{"action":"Upgrade ntp to 1:4.2.8p7+dfsg-1 or later.","affected":[{"fixed":"1:4.2.8p7+dfsg-1","introduced":"0"}],"component":"ntp","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:11","exploited":false,"fixed_versions":["1:4.2.8p7+dfsg-1"],"id":"tcs_01M5NBFJE7C9WWTWHRKQK5EEJZ","modified_at":"2026-08-04T06:04:05.366188597Z","published_at":"2017-01-06T21:59:00.320Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2016-1547","https://security-tracker.debian.org/tracker/CVE-2016-1547"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2016-1547","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2016-1547"}],"summary":"An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlier and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92 by sending a crypto NAK packet to a vic"}