CVE-2016-7427

NameCVE-2016-7427
DescriptionThe broadcast mode replay prevention functionality in ntpd in NTP before 4.2.8p9 allows remote attackers to cause a denial of service (reject broadcast mode packets) via a crafted broadcast mode packet.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

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
ntpsourcewheezy(not affected)
ntpsourcejessie(not affected)
ntpsource(unstable)1:4.2.8p9+dfsg-1

Notes

[jessie] - ntp <not-affected> (Vulnerable code not present)
[wheezy] - ntp <not-affected> (Vulnerable code not present)
http://support.ntp.org/bin/view/Main/NtpBug3114
http://www.talosintelligence.com/reports/TALOS-2016-0131/
The fixes for CVE-2015-7973 have added several new integrity checks on incoming
broadcast mode packets and issue got introduced with code changes to fix that
issue.

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