{"id":"CVE-2016-1547","details":"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 victim client with a spoofed source address of an existing associated peer. This is true even if authentication is enabled.","modified":"2026-03-15T22:05:14.268699Z","published":"2017-01-06T21:59:00.320Z","related":["SUSE-SU-2016:1278-1","SUSE-SU-2016:1291-1","SUSE-SU-2016:1471-1","SUSE-SU-2016:1568-1","openSUSE-SU-2024:10181-1"],"references":[{"type":"WEB","url":"http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"},{"type":"WEB","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf"},{"type":"WEB","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf"},{"type":"WEB","url":"http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html"},{"type":"WEB","url":"http://www.securityfocus.com/bid/88276"},{"type":"WEB","url":"http://www.securitytracker.com/id/1035705"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201607-15"},{"type":"ADVISORY","url":"http://www.debian.org/security/2016/dsa-3629"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20171004-0002/"},{"type":"ADVISORY","url":"http://rhn.redhat.com/errata/RHSA-2016-1552.html"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2016:1141"},{"type":"ADVISORY","url":"https://security.FreeBSD.org/advisories/FreeBSD-SA-16:16.ntp.asc"},{"type":"ADVISORY","url":"https://www.arista.com/en/support/advisories-notices/security-advisories/1332-security-advisory-19"},{"type":"ADVISORY","url":"http://www.talosintelligence.com/reports/TALOS-2016-0081/"},{"type":"ADVISORY","url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-103-11"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"4.2.8"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-1547.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}