CVE-2015-7853

NameCVE-2015-7853
DescriptionThe datalen parameter in the refclock driver in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative input value.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severityhigh

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ntp (PTS)jessie (security), jessie1:4.2.6.p5+dfsg-7+deb8u2fixed
stretch1:4.2.8p10+dfsg-3+deb9u2fixed
buster1:4.2.8p12+dfsg-4fixed
bullseye, sid1:4.2.8p13+dfsg-2fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ntpsource(unstable)1:4.2.8p4+dfsg-1
ntpsourcejessie(not affected)
ntpsourcesqueeze(not affected)
ntpsourcewheezy(not affected)

Notes

[jessie] - ntp <not-affected> (Bug introduced in 4.2.8p1-beta3)
[wheezy] - ntp <not-affected> (Bug introduced in 4.2.8p1-beta3)
[squeeze] - ntp <not-affected> (Bug introduced in 4.2.8p1-beta3)
http://support.ntp.org/bin/view/Main/SecurityNotice#October_2015_NTP_Security_Vulner
https://github.com/ntp-project/ntp/commit/8482b536f9494a5d45196ab5b7e13040f5940261

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