CVE-2015-1799

NameCVE-2015-1799
DescriptionThe symmetric-key feature in the receive function in ntp_proto.c in ntpd in NTP 3.x and 4.x before 4.2.8p2 performs state-variable updates upon receiving certain invalid packets, which makes it easier for man-in-the-middle attackers to cause a denial of service (synchronization loss) by spoofing the source IP address of a peer.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-192-1, DSA-3223-1
Debian Bugs782095

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ntp (PTS)jessie, jessie (lts)1:4.2.6.p5+dfsg-7+deb8u3fixed
stretch1:4.2.8p10+dfsg-3+deb9u2fixed
buster1:4.2.8p12+dfsg-4fixed
bullseye1:4.2.8p15+dfsg-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ntpsourcesqueeze1:4.2.6.p2+dfsg-1+deb6u3DLA-192-1
ntpsourcewheezy1:4.2.6.p5+dfsg-2+deb7u4DSA-3223-1
ntpsource(unstable)1:4.2.6.p5+dfsg-6782095

Notes

http://bugs.ntp.org/show_bug.cgi?id=2781
http://support.ntp.org/bin/view/Main/SecurityNotice#Authentication_doesn_t_protect_s

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