CVE-2016-9042

Published: 31 December 2016

An exploitable denial of service vulnerability exists in the origin timestamp check functionality of ntpd 4.2.8p9. A specially crafted unauthenticated network packet can be used to reset the expected origin timestamp for target peers. Legitimate replies from targeted peers will fail the origin timestamp check (TEST2) causing the reply to be dropped and creating a denial of service condition.

Priority

Medium

CVSS 3 base score: 5.9

Status

Package Release Status
ntp
Launchpad, Ubuntu, Debian
Upstream
Released (1:4.2.8p10+dfsg-1)
Ubuntu 16.04 ESM (Xenial Xerus) Not vulnerable
(1:4.2.8p4+dfsg-3ubuntu5.3)
Ubuntu 14.04 ESM (Trusty Tahr) Not vulnerable
(1:4.2.6.p5+dfsg-3ubuntu2.14.04.10)
Patches:
Upstream: http://bk1.ntp.org/ntp-stable/?PAGE=cset&REV=58b56309OyBGP4pGEYHVzLh4VoQ8pg