{"id":"CVE-2020-11868","details":"ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows an off-path attacker to block unauthenticated synchronization via a server mode packet with a spoofed source IP address, because transmissions are rescheduled even when a packet lacks a valid origin timestamp.","modified":"2026-03-15T22:30:21.596225Z","published":"2020-04-17T04:15:10.987Z","related":["MGASA-2020-0212","SUSE-SU-2020:14415-1","SUSE-SU-2020:1805-1","SUSE-SU-2020:1823-1","openSUSE-SU-2020:0934-1","openSUSE-SU-2020:1007-1","openSUSE-SU-2024:11102-1"],"references":[{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2020/05/msg00004.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202007-12"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20200424-0002/"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.html"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1716665"},{"type":"FIX","url":"http://support.ntp.org/bin/view/Main/NtpBug3592"},{"type":"FIX","url":"https://www.oracle.com//security-alerts/cpujul2021.html"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-11868.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"4.2.7"}]},{"events":[{"introduced":"4.3.98"},{"fixed":"4.3.100"}]},{"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-p10"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p11"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p12"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p13"}]},{"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"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p4"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p5"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p6"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p7"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p8"}]},{"events":[{"introduced":"0"},{"last_affected":"4.2.8-p9"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"7.2"}]},{"events":[{"introduced":"7.2"}]},{"events":[{"introduced":"7.2"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"15.1"}]},{"events":[{"introduced":"0"},{"last_affected":"15.2"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}