{"id":"CVE-2020-13817","details":"ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows remote attackers to cause a denial of service (daemon exit or system time change) by predicting transmit timestamps for use in spoofed packets. The victim must be relying on unauthenticated IPv4 time sources. There must be an off-path attacker who can query time from the victim's ntpd instance.","modified":"2026-03-15T22:32:32.850658Z","published":"2020-06-04T13:15:11.053Z","related":["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":"http://support.ntp.org/bin/view/Main/NtpBug3596"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202007-12"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20200625-0004/"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.html"},{"type":"REPORT","url":"https://bugs.ntp.org/show_bug.cgi?id=3596"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpujan2022.html"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"4.2.8"}]},{"events":[{"introduced":"4.3.0"},{"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":"15.1"}]},{"events":[{"introduced":"0"},{"last_affected":"15.2"}]},{"events":[{"introduced":"0"},{"fixed":"xcp2410"}]},{"events":[{"introduced":"0"},{"fixed":"xcp2410"}]},{"events":[{"introduced":"0"},{"fixed":"xcp2410"}]},{"events":[{"introduced":"0"},{"fixed":"xcp2410"}]},{"events":[{"introduced":"0"},{"fixed":"xcp2410"}]},{"events":[{"introduced":"0"},{"fixed":"xcp2410"}]},{"events":[{"introduced":"0"},{"fixed":"xcp3110"}]},{"events":[{"introduced":"0"},{"fixed":"xcp3110"}]},{"events":[{"introduced":"0"},{"fixed":"xcp3110"}]},{"events":[{"introduced":"0"},{"fixed":"xcp3110"}]},{"events":[{"introduced":"0"},{"fixed":"xcp3110"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-13817.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H"}]}