CVE-2016-3705

NameCVE-2016-3705
DescriptionThe (1) xmlParserEntityCheck and (2) xmlParseAttValueComplex functions in parser.c in libxml2 2.9.3 do not properly keep track of the recursion depth, which allows context-dependent attackers to cause a denial of service (stack consumption and application crash) via a crafted XML document containing a large number of nested entity references.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-503-1, DSA-3593-1
NVD severitymedium (attack range: remote)
Debian Bugs823414

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libxml2 (PTS)wheezy2.8.0+dfsg1-7+wheezy5vulnerable
wheezy (security)2.8.0+dfsg1-7+wheezy9fixed
jessie2.9.1+dfsg1-5+deb8u4fixed
jessie (security)2.9.1+dfsg1-5+deb8u5fixed
stretch (security), stretch2.9.4+dfsg1-2.2+deb9u1fixed
buster, sid2.9.4+dfsg1-5fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
libxml2source(unstable)2.9.3+dfsg1-1.1medium823414
libxml2sourcejessie2.9.1+dfsg1-5+deb8u2mediumDSA-3593-1
libxml2sourcewheezy2.8.0+dfsg1-7+wheezy6mediumDLA-503-1

Notes

https://git.gnome.org/browse/libxml2/commit/?id=8f30bdff69edac9075f4663ce3b56b0c52d48ce6 (v2.9.4)
https://bugzilla.gnome.org/show_bug.cgi?id=765207

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