{"id":"CVE-2016-7426","aliases":["DEBIAN-CVE-2016-7426","EUVD-2016-8279","GHSA-8wjh-3x3g-6pjf","MGASA-2016-0414","RHSA-2017:0252","SUSE-SU-2016:3193-1","SUSE-SU-2016:3195-1","SUSE-SU-2016:3196-1","SUSE-SU-2017:0255-1","UBUNTU-CVE-2016-7426","USN-3349-1","openSUSE-SU-2024:10181-1"],"status":"published","title":"NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting...","description":"NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.","severity":{"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","from":"nvd"},"epss":{"day":"2026-11-08","score":0.12367,"percentile":0.96229,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400"],"published":"2016-12-08T07:33:24Z","modified":"2026-08-04T06:04:08Z","fixes":[{"ecosystem":"Debian:11","package":"ntp","fixed_in":["1:4.2.8p9+dfsg-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:14.04:LTS","package":"ntp","fixed_in":["1:4.2.6.p5+dfsg-3ubuntu2.14.04.11"],"sources":["osv"]},{"ecosystem":"Ubuntu:16.04:LTS","package":"ntp","fixed_in":["1:4.2.8p4+dfsg-3ubuntu5.5"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:11","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.2.8p9+dfsg-1"}]}]},{"source":"osv","ecosystem":"Mageia:5","package":"ntp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.2.6p5-24.7.mga5"}]}],"bundled":4},{"source":"osv","ecosystem":"Red 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Entry","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-7426","tags":["advisory"]},{"url":"https://usn.ubuntu.com/3707-2"},{"url":"http://nwtime.org/ntp428p9_release"},{"url":"https://github.com/advisories/GHSA-8wjh-3x3g-6pjf"},{"url":"https://security-tracker.debian.org/tracker/CVE-2016-7426","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2016-0414.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=19843","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1397345","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1397341","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1397319","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1398350","tags":["report"]},{"url":"http://support.ntp.org/bin/view/Main/SecurityNotice#November_2016_ntp_4_2_8p9_NTP_Se","tags":["web"]},{"url":"https://access.redhat.com/errata/RHSA-2017:0252","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#moderate","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1397347","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2017/rhsa-2017_0252.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2016-7426","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-7426","tags":["advisory","report"]},{"url":"https://access.redhat.com/security/cve/CVE-2016-7429","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-7429","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-7429","tags":["advisory"]},{"url":"http://support.ntp.org/bin/view/Main/NtpBug3072","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2016-7433","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-7433","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-7433","tags":["advisory"]},{"url":"http://support.ntp.org/bin/view/Main/NtpBug3067","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2016-9310","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-9310","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-9310","tags":["advisory"]},{"url":"http://support.ntp.org/bin/view/Main/NtpBug3118","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2016-9311","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-9311","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-9311","tags":["advisory"]},{"url":"http://support.ntp.org/bin/view/Main/NtpBug3119","tags":["article"]},{"url":"https://www.suse.com/support/update/announcement/2016/suse-su-20163193-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1009434","tags":["report"]},{"url":"https://bugzilla.suse.com/1011377","tags":["report"]},{"url":"https://bugzilla.suse.com/1011390","tags":["report"]},{"url":"https://bugzilla.suse.com/1011395","tags":["report"]},{"url":"https://bugzilla.suse.com/1011398","tags":["report"]},{"url":"https://bugzilla.suse.com/1011404","tags":["report"]},{"url":"https://bugzilla.suse.com/1011406","tags":["report"]},{"url":"https://bugzilla.suse.com/1011411","tags":["report"]},{"url":"https://bugzilla.suse.com/1011417","tags":["report"]},{"url":"https://bugzilla.suse.com/943216","tags":["report"]},{"url":"https://bugzilla.suse.com/956365","tags":["report"]},{"url":"https://bugzilla.suse.com/981252","tags":["report"]},{"url":"https://bugzilla.suse.com/988028","tags":["report"]},{"url":"https://bugzilla.suse.com/992038","tags":["report"]},{"url":"https://bugzilla.suse.com/992606","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2015-5219","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-8139","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-8140","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"]},{"url":"https://www.suse.com/support/update/announcement/2016/suse-su-20163195-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2016/suse-su-20163196-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2017/suse-su-20170255-1/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2016-7426","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-3349-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-3707-2","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2016-2519","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-7427","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-7428","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-7429","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-7431","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-7433","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-7434","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-9042","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-9310","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-9311","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-6458","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-6460","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-6462","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-6463","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2017-6464","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-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-2015-7704","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-7705","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-2015-7974","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-2016-1547","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/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"]}],"sources":{"cve":[{"id":"CVE-2016-7426","description":"NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.","status":"published","published":"2017-01-13T16:00:00Z","modified":"2024-08-06T01:57:47.647Z","updated_at":"2026-11-02T14:33:36.802481Z"}],"euvd":[{"id":"EUVD-2016-8279","description":"NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.","status":"published","published":"2017-01-13T16:00:00Z","modified":"2024-08-06T01:57:47Z","updated_at":"2026-11-03T02:22:32.939633Z"}],"ghsa":[{"id":"GHSA-8wjh-3x3g-6pjf","title":"NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting...","description":"NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.","status":"published","published":"2022-05-13T01:25:43Z","modified":"2025-04-20T03:32:15Z","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-400"],"updated_at":"2026-11-02T15:01:39.626411Z"}],"nvd":[{"id":"CVE-2016-7426","description":"NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.","status":"published","published":"2017-01-13T16:59:00.323Z","modified":"2026-06-17T00:53:02.833Z","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":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:03:33.686843Z"}],"osv":[{"id":"CVE-2016-7426","description":"NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.","status":"published","published":"2017-01-13T16:59:00.323Z","modified":"2026-04-16T06:20:55.942229515Z","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":"2026-11-02T15:44:02.776224Z"},{"id":"DEBIAN-CVE-2016-7426","description":"NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.","status":"published","published":"2017-01-13T16:59:00.323Z","modified":"2026-08-04T06:04:08.119035723Z","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":"2026-11-02T15:45:27.910042Z"},{"id":"RHSA-2017:0252","title":"Red Hat Security Advisory: ntp security update","status":"published","published":"2024-09-15T23:55:45Z","modified":"2026-06-26T12:21:53.451273611Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:53:04.262457Z"},{"id":"UBUNTU-CVE-2016-7426","description":"NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.","status":"published","published":"2017-01-13T00:00:00Z","modified":"2026-02-04T04:22:03.126514Z","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":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:54:12.994319Z"},{"id":"MGASA-2016-0414","title":"Updated ntp packages fix security vulnerabilities","description":"When ntpd is configured with rate limiting for all associations (restrict\ndefault limited in ntp.conf), the limits are applied also to responses\nreceived from its configured sources. An attacker who knows the sources\n(e.g., from an IPv4 refid in server response) and knows the system is\n(mis)configured in this way can periodically send packets with spoofed\nsource address to keep the rate limiting activated and prevent ntpd from\naccepting valid responses from its sources (CVE-2016-7426).\n\nWhen ntpd receives a server response on a socket that corresponds to a\ndifferent interface than was used for the request, the peer structure is\nupdated to use the interface for new requests. If ntpd is running on a\nhost with multiple interfaces in separate networks and the operating\nsystem doesn't check source address in received packets (e.g. rp_filter\non Linux is set to 0), an attacker that knows the address of the source\ncan send a packet with spoofed source address which will cause ntpd to\nselect wrong interface for the source and prevent it from sending new\nrequests until the list of interfaces is refreshed, which happens on\nrouting changes or every 5 minutes by default. If the attack is repeated\noften enough (once per second), ntpd will not be able to synchronize\nwith the source (CVE-2016-7429).\n\nAn exploitable configuration modification vulnerability exists in the\ncontrol mode (mode 6) functionality of ntpd. If, against long-standing\nBCP recommendations, \"restrict default noquery ...\" is not specified,\na specially crafted control mode packet can set ntpd traps, providing\ninformation disclosure and DDoS amplification, and unset ntpd traps,\ndisabling legitimate monitoring. A remote, unauthenticated, network\nattacker can trigger this vulnerability (CVE-2016-9310).\n\nIf trap service, disabled by default, has been explicitly enabled, an\nattacker can send a specially crafted packet to cause a null pointer\ndereference that will crash ntpd, resulting in a denial of service\n(CVE-2016-9311).\n","status":"published","published":"2016-12-08T07:33:24Z","modified":"2026-04-16T06:24:45.962739873Z","updated_at":"2026-11-02T15:49:40.103088Z"},{"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-2016:3193-1","title":"Security update for ntp","description":"\nThis update for ntp fixes the following issues:\n\n- Simplify ntpd's search for its own executable to prevent AppArmor\n  warnings (bsc#956365).\n\nSecurity issues fixed (update to 4.2.8p9):\n\n- CVE-2016-9311, CVE-2016-9310, bsc#1011377: Mode 6\n  unauthenticated trap information disclosure and DDoS vector.\n- CVE-2016-7427, bsc#1011390:\n  Broadcast Mode Replay Prevention DoS.\n- CVE-2016-7428, bsc#1011417:\n  Broadcast Mode Poll Interval Enforcement DoS.\n- CVE-2016-7431, bsc#1011395:\n  Regression: 010-origin: Zero Origin Timestamp Bypass.\n- CVE-2016-7434, bsc#1011398:\n  Null pointer dereference in _IO_str_init_static_internal().\n- CVE-2016-7429, bsc#1011404: Interface selection attack.\n- CVE-2016-7426, bsc#1011406:\n  Client rate limiting and server responses.\n- CVE-2016-7433, bsc#1011411: Reboot sync calculation problem.\n- CVE-2015-5219: An endless loop due to incorrect precision to\n  double conversion (bsc#943216).\n- CVE-2015-8140: ntpq vulnerable to replay attacks.\n- CVE-2015-8139: Origin Leak: ntpq and ntpdc, disclose origin.\n- CVE-2015-5219: An endless loop due to incorrect precision to\n  double conversion (bsc#943216).\n\nNon-security issues fixed:\n\n- Fix a spurious error message.\n- Other bugfixes, see /usr/share/doc/packages/ntp/ChangeLog.\n- Fix a regression in 'trap' (bsc#981252).\n- Reduce the number of netlink groups to listen on for changes to\n  the local network setup (bsc#992606).\n- Fix segfault in 'sntp -a' (bsc#1009434).\n- Silence an OpenSSL version warning (bsc#992038).\n- Make the resolver task change user and group IDs to the same\n  values as the main task. (bsc#988028)\n\n","status":"published","published":"2016-12-19T16:07:30Z","modified":"2026-02-04T03:40:02.425004Z","updated_at":"2026-11-02T15:53:43.83457Z"},{"id":"SUSE-SU-2016:3195-1","title":"Security update for ntp","description":"\nThis update for ntp fixes the following issues:\n\nntp was updated to 4.2.8p9.\n\nSecurity issues fixed:\n\n- CVE-2016-9311, CVE-2016-9310, bsc#1011377: Mode 6\n  unauthenticated trap information disclosure and DDoS vector.\n- CVE-2016-7427, bsc#1011390:\n  Broadcast Mode Replay Prevention DoS.\n- CVE-2016-7428, bsc#1011417:\n  Broadcast Mode Poll Interval Enforcement DoS.\n- CVE-2016-7431, bsc#1011395:\n  Regression: 010-origin: Zero Origin Timestamp Bypass.\n- CVE-2016-7434, bsc#1011398:\n  Null pointer dereference in _IO_str_init_static_internal().\n- CVE-2016-7429, bsc#1011404: Interface selection attack.\n- CVE-2016-7426, bsc#1011406:\n  Client rate limiting and server responses.\n- CVE-2016-7433, bsc#1011411: Reboot sync calculation problem.\n- CVE-2015-5219: An endless loop due to incorrect precision to\n  double conversion (bsc#943216).\n\nNon-security issues fixed:\n\n- Fix a spurious error message.\n- Other bugfixes, see /usr/share/doc/packages/ntp/ChangeLog.\n- Fix a regression in 'trap' (bsc#981252).\n- Reduce the number of netlink groups to listen on for changes to\n  the local network setup (bsc#992606).\n- Fix segfault in 'sntp -a' (bsc#1009434).\n- Silence an OpenSSL version warning (bsc#992038).\n- Make the resolver task change user and group IDs to the same\n  values as the main task. (bsc#988028)\n- Simplify ntpd's search for its own executable to prevent AppArmor\n  warnings (bsc#956365).\n\n","status":"published","published":"2016-12-19T16:08:04Z","modified":"2026-02-04T03:30:53.869251Z","updated_at":"2026-11-02T15:53:43.83457Z"},{"id":"SUSE-SU-2016:3196-1","title":"Security update for ntp","description":"\nThis update for ntp fixes the following issues:\n\nntp was updated to 4.2.8p9.\n\nSecurity issues fixed:\n\n- CVE-2016-9311, CVE-2016-9310, bsc#1011377: Mode 6\n  unauthenticated trap information disclosure and DDoS vector.\n- CVE-2016-7427, bsc#1011390:\n  Broadcast Mode Replay Prevention DoS.\n- CVE-2016-7428, bsc#1011417:\n  Broadcast Mode Poll Interval Enforcement DoS.\n- CVE-2016-7431, bsc#1011395:\n  Regression: 010-origin: Zero Origin Timestamp Bypass.\n- CVE-2016-7434, bsc#1011398:\n  Null pointer dereference in _IO_str_init_static_internal().\n- CVE-2016-7429, bsc#1011404: Interface selection attack.\n- CVE-2016-7426, bsc#1011406:\n  Client rate limiting and server responses.\n- CVE-2016-7433, bsc#1011411: Reboot sync calculation problem.\n- CVE-2015-5219: An endless loop due to incorrect precision to\n  double conversion (bsc#943216).\n\nNon-security issues fixed:\n\n- Fix a spurious error message.\n- Other bugfixes, see /usr/share/doc/packages/ntp/ChangeLog.\n- Fix a regression in 'trap' (bsc#981252).\n- Reduce the number of netlink groups to listen on for changes to\n  the local network setup (bsc#992606).\n- Fix segfault in 'sntp -a' (bsc#1009434).\n- Silence an OpenSSL version warning (bsc#992038).\n- Make the resolver task change user and group IDs to the same\n  values as the main task. (bsc#988028)\n- Simplify ntpd's search for its own executable to prevent AppArmor\n  warnings (bsc#956365).\n\n","status":"published","published":"2016-12-19T16:07:40Z","modified":"2025-05-02T04:04:40.260632Z","updated_at":"2026-11-02T15:53:43.83457Z"},{"id":"SUSE-SU-2017:0255-1","title":"Security update for ntp","description":"\nThis update for ntp fixes the following issues:\n\nntp was updated to 4.2.8p9.\n\nSecurity issues fixed:\n\n- CVE-2016-9311, CVE-2016-9310, bsc#1011377: Mode 6\n  unauthenticated trap information disclosure and DDoS vector.\n- CVE-2016-7427, bsc#1011390:\n  Broadcast Mode Replay Prevention DoS.\n- CVE-2016-7428, bsc#1011417:\n  Broadcast Mode Poll Interval Enforcement DoS.\n- CVE-2016-7431, bsc#1011395:\n  Regression: 010-origin: Zero Origin Timestamp Bypass.\n- CVE-2016-7434, bsc#1011398:\n  Null pointer dereference in _IO_str_init_static_internal().\n- CVE-2016-7429, bsc#1011404: Interface selection attack.\n- CVE-2016-7426, bsc#1011406:\n  Client rate limiting and server responses.\n- CVE-2016-7433, bsc#1011411: Reboot sync calculation problem.\n- CVE-2015-8140: ntpq vulnerable to replay attacks.\n- CVE-2015-8139: Origin Leak: ntpq and ntpdc, disclose origin.\n- CVE-2015-5219: An endless loop due to incorrect precision to\n  double conversion (bsc#943216).\n\nNon-security issues fixed:\n\n- Fix a spurious error message.\n- Other bugfixes, see /usr/share/doc/packages/ntp/ChangeLog.\n- Fix a regression in 'trap' (bsc#981252).\n- Reduce the number of netlink groups to listen on for changes to\n  the local network setup (bsc#992606).\n- Fix segfault in 'sntp -a' (bsc#1009434).\n- Silence an OpenSSL version warning (bsc#992038).\n- Make the resolver task change user and group IDs to the same\n  values as the main task. (bsc#988028)\n- Simplify ntpd's search for its own executable to prevent AppArmor\n  warnings (bsc#956365).\n\n","status":"published","published":"2017-01-23T11:27:30Z","modified":"2026-02-04T03:28:16.725221Z","updated_at":"2026-11-02T15:53:43.83457Z"},{"id":"USN-3349-1","title":"ntp vulnerabilities","description":"Yihan Lian discovered that NTP incorrectly handled certain large request\ndata values. A remote attacker could possibly use this issue to cause NTP\nto crash, resulting in a denial of service. This issue only affected\nUbuntu 16.04 LTS. (CVE-2016-2519)\n\nMiroslav Lichvar discovered that NTP incorrectly handled certain spoofed\naddresses when performing rate limiting. A remote attacker could possibly\nuse this issue to perform a denial of service. This issue only affected\nUbuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10. (CVE-2016-7426)\n\nMatthew Van Gundy discovered that NTP incorrectly handled certain crafted\nbroadcast mode packets. A remote attacker could possibly use this issue to\nperform a denial of service. This issue only affected Ubuntu 14.04 LTS,\nUbuntu 16.04 LTS, and Ubuntu 16.10. (CVE-2016-7427, CVE-2016-7428)\n\nMiroslav Lichvar discovered that NTP incorrectly handled certain responses.\nA remote attacker could possibly use this issue to perform a denial of\nservice. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and\nUbuntu 16.10. (CVE-2016-7429)\n\nSharon Goldberg and Aanchal Malhotra discovered that NTP incorrectly\nhandled origin timestamps of zero. A remote attacker could possibly use\nthis issue to bypass the origin timestamp protection mechanism. This issue\nonly affected Ubuntu 16.10. (CVE-2016-7431)\n\nBrian Utterback, Sharon Goldberg and Aanchal Malhotra discovered that NTP\nincorrectly performed initial sync calculations. This issue only applied\nto Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-7433)\n\nMagnus Stubman discovered that NTP incorrectly handled certain mrulist\nqueries. A remote attacker could possibly use this issue to cause NTP to\ncrash, resulting in a denial of service. This issue only affected Ubuntu\n16.04 LTS and Ubuntu 16.10. (CVE-2016-7434)\n\nMatthew Van Gund discovered that NTP incorrectly handled origin timestamp\nchecks. A remote attacker could possibly use this issue to perform a denial\nof service. This issue only affected Ubuntu Ubuntu 16.10, and Ubuntu 17.04.\n(CVE-2016-9042)\n\nMatthew Van Gundy discovered that NTP incorrectly handled certain control\nmode packets. A remote attacker could use this issue to set or unset traps.\nThis issue only applied to Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu\n16.10. (CVE-2016-9310)\n\nMatthew Van Gundy discovered that NTP incorrectly handled the trap service.\nA remote attacker could possibly use this issue to cause NTP to crash,\nresulting in a denial of service. This issue only applied to Ubuntu 14.04\nLTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-9311)\n\nIt was discovered that NTP incorrectly handled memory when processing long\nvariables. A remote authenticated user could possibly use this issue to\ncause NTP to crash, resulting in a denial of service. (CVE-2017-6458)\n\nIt was discovered that NTP incorrectly handled memory when processing long\nvariables. A remote authenticated user could possibly use this issue to\ncause NTP to crash, resulting in a denial of service. This issue only\napplied to Ubuntu 16.04 LTS, Ubuntu 16.10 and Ubuntu 17.04. (CVE-2017-6460)\n\nIt was discovered that the NTP legacy DPTS refclock driver incorrectly\nhandled the /dev/datum device. A local attacker could possibly use this\nissue to cause a denial of service. (CVE-2017-6462)\n\nIt was discovered that NTP incorrectly handled certain invalid settings\nin a :config directive. A remote authenticated user could possibly use\nthis issue to cause NTP to crash, resulting in a denial of service.\n(CVE-2017-6463)\n\nIt was discovered that NTP incorrectly handled certain invalid mode\nconfiguration directives. A remote authenticated user could possibly use\nthis issue to cause NTP to crash, resulting in a denial of service.\n(CVE-2017-6464)\n","status":"published","published":"2017-07-05T18:19:15Z","modified":"2026-02-10T04:41:09Z","updated_at":"2026-11-02T16:58:13.496563Z"}]}}