{"id":"CVE-2016-1551","aliases":["EUVD-2016-2646","GHSA-xhrh-m85j-g7hf","SUSE-SU-2016:1278-1","SUSE-SU-2016:1291-1","SUSE-SU-2016:1471-1","SUSE-SU-2016:1568-1","openSUSE-SU-2024:10181-1"],"status":"published","title":"ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying...","description":"ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks. Because reference clocks are treated like other peers and stored in the same structure, any packet with a source ip address of a reference clock (127.127.1.1 for example) that reaches the receive() function will match that reference clock's peer record and will be treated as a trusted peer. Any system that lacks the typical martian packet filtering which would block these packets is in danger of having its time controlled by an attacker.","severity":{"version":"3.0","score":3.7,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02233,"percentile":0.82889,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-254"],"published":"2016-05-11T12:37:44Z","modified":"2026-10-24T10:30:44Z","affected":[{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 11 SP4","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.8p7-11.1"}]}],"bundled":12},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 11 SP4","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.8p7-11.1"}]}],"bundled":12},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Desktop 12 SP1","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.8p7-11.1"}]}],"bundled":12},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 12 SP1","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.8p7-11.1"}]}],"bundled":12},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12 SP1","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.8p7-11.1"}]}],"bundled":12},{"source":"osv","ecosystem":"SUSE:OpenStack Cloud 5","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.8p7-44.1"}]}],"bundled":12},{"source":"osv","ecosystem":"SUSE:Manager 2.1","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.8p7-44.1"}]}],"bundled":12},{"source":"osv","ecosystem":"SUSE:Manager Proxy 2.1","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.8p7-44.1"}]}],"bundled":12},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 11 SP2-LTSS","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.8p7-44.1"}]}],"bundled":12},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 11 SP3-LTSS","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.8p7-44.1"}]}],"bundled":12},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 11 SP3-TERADATA","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.8p7-44.1"}]}],"bundled":12},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Desktop 12","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.8p8-46.8.1"}]}],"bundled":17},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 12","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.8p8-46.8.1"}]}],"bundled":17},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 12","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.8p8-46.8.1"}]}],"bundled":17},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.8p9-1.1"}]}],"bundled":60}],"products":[{"vendor":"ntp","product":"ntp"},{"vendor":"ntp project","product":"ntp"},{"vendor":"ntpsec","product":"ntpsec"},{"vendor":"ntpsec project","product":"ntpsec"}],"references":[{"url":"http://www.securityfocus.com/bid/88219","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"http://www.talosintelligence.com/reports/TALOS-2016-0132/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"http://www.securitytracker.com/id/1035705","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","web"]},{"url":"http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20171004-0002/","tags":["x_refsource_CONFIRM","x_transferred","advisory"]},{"url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc","tags":["vendor-advisory","x_refsource_FREEBSD","x_transferred","advisory"]},{"url":"https://security.gentoo.org/glsa/201607-15","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-1551"},{"url":"https://security.netapp.com/advisory/ntap-20171004-0002"},{"url":"http://www.talosintelligence.com/reports/TALOS-2016-0132"},{"url":"https://github.com/advisories/GHSA-xhrh-m85j-g7hf"},{"url":"https://www.suse.com/support/update/announcement/2016/suse-su-20161278-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/957226","tags":["report"]},{"url":"https://bugzilla.suse.com/977446","tags":["report"]},{"url":"https://bugzilla.suse.com/977450","tags":["report"]},{"url":"https://bugzilla.suse.com/977451","tags":["report"]},{"url":"https://bugzilla.suse.com/977452","tags":["report"]},{"url":"https://bugzilla.suse.com/977455","tags":["report"]},{"url":"https://bugzilla.suse.com/977457","tags":["report"]},{"url":"https://bugzilla.suse.com/977458","tags":["report"]},{"url":"https://bugzilla.suse.com/977459","tags":["report"]},{"url":"https://bugzilla.suse.com/977461","tags":["report"]},{"url":"https://bugzilla.suse.com/977464","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7704","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7705","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7974","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-1547","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-1548","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-1549","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-1550","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-1551","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-2516","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-2517","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-2518","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-2519","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2016/suse-su-20161291-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2016/suse-su-20161471-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2016/suse-su-20161568-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/962960","tags":["report"]},{"url":"https://bugzilla.suse.com/979302","tags":["report"]},{"url":"https://bugzilla.suse.com/979981","tags":["report"]},{"url":"https://bugzilla.suse.com/981422","tags":["report"]},{"url":"https://bugzilla.suse.com/982064","tags":["report"]},{"url":"https://bugzilla.suse.com/982065","tags":["report"]},{"url":"https://bugzilla.suse.com/982066","tags":["report"]},{"url":"https://bugzilla.suse.com/982067","tags":["report"]},{"url":"https://bugzilla.suse.com/982068","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4953","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4954","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4955","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4956","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4957","tags":["web"]},{"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-2015-5300","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7691","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7692","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7701","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7702","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7703","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7848","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7849","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7850","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7851","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7852","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7853","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7854","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7855","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7871","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7973","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7975","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7976","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7977","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7978","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7979","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-8138","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-8158","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-2016-1551","description":"ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks. Because reference clocks are treated like other peers and stored in the same structure, any packet with a source ip address of a reference clock (127.127.1.1 for example) that reaches the receive() function will match that reference clock's peer record and will be treated as a trusted peer. Any system that lacks the typical martian packet filtering which would block these packets is in danger of having its time controlled by an attacker.","status":"published","published":"2017-01-27T17:00:00Z","modified":"2024-08-05T23:02:12.002Z","updated_at":"2026-11-02T14:33:35.841056Z"}],"euvd":[{"id":"EUVD-2016-2646","description":"ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks. Because reference clocks are treated like other peers and stored in the same structure, any packet with a source ip address of a reference clock (127.127.1.1 for example) that reaches the receive() function will match that reference clock's peer record and will be treated as a trusted peer. Any system that lacks the typical martian packet filtering which would block these packets is in danger of having its time controlled by an attacker.","status":"published","published":"2017-01-27T17:00:00Z","modified":"2024-08-05T23:02:12Z","updated_at":"2026-11-03T02:22:56.538135Z"}],"ghsa":[{"id":"GHSA-xhrh-m85j-g7hf","title":"ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying...","description":"ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks. Because reference clocks are treated like other peers and stored in the same structure, any packet with a source ip address of a reference clock (127.127.1.1 for example) that reaches the receive() function will match that reference clock's peer record and will be treated as a trusted peer. Any system that lacks the typical martian packet filtering which would block these packets is in danger of having its time controlled by an attacker.","status":"published","published":"2022-05-17T00:22:32Z","modified":"2025-04-20T03:31:38Z","cvss":[{"version":"3.0","score":3.7,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"low"}],"updated_at":"2026-11-02T15:01:38.976438Z"}],"nvd":[{"id":"CVE-2016-1551","description":"ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks. Because reference clocks are treated like other peers and stored in the same structure, any packet with a source ip address of a reference clock (127.127.1.1 for example) that reaches the receive() function will match that reference clock's peer record and will be treated as a trusted peer. Any system that lacks the typical martian packet filtering which would block these packets is in danger of having its time controlled by an attacker.","status":"published","published":"2017-01-27T17:59:00.227Z","modified":"2026-06-17T00:42:09.3Z","cvss":[{"version":"3.0","score":3.7,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"low","assessor":"primary"},{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:N/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-254"],"updated_at":"2026-11-02T14:03:35.029632Z"}],"osv":[{"id":"CVE-2016-1551","description":"ntpd in NTP 4.2.8p3 and NTPsec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 relies on the underlying operating system to protect it from requests that impersonate reference clocks. Because reference clocks are treated like other peers and stored in the same structure, any packet with a source ip address of a reference clock (127.127.1.1 for example) that reaches the receive() function will match that reference clock's peer record and will be treated as a trusted peer. Any system that lacks the typical martian packet filtering which would block these packets is in danger of having its time controlled by an attacker.","status":"published","published":"2017-01-27T17:59:00.227Z","modified":"2026-10-24T10:30:44.120363075Z","cvss":[{"version":"3.0","score":3.7,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","level":"low"}],"updated_at":"2026-11-02T15:44:02.114472Z"},{"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":"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-2016:1471-1","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"}]}}