 'controlkey' in ntp.conf (bsc#957226). 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 91159
    published 2016-05-16
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91159
    title SUSE SLED12 / SLES12 Security Update : ntp (SUSE-SU-2016:1291-1)
  • NASL family Misc.
    NASL id NTP_4_2_8P11.NASL
    description The version of the remote NTP server is 4.x prior to 4.2.8p11. It is, therefore, affected by multiple vulnerabilities, which allow denial of service attacks, information disclosure and possibly, remote code execution.
    last seen 2019-02-21
    modified 2018-08-16
    plugin id 107258
    published 2018-03-09
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=107258
    title Network Time Protocol Daemon (ntpd) 4.x < 4.2.8p11 Multiple Vulnerabilities
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2018-1464-1.NASL
    description This update for ntp fixes the following issues : - Update to 4.2.8p11 (bsc#1082210) : - CVE-2016-1549: Sybil vulnerability: ephemeral association attack. While fixed in ntp-4.2.8p7, there are significant additional protections for this issue in 4.2.8p11. - CVE-2018-7182: ctl_getitem(): buffer read overrun leads to undefined behavior and information leak. (bsc#1083426) - CVE-2018-7170: Multiple authenticated ephemeral associations. (bsc#1083424) - CVE-2018-7184: Interleaved symmetric mode cannot recover from bad state. (bsc#1083422) - CVE-2018-7185: Unauthenticated packet can reset authenticated interleaved association. (bsc#1083420) - CVE-2018-7183: ntpq:decodearr() can write beyond its buffer limit.(bsc#1083417) - Don't use libevent's cached time stamps in sntp. (bsc#1077445) - Fix systemd migration in %pre (bsc#1034892). 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 2018-12-01
    plugin id 110224
    published 2018-05-30
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=110224
    title SUSE SLES12 Security Update : ntp (SUSE-SU-2018:1464-1)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_SU-2016-1912-1.NASL
    description NTP was updated to version 4.2.8p8 to fix several security issues and to ensure the continued maintainability of the package. These security issues were fixed : CVE-2016-4953: Bad authentication demobilized ephemeral associations (bsc#982065). CVE-2016-4954: Processing spoofed server packets (bsc#982066). CVE-2016-4955: Autokey association reset (bsc#982067). CVE-2016-4956: Broadcast interleave (bsc#982068). CVE-2016-4957: CRYPTO_NAK crash (bsc#982064). CVE-2016-1547: Validate crypto-NAKs to prevent ACRYPTO-NAK DoS (bsc#977459). CVE-2016-1548: Prevent the change of time of an ntpd client or denying service to an ntpd client by forcing it to change from basic client/server mode to interleaved symmetric mode (bsc#977461). CVE-2016-1549: Sybil vulnerability: ephemeral association attack (bsc#977451). CVE-2016-1550: Improve security against buffer comparison timing attacks (bsc#977464). CVE-2016-1551: Refclock impersonation vulnerability (bsc#977450)y CVE-2016-2516: Duplicate IPs on unconfig directives could have caused an assertion botch in ntpd (bsc#977452). CVE-2016-2517: Remote configuration trustedkey/ requestkey/controlkey values are not properly validated (bsc#977455). CVE-2016-2518: Crafted addpeer with hmode > 7 causes array wraparound with MATCH_ASSOC (bsc#977457). CVE-2016-2519: ctl_getitem() return value not always checked (bsc#977458). CVE-2015-8158: Potential Infinite Loop in ntpq (bsc#962966). CVE-2015-8138: Zero Origin Timestamp Bypass (bsc#963002). CVE-2015-7979: Off-path Denial of Service (DoS) attack on authenticated broadcast mode (bsc#962784). CVE-2015-7978: Stack exhaustion in recursive traversal of restriction list (bsc#963000). CVE-2015-7977: reslist NULL pointer dereference (bsc#962970). CVE-2015-7976: ntpq saveconfig command allowed dangerous characters in filenames (bsc#962802). CVE-2015-7975: nextvar() missing length check (bsc#962988). CVE-2015-7974: NTP did not verify peer associations of symmetric keys when authenticating packets, which might have allowed remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a 'skeleton' key (bsc#962960). CVE-2015-7973: Replay attack on authenticated broadcast mode (bsc#962995). CVE-2015-5300: MITM attacker can force ntpd to make a step larger than the panic threshold (bsc#951629). CVE-2015-5194: Crash with crafted logconfig configuration command (bsc#943218). CVE-2015-7871: NAK to the Future: Symmetric association authentication bypass via crypto-NAK (bsc#952611). CVE-2015-7855: decodenetnum() will ASSERT botch instead of returning FAIL on some bogus values (bsc#952611). CVE-2015-7854: Password Length Memory Corruption Vulnerability (bsc#952611). CVE-2015-7853: Invalid length data provided by a custom refclock driver could cause a buffer overflow (bsc#952611). CVE-2015-7852: ntpq atoascii() Memory Corruption Vulnerability (bsc#952611). CVE-2015-7851: saveconfig Directory Traversal Vulnerability (bsc#952611). CVE-2015-7850: Clients that receive a KoD now validate the origin timestamp field (bsc#952611). CVE-2015-7849: Prevent use-after-free trusted key (bsc#952611). CVE-2015-7848: Prevent mode 7 loop counter underrun (bsc#952611). CVE-2015-7701: Slow memory leak in CRYPTO_ASSOC (bsc#952611). CVE-2015-7703: Configuration directives 'pidfile' and 'driftfile' should only be allowed locally (bsc#943221). CVE-2015-7704: Clients that receive a KoD should validate the origin timestamp field (bsc#952611). CVE-2015-7705: Clients that receive a KoD should validate the origin timestamp field (bsc#952611). CVE-2015-7691: Incomplete autokey data packet length checks (bsc#952611). CVE-2015-7692: Incomplete autokey data packet length checks (bsc#952611). CVE-2015-7702: Incomplete autokey data packet length checks (bsc#952611). CVE-2015-1798: The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP required a correct MAC only if the MAC field has a nonzero length, which made it easier for man-in-the-middle attackers to spoof packets by omitting the MAC (bsc#924202). CVE-2015-1799: The symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP performed state-variable updates upon receiving certain invalid packets, which made it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer (bsc#924202). The update package also includes non-security fixes. See advisory for details. 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 93186
    published 2016-08-29
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=93186
    title SUSE SLES10 Security Update : ntp (SUSE-SU-2016:1912-1)
  • NASL family FreeBSD Local Security Checks
    NASL id FREEBSD_PKG_B2487D9A0C3011E6ACD0D050996490D0.NASL
    description Network Time Foundation reports : NTF's NTP Project has been notified of the following low- and medium-severity vulnerabilities that are fixed in ntp-4.2.8p7, released on Tuesday, 26 April 2016 : - Bug 3020 / CVE-2016-1551: Refclock impersonation vulnerability, AKA: refclock-peering. Reported by Matt Street and others of Cisco ASIG - Bug 3012 / CVE-2016-1549: Sybil vulnerability : ephemeral association attack, AKA: ntp-sybil - MITIGATION ONLY. Reported by Matthew Van Gundy of Cisco ASIG - Bug 3011 / CVE-2016-2516: Duplicate IPs on unconfig directives will cause an assertion botch. Reported by Yihan Lian of the Cloud Security Team, Qihoo 360 - Bug 3010 / CVE-2016-2517: Remote configuration trustedkey/requestkey values are not properly validated. Reported by Yihan Lian of the Cloud Security Team, Qihoo 360 - Bug 3009 / CVE-2016-2518: Crafted addpeer with hmode > 7 causes array wraparound with MATCH_ASSOC. Reported by Yihan Lian of the Cloud Security Team, Qihoo 360 - Bug 3008 / CVE-2016-2519: ctl_getitem() return value not always checked. Reported by Yihan Lian of the Cloud Security Team, Qihoo 360 - Bug 3007 / CVE-2016-1547: Validate crypto-NAKs, AKA: nak-dos. Reported by Stephen Gray and Matthew Van Gundy of Cisco ASIG - Bug 2978 / CVE-2016-1548: Interleave-pivot - MITIGATION ONLY. Reported by Miroslav Lichvar of RedHat and separately by Jonathan Gardner of Cisco ASIG. - Bug 2952 / CVE-2015-7704: KoD fix: peer associations were broken by the fix for NtpBug2901, AKA: Symmetric active/passive mode is broken. Reported by Michael Tatarinov, NTP Project Developer Volunteer - Bug 2945 / Bug 2901 / CVE-2015-8138: Zero Origin Timestamp Bypass, AKA: Additional KoD Checks. Reported by Jonathan Gardner of Cisco ASIG - Bug 2879 / CVE-2016-1550: Improve NTP security against buffer comparison timing attacks, authdecrypt-timing, AKA: authdecrypt-timing. Reported independently by Loganaden Velvindron, and Matthew Van Gundy and Stephen Gray of Cisco ASIG.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 90742
    published 2016-04-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=90742
    title FreeBSD : ntp -- multiple vulnerabilities (b2487d9a-0c30-11e6-acd0-d050996490d0)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2018-376.NASL
    description This update for ntp fixes the following issues : - Update to 4.2.8p11 (bsc#1082210) : - CVE-2016-1549: Sybil vulnerability: ephemeral association attack. While fixed in ntp-4.2.8p7, there are significant additional protections for this issue in 4.2.8p11. - CVE-2018-7182: ctl_getitem(): buffer read overrun leads to undefined behavior and information leak. (bsc#1083426) - CVE-2018-7170: Multiple authenticated ephemeral associations. (bsc#1083424) - CVE-2018-7184: Interleaved symmetric mode cannot recover from bad state. (bsc#1083422) - CVE-2018-7185: Unauthenticated packet can reset authenticated interleaved association. (bsc#1083420) - CVE-2018-7183: ntpq:decodearr() can write beyond its buffer limit.(bsc#1083417) - Don't use libevent's cached time stamps in sntp. (bsc#1077445) This update was imported from the SUSE:SLE-12-SP1:Update update project.
    last seen 2019-02-21
    modified 2018-09-06
    plugin id 109102
    published 2018-04-18
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=109102
    title openSUSE Security Update : ntp (openSUSE-2018-376)
refmap via4
bid 88200
confirm
freebsd FreeBSD-SA-16:16
gentoo GLSA-201607-15
misc http://www.talosintelligence.com/reports/TALOS-2016-0083/
sectrack 1035705
talos via4
id TALOS-2016-0083
last seen 2018-08-31
published 2016-04-26
reporter Talos Intelligence
source http://www.talosintelligence.com/vulnerability_reports/TALOS-2016-0083
title Network Time Protocol Ephemeral Association Time Spoofing Vulnerability
Last major update 10-01-2017 - 21:59
Published 06-01-2017 - 16:59
Last modified 27-03-2018 - 21:29
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