CVE-2016-1836

NameCVE-2016-1836
DescriptionUse-after-free vulnerability in the xmlDictComputeFastKey function in libxml2 before 2.9.4, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1, allows remote attackers to cause a denial of service via a crafted XML document.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDSA-3593-1
NVD severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
libxml2 (PTS)wheezy2.8.0+dfsg1-7+wheezy5fixed
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+dfsg1-1.1medium
libxml2sourcejessie2.9.1+dfsg1-5+deb8u2mediumDSA-3593-1
libxml2sourcewheezy(not affected)

Notes

[wheezy] - libxml2 <not-affected> (Vulnerable code not present)
Fixed by: https://git.gnome.org/browse/libxml2/commit/?id=45752d2c334b50016666d8f0ec3691e2d680f0a0 (v2.9.4)
Introduced by: https://git.gnome.org/browse/libxml2/commit/?id=dcc19503193c71596278a252064a8ce66331b3cd (v2.9.2)
https://bugzilla.gnome.org/show_bug.cgi?id=759398
Regression applies to Jessie, since fix backported as 0007-Fix-a-parsing-bug-on-non-ascii-element-and-CR-LF-usa.patch

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