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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.

Notes

AuthorNote
mdeslaur
ntp-4.2.8p9 (21 Nov 2016), up to but not including ntp-4.2.8p10
introduced in patch for CVE-2016-7431
Priority

Medium

CVSS 3 base score: 5.9

Status

Package Release Status
ntp
Launchpad, Ubuntu, Debian
precise Not vulnerable
(1:4.2.6.p3+dfsg-1ubuntu3.11)
trusty Not vulnerable
(1:4.2.6.p5+dfsg-3ubuntu2.14.04.10)
upstream
Released (1:4.2.8p10+dfsg-1)
xenial Not vulnerable
(1:4.2.8p4+dfsg-3ubuntu5.3)
yakkety
Released (1:4.2.8p8+dfsg-1ubuntu2.1)
zesty
Released (1:4.2.8p9+dfsg-2ubuntu1.1)
Patches:
upstream: http://bk1.ntp.org/ntp-stable/?PAGE=cset&REV=58b56309OyBGP4pGEYHVzLh4VoQ8pg