{"id":"CVE-2015-1853","details":"chrony before 1.31.1 does not properly protect state variables in authenticated symmetric NTP associations, which allows remote attackers with knowledge of NTP peering to cause a denial of service (inability to synchronize) via random timestamps in crafted NTP data packets.","modified":"2026-04-16T01:46:47.032645933Z","published":"2019-12-09T19:15:14Z","withdrawn":"2026-01-27T04:13:50.836690Z","references":[{"type":"ADVISORY","url":"http://chrony.tuxfamily.org/News.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201507-01"}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}