{"id":"CVE-2016-4954","details":"The process_packet function in ntp_proto.c in ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (peer-variable modification) by sending spoofed packets from many source IP addresses in a certain scenario, as demonstrated by triggering an incorrect leap indication.","modified":"2026-03-15T22:22:20.632248Z","published":"2016-07-05T01:59:01.267Z","related":["MGASA-2016-0219","SUSE-SU-2016:1563-1","SUSE-SU-2016:1568-1","SUSE-SU-2016:1584-1","SUSE-SU-2016:1602-1","openSUSE-SU-2024:10181-1"],"references":[{"type":"WEB","url":"http://www.securityfocus.com/archive/1/archive/1/538599/100/0/threaded"},{"type":"WEB","url":"http://www.securityfocus.com/archive/1/archive/1/540683/100/0/threaded"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html"},{"type":"WEB","url":"http://www.securityfocus.com/archive/1/538600/100/0/threaded"},{"type":"WEB","url":"https://www.kb.cert.org/vuls/id/321640"},{"type":"WEB","url":"http://packetstormsecurity.com/files/137322/FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.html"},{"type":"WEB","url":"http://www.securityfocus.com/archive/1/538599/100/0/threaded"},{"type":"WEB","url":"http://www.securityfocus.com/archive/1/540683/100/0/threaded"},{"type":"WEB","url":"http://www.securityfocus.com/archive/1/archive/1/538600/100/0/threaded"},{"type":"WEB","url":"http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpd"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORAMN3Q7TVJ54MBYF75XCJOE3DP7LYHT/"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3EYJQHJZ2KTVQ7ICEFHXTLZ36MRASWX/"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNWGCQLW2VY72NIUYMJOCAKJKTXHDUK2/"},{"type":"WEB","url":"http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.html"},{"type":"ADVISORY","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf"},{"type":"ADVISORY","url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html"},{"type":"ADVISORY","url":"http://www.ubuntu.com/usn/USN-3096-1"},{"type":"ADVISORY","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf"},{"type":"ADVISORY","url":"https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03757en_us"},{"type":"ADVISORY","url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201607-15"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html"},{"type":"ADVISORY","url":"http://www.securitytracker.com/id/1036037"},{"type":"ADVISORY","url":"http://support.ntp.org/bin/view/Main/SecurityNotice"},{"type":"ADVISORY","url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html"},{"type":"ADVISORY","url":"http://www.kb.cert.org/vuls/id/321640"},{"type":"ADVISORY","url":"http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html"},{"type":"REPORT","url":"http://bugs.ntp.org/3044"},{"type":"FIX","url":"http://support.ntp.org/bin/view/Main/NtpBug3044"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-4954.json","unresolved_ranges":[{"events":[{"introduced":"4.2.0"},{"fixed":"4.2.8"}]},{"events":[{"introduced":"4.3.0"},{"fixed":"4.3.93"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-NA"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1\\-beta1"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1\\-beta2"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1\\-beta3"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1\\-beta4"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1\\-beta5"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1\\-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p1\\-rc2"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p2"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p2\\-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p2\\-rc2"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p2\\-rc3"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p3"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p3\\-rc1"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p3\\-rc2"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p3\\-rc3"}]},{"eve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