{"id":"DEBIAN-CVE-2016-2517","details":"NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows remote attackers to cause a denial of service (prevent subsequent authentication) by leveraging knowledge of the controlkey or requestkey and sending a crafted packet to ntpd, which changes the value of trustedkey, controlkey, or requestkey.  NOTE: this vulnerability exists because of a CVE-2016-2516 regression.","modified":"2026-07-28T06:04:37.301973224Z","published":"2017-01-30T21:59:01.033Z","upstream":["CVE-2016-2517"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2016-2517"}],"affected":[{"package":{"name":"ntp","ecosystem":"Debian:11","purl":"pkg:deb/debian/ntp?arch=source&distro=bullseye"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:4.2.8p7+dfsg-1"}]}],"ecosystem_specific":{"urgency":"unimportant"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2016-2517.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}