{"id":"CVE-2015-7704","aliases":["DEBIAN-CVE-2015-7704","DLA-335-1","DSA-3388-1","EUVD-2015-7605","GHSA-jm9v-x8m5-p6p2","MGASA-2015-0413","RHSA-2015:1930","RHSA-2015:2520","SUSE-SU-2015:2058-1","SUSE-SU-2016:1247-1","SUSE-SU-2016:1278-1","SUSE-SU-2016:1291-1","SUSE-SU-2016:1311-1","SUSE-SU-2016:1471-1","SUSE-SU-2016:1568-1","UBUNTU-CVE-2015-7704","USN-2783-1","openSUSE-SU-2024:10181-1"],"status":"published","title":"The ntpd client in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to...","description":"The ntpd client in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service via a number of crafted \"KOD\" 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url":"https://ubuntu.com/security/CVE-2015-7703","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2015-7705","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2015-7850","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2015-7852","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2015-7853","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2015-7855","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2015-7871","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2009-0159","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2009-1252","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-5211","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-9293","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-9294","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-9295","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-9296","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-9297","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-9298","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-1798","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-1799","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7426","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7427","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7428","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7429","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7431","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7433","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-7434","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-9310","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-9311","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2015-7704","description":"The ntpd client in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service via a number of crafted \"KOD\" messages.","status":"published","published":"2017-08-07T20:00:00Z","modified":"2024-08-06T07:58:59.543Z","updated_at":"2026-11-02T14:35:44.744952Z"}],"euvd":[{"id":"EUVD-2015-7605","description":"The ntpd client in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service via a number of crafted \"KOD\" messages.","status":"published","published":"2017-08-07T20:00:00Z","modified":"2024-08-06T07:58:59Z","updated_at":"2026-11-03T02:21:51.562291Z"}],"ghsa":[{"id":"GHSA-jm9v-x8m5-p6p2","title":"The ntpd client in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to...","description":"The ntpd client in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service via a number of crafted \"KOD\" messages.","status":"published","published":"2022-05-13T01:05:10Z","modified":"2025-04-20T03:43:23Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:01:50.044707Z"}],"nvd":[{"id":"CVE-2015-7704","description":"The ntpd client in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service via a number of crafted \"KOD\" messages.","status":"published","published":"2017-08-07T20:29:00.683Z","modified":"2026-06-17T00:32:59.947Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:03:17.730372Z"}],"osv":[{"id":"CVE-2015-7704","description":"The ntpd client in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service via a number of crafted \"KOD\" messages.","status":"published","published":"2017-08-07T20:29:00Z","modified":"2026-04-16T06:18:16.908124404Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:01.068991Z"},{"id":"DEBIAN-CVE-2015-7704","description":"The ntpd client in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service via a number of crafted \"KOD\" messages.","status":"published","published":"2017-08-07T20:29:00.683Z","modified":"2026-08-27T23:02:05.015560217Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:27.04239Z"},{"id":"UBUNTU-CVE-2015-7704","description":"The ntpd client in NTP 4.x before 4.2.8p4 and 4.3.x before 4.3.77 allows remote attackers to cause a denial of service via a number of crafted \"KOD\" messages.","status":"published","published":"2015-10-22T00:00:00Z","modified":"2026-02-04T04:38:01.880382Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:10.737723Z"},{"id":"DLA-335-1","title":"ntp - security update","status":"published","published":"2015-10-28T00:00:00Z","modified":"2026-03-09T01:23:37.230378Z","updated_at":"2026-11-02T15:46:11.734021Z"},{"id":"DSA-3388-1","title":"ntp - security update","status":"published","published":"2015-11-01T00:00:00Z","modified":"2026-03-09T01:20:49.800811Z","updated_at":"2026-11-02T15:46:16.199525Z"},{"id":"MGASA-2015-0413","title":"Updated ntp packages fixes security vulnerabilities","description":"It was found that ntpd did not correctly implement the threshold\nlimitation for the '-g' option, which is used to set the time without any\nrestrictions.\n\nA man-in-the-middle attacker able to intercept NTP traffic between a\nconnecting client and an NTP server could use this flaw to force that\nclient to make multiple steps larger than the panic threshold, effectively\nchanging the time to an arbitrary value at any time (CVE-2015-5300).\n\nSlow memory leak in CRYPTO_ASSOC with autokey (CVE-2015-7701).\n\nIncomplete autokey data packet length checks could result in crash caused\nby a crafted packet (CVE-2015-7691, CVE-2015-7692, CVE-2015-7702).\n\nClients that receive a KoD should validate the origin timestamp field\n(CVE-2015-7704).\n\nntpq atoascii() Memory Corruption Vulnerability could result in ntpd crash\ncaused by a crafted packet (CVE-2015-7852).\n\nSymmetric association authentication bypass via crypto-NAK\n(CVE-2015-7871).\n","status":"published","published":"2015-10-25T21:50:36Z","modified":"2026-04-16T06:24:10.965141579Z","updated_at":"2026-11-02T15:49:39.792687Z"},{"id":"openSUSE-SU-2024:10181-1","title":"ntp-4.2.8p9-1.1 on GA media","description":"These are all security issues fixed in the ntp-4.2.8p9-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:21:26.696395Z","updated_at":"2026-11-02T16:58:33.135986Z"},{"id":"RHSA-2015:1930","title":"Red Hat Security Advisory: ntp security update","status":"published","published":"2024-09-15T22:55:09Z","modified":"2026-06-26T12:21:49.881502578Z","updated_at":"2026-11-02T15:53:03.182161Z"},{"id":"RHSA-2015:2520","title":"Red Hat Security Advisory: ntp security update","status":"published","published":"2024-09-15T22:55:15Z","modified":"2026-06-26T12:20:39.082888305Z","updated_at":"2026-11-02T15:53:03.182161Z"},{"id":"SUSE-SU-2015:2058-1","title":"Security update for ntp","description":"This ntp update provides the following security and non security fixes:\n\n- Update to 4.2.8p4 to fix several security issues (bsc#951608):\n  * CVE-2015-7871: NAK to the Future: Symmetric association\n    authentication bypass via crypto-NAK\n  * CVE-2015-7855: decodenetnum() will ASSERT botch instead of\n    returning FAIL on some bogus values\n  * CVE-2015-7854: Password Length Memory Corruption Vulnerability\n  * CVE-2015-7853: Invalid length data provided by a custom\n    refclock driver could cause a buffer overflow\n  * CVE-2015-7852 ntpq atoascii() Memory Corruption Vulnerability\n  * CVE-2015-7851 saveconfig Directory Traversal Vulnerability\n  * CVE-2015-7850 remote config logfile-keyfile\n  * CVE-2015-7849 trusted key use-after-free\n  * CVE-2015-7848 mode 7 loop counter underrun\n  * CVE-2015-7701 Slow memory leak in CRYPTO_ASSOC\n  * CVE-2015-7703 configuration directives 'pidfile' and\n    'driftfile' should only be allowed locally\n  * CVE-2015-7704, CVE-2015-7705 Clients that receive a KoD should\n    validate the origin timestamp field\n  * CVE-2015-7691, CVE-2015-7692, CVE-2015-7702 Incomplete autokey\n    data packet length checks\n- Use ntpq instead of deprecated ntpdc in start-ntpd (bnc#936327).\n- Add a controlkey to ntp.conf to make the above work.\n- Improve runtime configuration:\n  * Read keytype from ntp.conf\n  * Don't write ntp keys to syslog.\n- Don't let 'keysdir' lines in ntp.conf trigger the 'keys' parser.\n- Fix the comment regarding addserver in ntp.conf (bnc#910063).\n- Remove ntp.1.gz, it wasn't installed anymore.\n- Remove ntp-4.2.7-rh-manpages.tar.gz and only keep ntptime.8.gz.\n  The rest is partially irrelevant, partially redundant and\n  potentially outdated (bsc#942587).\n- Remove 'kod' from the restrict line in ntp.conf (bsc#944300).\n- Use SHA1 instead of MD5 for symmetric keys (bsc#905885).\n- Require perl-Socket6 (bsc#942441).\n- Fix incomplete backporting of 'rcntp ntptimemset'.\n","status":"published","published":"2015-11-20T09:21:30Z","modified":"2026-02-04T03:52:51.902373Z","updated_at":"2026-11-02T15:53:43.030986Z"},{"id":"SUSE-SU-2016:1247-1","title":"Security update for ntp","description":"ntp was updated to version 4.2.8p6 to fix 28 security issues.\n\nMajor functional changes:\n- The 'sntp' commandline tool changed its option handling in a major way,\n  some options have been renamed or dropped.\n- 'controlkey 1' is added during update to ntp.conf to allow sntp to work.\n- The local clock is being disabled during update.\n- ntpd is no longer running chrooted.\n\nOther functional changes:\n- ntp-signd is installed.\n- 'enable mode7' can be added to the configuration to allow ntdpc to work as compatibility mode option.\n- 'kod' was removed from the default restrictions.\n- SHA1 keys are used by default instead of MD5 keys.\n\nAlso yast2-ntp-client was updated to match some sntp syntax changes. (bsc#937837)\n\nThese security issues were fixed:\n- CVE-2015-8158: Fixed potential infinite loop in ntpq (bsc#962966).\n- CVE-2015-8138: Zero Origin Timestamp Bypass (bsc#963002).\n- CVE-2015-7979: Off-path Denial of Service (DoS) attack on authenticated broadcast mode (bsc#962784).\n- CVE-2015-7978: Stack exhaustion in recursive traversal of restriction list (bsc#963000).\n- CVE-2015-7977: reslist NULL pointer dereference (bsc#962970).\n- CVE-2015-7976: ntpq saveconfig command allows dangerous characters in filenames (bsc#962802).\n- CVE-2015-7975: nextvar() missing length check (bsc#962988).\n- CVE-2015-7974: Skeleton Key: Missing key check allows impersonation between authenticated peers (bsc#962960).\n- CVE-2015-7973: Replay attack on authenticated broadcast mode (bsc#962995).\n- CVE-2015-8140: ntpq vulnerable to replay attacks (bsc#962994).\n- CVE-2015-8139: Origin Leak: ntpq and ntpdc, disclose origin (bsc#962997).\n- CVE-2015-5300: MITM attacker could have forced ntpd to make a step larger than the panic threshold (bsc#951629).\n- CVE-2015-7871: NAK to the Future: Symmetric association authentication bypass via crypto-NAK (bsc#951608).\n- CVE-2015-7855: decodenetnum() will ASSERT botch instead of returning FAIL on some bogus values (bsc#951608).\n- CVE-2015-7854: Password Length Memory Corruption Vulnerability (bsc#951608).\n- CVE-2015-7853: Invalid length data provided by a custom refclock driver could cause a buffer overflow (bsc#951608).\n- CVE-2015-7852: ntpq atoascii() Memory Corruption Vulnerability (bsc#951608).\n- CVE-2015-7851: saveconfig Directory Traversal Vulnerability (bsc#951608).\n- CVE-2015-7850: remote config logfile-keyfile (bsc#951608).\n- CVE-2015-7849: trusted key use-after-free (bsc#951608).\n- CVE-2015-7848: mode 7 loop counter underrun (bsc#951608).\n- CVE-2015-7701: Slow memory leak in CRYPTO_ASSOC (bsc#951608).\n- CVE-2015-7703: configuration directives 'pidfile' and 'driftfile' should only be allowed locally (bsc#951608).\n- CVE-2015-7704, CVE-2015-7705: Clients that receive a KoD should validate the origin timestamp field (bsc#951608).\n- CVE-2015-7691, CVE-2015-7692, CVE-2015-7702: Incomplete autokey data packet length checks (bsc#951608).\n\nThese non-security issues were fixed:\n- fate#320758 bsc#975981: Enable compile-time support for MS-SNTP (--enable-ntp-signd).\n  This replaces the w32 patches in 4.2.4 that added the authreg\n  directive.\n- bsc#962318: Call /usr/sbin/sntp with full path to synchronize in start-ntpd.\n  When run as cron job, /usr/sbin/ is not in the path, which caused\n  the synchronization to fail.\n- bsc#782060: Speedup ntpq.\n- bsc#916617: Add /var/db/ntp-kod.\n- bsc#956773: Add ntp-ENOBUFS.patch to limit a warning that might happen quite a lot on loaded systems.\n- bsc#951559,bsc#975496: Fix the TZ offset output of sntp during DST.\n- Add ntp-fork.patch and build with threads disabled to allow name resolution even when running chrooted.\n- Add a controlkey line to /etc/ntp.conf if one does not already exist to allow runtime configuuration via ntpq.\n- bsc#946386: Temporarily disable memlock to avoid problems due to high memory usage during name resolution.\n- bsc#905885: Use SHA1 instead of MD5 for symmetric keys.\n- Improve runtime configuration:\n  * Read keytype from ntp.conf\n  * Don't write ntp keys to syslog.\n- Fix legacy action scripts to pass on command line arguments.\n- bsc#944300: Remove 'kod' from the restrict line in ntp.conf.\n- bsc#936327: Use ntpq instead of deprecated ntpdc in start-ntpd.\n- Add a controlkey to ntp.conf to make the above work.\n- Don't let 'keysdir' lines in ntp.conf trigger the 'keys' parser.\n- Disable mode 7 (ntpdc) again, now that we don't use it anymore.\n- Add 'addserver' as a new legacy action.\n- bsc#910063: Fix the comment regarding addserver in ntp.conf.\n- bsc#926510: Disable chroot by default.\n- bsc#920238: Enable ntpdc for backwards compatibility.\n","status":"published","published":"2016-05-06T07:50:51Z","modified":"2026-02-04T03:41:19.510535Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"SUSE-SU-2016:1278-1","title":"Security update for ntp","description":"\nThis update for ntp to 4.2.8p7 fixes the following issues:\n\n* CVE-2016-1547, bsc#977459:\n  Validate crypto-NAKs, AKA: CRYPTO-NAK DoS.\n* CVE-2016-1548, bsc#977461: Interleave-pivot\n* CVE-2016-1549, bsc#977451:\n  Sybil vulnerability: ephemeral association attack.\n* CVE-2016-1550, bsc#977464: Improve NTP security against buffer\n  comparison timing attacks.\n* CVE-2016-1551, bsc#977450:\n  Refclock impersonation vulnerability\n* CVE-2016-2516, bsc#977452: Duplicate IPs on unconfig\n  directives will cause an assertion botch in ntpd.\n* CVE-2016-2517, bsc#977455: remote configuration trustedkey/\n  requestkey/controlkey values are not properly validated.\n* CVE-2016-2518, bsc#977457: Crafted addpeer with hmode \u003e 7\n  causes array wraparound with MATCH_ASSOC.\n* CVE-2016-2519, bsc#977458: ctl_getitem() return value not\n  always checked.\n* This update also improves the fixes for:\n  CVE-2015-7704, CVE-2015-7705, CVE-2015-7974\n\nBugs fixed:\n- Restrict the parser in the startup script to the first\n  occurrance of 'keys' and 'controlkey' in ntp.conf (bsc#957226).\n","status":"published","published":"2016-05-11T12:37:44Z","modified":"2026-02-04T02:37:24.950334Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"SUSE-SU-2016:1291-1","title":"Security update for ntp","description":"\nThis update for ntp to 4.2.8p7 fixes the following issues:\n\n* CVE-2016-1547, bsc#977459:\n  Validate crypto-NAKs, AKA: CRYPTO-NAK DoS.\n* CVE-2016-1548, bsc#977461: Interleave-pivot\n* CVE-2016-1549, bsc#977451:\n  Sybil vulnerability: ephemeral association attack.\n* CVE-2016-1550, bsc#977464: Improve NTP security against buffer\n  comparison timing attacks.\n* CVE-2016-1551, bsc#977450:\n  Refclock impersonation vulnerability\n* CVE-2016-2516, bsc#977452: Duplicate IPs on unconfig\n  directives will cause an assertion botch in ntpd.\n* CVE-2016-2517, bsc#977455: remote configuration trustedkey/\n  requestkey/controlkey values are not properly validated.\n* CVE-2016-2518, bsc#977457: Crafted addpeer with hmode \u003e 7\n  causes array wraparound with MATCH_ASSOC.\n* CVE-2016-2519, bsc#977458: ctl_getitem() return value not\n  always checked.\n* This update also improves the fixes for:\n  CVE-2015-7704, CVE-2015-7705, CVE-2015-7974\n\nBugs fixed:\n- Restrict the parser in the startup script to the first\n  occurrance of 'keys' and 'controlkey' in ntp.conf (bsc#957226).\n","status":"published","published":"2016-05-12T14:58:24Z","modified":"2026-02-04T02:42:43.615706Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"SUSE-SU-2016:1311-1","title":"Security update for ntp","description":"\nThis network time protocol server ntp was updated to 4.2.8p6 to fix the following\nissues:\n\nAlso yast2-ntp-client was updated to match some sntp syntax changes. (bsc#937837)\n\nMajor functional changes:\n- The 'sntp' commandline tool changed its option handling in a major way.\n- 'controlkey 1' is added during update to ntp.conf to allow sntp to work.\n- The local clock is being disabled during update.\n- ntpd is no longer running chrooted.\n\n\nOther functional changes:\n- ntp-signd is installed.\n- 'enable mode7' can be added to the configuration to allow ntdpc to work as compatibility mode option.\n- 'kod' was removed from the default restrictions.\n- SHA1 keys are used by default instead of MD5 keys.\n\nThese security issues were fixed:\n- CVE-2015-5219: An endless loop due to incorrect precision to double conversion (bsc#943216).\n- CVE-2015-8158: Fixed potential infinite loop in ntpq (bsc#962966).\n- CVE-2015-8138: Zero Origin Timestamp Bypass (bsc#963002).\n- CVE-2015-7979: Off-path Denial of Service (DoS) attack on authenticated broadcast mode (bsc#962784).\n- CVE-2015-7978: Stack exhaustion in recursive traversal of restriction list (bsc#963000).\n- CVE-2015-7977: reslist NULL pointer dereference (bsc#962970).\n- CVE-2015-7976: ntpq saveconfig command allows dangerous characters in filenames (bsc#962802).\n- CVE-2015-7975: nextvar() missing length check (bsc#962988).\n- CVE-2015-7974: Skeleton Key: Missing key check allows impersonation between authenticated peers (bsc#962960).\n- CVE-2015-7973: Replay attack on authenticated broadcast mode (bsc#962995).\n- CVE-2015-8140: ntpq vulnerable to replay attacks (bsc#962994).\n- CVE-2015-8139: Origin Leak: ntpq and ntpdc, disclose origin (bsc#962997).\n- CVE-2015-5300: MITM attacker could have forced ntpd to make a step larger than the panic threshold (bsc#951629).\n- CVE-2015-7871: NAK to the Future: Symmetric association authentication bypass via crypto-NAK (bsc#951608).\n- CVE-2015-7855: decodenetnum() will ASSERT botch instead of returning FAIL on some bogus values (bsc#951608).\n- CVE-2015-7854: Password Length Memory Corruption Vulnerability (bsc#951608).\n- CVE-2015-7853: Invalid length data provided by a custom refclock driver could cause a buffer overflow (bsc#951608).\n- CVE-2015-7852: ntpq atoascii() Memory Corruption Vulnerability (bsc#951608).\n- CVE-2015-7851: saveconfig Directory Traversal Vulnerability (bsc#951608).\n- CVE-2015-7850: remote config logfile-keyfile (bsc#951608).\n- CVE-2015-7849: trusted key use-after-free (bsc#951608).\n- CVE-2015-7848: mode 7 loop counter underrun (bsc#951608).\n- CVE-2015-7701: Slow memory leak in CRYPTO_ASSOC (bsc#951608).\n- CVE-2015-7703: configuration directives 'pidfile' and 'driftfile' should only be allowed locally (bsc#951608).\n- CVE-2015-7704, CVE-2015-7705: Clients that receive a KoD should validate the origin timestamp field (bsc#951608).\n- CVE-2015-7691, CVE-2015-7692, CVE-2015-7702: Incomplete autokey data packet length checks (bsc#951608).\n\nThese non-security issues were fixed:\n- fate#320758 bsc#975981: Enable compile-time support for MS-SNTP (--enable-ntp-signd).\n  This replaces the w32 patches in 4.2.4 that added the authreg\n  directive.\n- bsc#962318: Call /usr/sbin/sntp with full path to synchronize in start-ntpd.\n  When run as cron job, /usr/sbin/ is not in the path, which caused\n  the synchronization to fail.\n- bsc#782060: Speedup ntpq.\n- bsc#916617: Add /var/db/ntp-kod.\n- bsc#956773: Add ntp-ENOBUFS.patch to limit a warning that might happen quite a lot on loaded systems.\n- bsc#951559,bsc#975496: Fix the TZ offset output of sntp during DST.\n- Add ntp-fork.patch and build with threads disabled to allow name resolution even when running chrooted.\n- Add a controlkey line to /etc/ntp.conf if one does not already exist to allow runtime configuuration via ntpq.\n- bsc#946386: Temporarily disable memlock to avoid problems due to high memory usage during name resolution.\n- bsc#905885: Use SHA1 instead of MD5 for symmetric keys.\n- Improve runtime configuration:\n  * Read keytype from ntp.conf\n  * Don't write ntp keys to syslog.\n- Fix legacy action scripts to pass on command line arguments.\n- bsc#944300: Remove 'kod' from the restrict line in ntp.conf.\n- bsc#936327: Use ntpq instead of deprecated ntpdc in start-ntpd.\n- Don't let 'keysdir' lines in ntp.conf trigger the 'keys' parser.\n- Disable mode 7 (ntpdc) again, now that we don't use it anymore.\n- Add 'addserver' as a new legacy action.\n- bsc#910063: Fix the comment regarding addserver in ntp.conf.\n- bsc#926510: Disable chroot by default.\n- bsc#920238: Enable ntpdc for backwards compatibility.\n- bsc#784760: Remove local clock from default configuration.\n- bsc#942441/fate#319496: Require perl-Socket6.\n- Improve runtime configuration:\n  * Read keytype from ntp.conf\n  * Don't write ntp keys to syslog.\n- bsc#920183: Allow -4 and -6 address qualifiers in 'server' directives.\n- Use upstream ntp-wait, because our version is incompatible with\n  the new ntpq command line syntax.\n","status":"published","published":"2016-05-17T09:29:35Z","modified":"2026-02-04T04:38:27.911087Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"SUSE-SU-2016:1471-1","title":"Security update for ntp","description":"\nThis update for ntp fixes the following issues: \n\n- Separate the creation of ntp.keys and key #1 in it to avoid\n  problems when upgrading installations that have the file, but\n  no key #1, which is needed e.g. by 'rcntp addserver'.\n\n- Update to 4.2.8p7 (bsc#977446):\n  * CVE-2016-1547, bsc#977459:\n    Validate crypto-NAKs, AKA: CRYPTO-NAK DoS.\n  * CVE-2016-1548, bsc#977461: Interleave-pivot\n  * CVE-2016-1549, bsc#977451:\n    Sybil vulnerability: ephemeral association attack.\n  * CVE-2016-1550, bsc#977464: Improve NTP security against buffer\n    comparison timing attacks.\n  * CVE-2016-1551, bsc#977450:\n    Refclock impersonation vulnerability\n  * CVE-2016-2516, bsc#977452: Duplicate IPs on unconfig\n    directives will cause an assertion botch in ntpd.\n  * CVE-2016-2517, bsc#977455: remote configuration trustedkey/\n    requestkey/controlkey values are not properly validated.\n  * CVE-2016-2518, bsc#977457: Crafted addpeer with hmode \u003e 7\n    causes array wraparound with MATCH_ASSOC.\n  * CVE-2016-2519, bsc#977458: ctl_getitem() return value not\n    always checked.\n  * integrate ntp-fork.patch\n  * Improve the fixes for:\n    CVE-2015-7704, CVE-2015-7705, CVE-2015-7974\n- Restrict the parser in the startup script to the first\n  occurrance of 'keys' and 'controlkey' in ntp.conf (bsc#957226).\n\n","status":"published","published":"2016-06-01T12:36:52Z","modified":"2026-02-04T03:05:59.062347Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"SUSE-SU-2016:1568-1","title":"Security update for ntp","description":"ntp was updated to version 4.2.8p8 to fix 17 security issues.\n\nThese security issues were fixed:\n- CVE-2016-4956: Broadcast interleave (bsc#982068).\n- CVE-2016-2518: Crafted addpeer with hmode \u003e 7 causes array wraparound with MATCH_ASSOC (bsc#977457).\n- CVE-2016-2519: ctl_getitem() return value not always checked (bsc#977458).\n- CVE-2016-4954: Processing spoofed server packets (bsc#982066).\n- CVE-2016-4955: Autokey association reset (bsc#982067).\n- 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).\n- CVE-2016-4957: CRYPTO_NAK crash (bsc#982064).\n- CVE-2016-2516: Duplicate IPs on unconfig directives will cause an assertion botch (bsc#977452).\n- CVE-2016-2517: Remote configuration trustedkey/requestkey values are not properly validated (bsc#977455).\n- CVE-2016-4953: Bad authentication demobilizes ephemeral associations (bsc#982065).\n- CVE-2016-1547: CRYPTO-NAK DoS (bsc#977459).\n- CVE-2016-1551: Refclock impersonation vulnerability, AKA: refclock-peering (bsc#977450).\n- CVE-2016-1550: Improve NTP security against buffer comparison timing attacks, authdecrypt-timing, AKA: authdecrypt-timing (bsc#977464).\n- CVE-2016-1548: Interleave-pivot - MITIGATION ONLY (bsc#977461).\n- CVE-2016-1549: Sybil vulnerability: ephemeral association attack, AKA: ntp-sybil - MITIGATION ONLY (bsc#977451).\n\nThis release also contained improved patches for CVE-2015-7704, CVE-2015-7705, CVE-2015-7974.\n\nThese non-security issues were fixed:\n- bsc#979302: Change the process name of the forking DNS worker process to avoid the impression that ntpd is started twice.\n- bsc#981422: Don't ignore SIGCHILD because it breaks wait().\n- bsc#979981: ntp-wait does not accept fractional seconds, so use 1 instead of 0.2 in ntp-wait.service.\n- Separate the creation of ntp.keys and key #1 in it to avoid problems when upgrading installations that have the file, but no key #1, which is needed e.g. by 'rcntp addserver'.\n- bsc#957226: Restrict the parser in the startup script to the first occurrance of 'keys' and 'controlkey' in ntp.conf.\n  ","status":"published","published":"2016-06-14T06:45:46Z","modified":"2026-02-04T02:54:59.789302Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"USN-2783-1","title":"ntp vulnerabilities","description":"Aleksis Kauppinen discovered that NTP incorrectly handled certain remote\nconfig packets. In a non-default configuration, a remote authenticated\nattacker could possibly use this issue to cause NTP to crash, resulting in\na denial of service. (CVE-2015-5146)\n\nMiroslav Lichvar discovered that NTP incorrectly handled logconfig\ndirectives. In a non-default configuration, a remote authenticated attacker\ncould possibly use this issue to cause NTP to crash, resulting in a denial\nof service. (CVE-2015-5194)\n\nMiroslav Lichvar discovered that NTP incorrectly handled certain statistics\ntypes. In a non-default configuration, a remote authenticated attacker\ncould possibly use this issue to cause NTP to crash, resulting in a denial\nof service. (CVE-2015-5195)\n\nMiroslav Lichvar discovered that NTP incorrectly handled certain file\npaths. In a non-default configuration, a remote authenticated attacker\ncould possibly use this issue to cause NTP to crash, resulting in a denial\nof service, or overwrite certain files. (CVE-2015-5196, CVE-2015-7703)\n\nMiroslav Lichvar discovered that NTP incorrectly handled certain packets.\nA remote attacker could possibly use this issue to cause NTP to hang,\nresulting in a denial of service. (CVE-2015-5219)\n\nAanchal Malhotra, Isaac E. Cohen, and Sharon Goldberg discovered that NTP\nincorrectly handled restarting after hitting a panic threshold. A remote\nattacker could possibly use this issue to alter the system time on clients.\n(CVE-2015-5300)\n\nIt was discovered that NTP incorrectly handled autokey data packets. A\nremote attacker could possibly use this issue to cause NTP to crash,\nresulting in a denial of service, or possibly execute arbitrary code.\n(CVE-2015-7691, CVE-2015-7692, CVE-2015-7702)\n\nIt was discovered that NTP incorrectly handled memory when processing\ncertain autokey messages. A remote attacker could possibly use this issue\nto cause NTP to consume memory, resulting in a denial of service.\n(CVE-2015-7701)\n\nAanchal Malhotra, Isaac E. Cohen, and Sharon Goldberg discovered that NTP\nincorrectly handled rate limiting. A remote attacker could possibly use\nthis issue to cause clients to stop updating their clock. (CVE-2015-7704,\nCVE-2015-7705)\n\nYves Younan discovered that NTP incorrectly handled logfile and keyfile\ndirectives. In a non-default configuration, a remote authenticated attacker\ncould possibly use this issue to cause NTP to enter a loop, resulting in a\ndenial of service. (CVE-2015-7850)\n\nYves Younan and Aleksander Nikolich discovered that NTP incorrectly handled\nascii conversion. A remote attacker could possibly use this issue to cause\nNTP to crash, resulting in a denial of service, or possibly execute\narbitrary code. (CVE-2015-7852)\n\nYves Younan discovered that NTP incorrectly handled reference clock memory.\nA malicious refclock could possibly use this issue to cause NTP to crash,\nresulting in a denial of service, or possibly execute arbitrary code.\n(CVE-2015-7853)\n\nJohn D \"Doug\" Birdwell discovered that NTP incorrectly handled decoding\ncertain bogus values. An attacker could possibly use this issue to cause\nNTP to crash, resulting in a denial of service. (CVE-2015-7855)\n\nStephen Gray discovered that NTP incorrectly handled symmetric association\nauthentication. A remote attacker could use this issue to possibly bypass\nauthentication and alter the system clock. (CVE-2015-7871)\n\nIn the default installation, attackers would be isolated by the NTP\nAppArmor profile.\n","status":"published","published":"2015-10-27T17:02:35Z","modified":"2026-02-10T04:40:56Z","updated_at":"2026-11-02T16:58:10.303275Z"}]}}