CVE-2015-7974

Name	CVE-2015-7974
Description	NTP 4.x before 4.2.8p6 and 4.3.x before 4.3.90 do not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a "skeleton key."
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-559-1, DSA-3629-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
ntp (PTS)	jessie, jessie (lts)	1:4.2.6.p5+dfsg-7+deb8u3	fixed
	stretch	1:4.2.8p10+dfsg-3+deb9u2	fixed
	buster	1:4.2.8p12+dfsg-4	fixed
	bullseye	1:4.2.8p15+dfsg-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin
ntp	source	wheezy	1:4.2.6.p5+dfsg-2+deb7u7		DLA-559-1
ntp	source	jessie	1:4.2.6.p5+dfsg-7+deb8u2		DSA-3629-1
ntp	source	(unstable)	1:4.2.8p7+dfsg-1	low

http://support.ntp.org/bin/view/Main/SecurityNotice#January_2016_NTP_4_2_8p6_Securit
http://support.ntp.org/bin/view/Main/NtpBug2936