CVE-2015-8138

NameCVE-2015-8138
DescriptionNTP before 4.2.8p6 and 4.3.x before 4.3.90 allows remote attackers to bypass the origin timestamp validation via a packet with an origin timestamp set to zero.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-559-1, DSA-3629-1
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ntp (PTS)wheezy1:4.2.6.p5+dfsg-2+deb7u6vulnerable
wheezy (security)1:4.2.6.p5+dfsg-2+deb7u7fixed
jessie (security), jessie1:4.2.6.p5+dfsg-7+deb8u2fixed
stretch1:4.2.8p10+dfsg-3+deb9u1fixed
buster, sid1:4.2.8p10+dfsg-5fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ntpsource(unstable)1:4.2.8p7+dfsg-1medium
ntpsourcejessie1:4.2.6.p5+dfsg-7+deb8u2mediumDSA-3629-1
ntpsourcewheezy1:4.2.6.p5+dfsg-2+deb7u7mediumDLA-559-1

Notes

http://www.talosintel.com/reports/TALOS-2016-0077/
https://github.com/ntp-project/ntp/commit/880191b72409a1965712999d248d70e6f7163af8
The upstream fix for this issue is reported to be incomplete:
http://bugs.ntp.org/show_bug.cgi?id=2945#c7
http://lists.ntp.org/pipermail/hackers/2016-January/007406.html
http://support.ntp.org/bin/view/Main/SecurityNotice#April_2016_NTP_4_2_8p7_Security

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