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libxslt: Denial of Service


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 201401-07 / libxslt
Release Date January 10, 2014
Latest Revision January 10, 2014: 1
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
dev-libs/libxslt < 1.1.28 >= 1.1.28 All supported architectures

Related bugreports: #433603, #436284, #463236, #496114


Multiple Denial of Service vulnerabilities have been found in libxslt.

2.  Impact Information


libxslt is the XSLT C library developed for the GNOME project. XSLT is an XML language to define transformations for XML.


Multiple vulnerabilities have been found in libxslt:

  • Multiple errors exist in pattern.c and functions.c (CVE-2012-2870, CVE-2012-6139).
  • A double-free error exists in templates.c (CVE-2012-2893).
  • A NULL pointer dereference in keys.c (CVE-2012-6139).
  • An error in handling stylesheets containing DTDs (CVE-2013-4520).


A remote attacker could entice a user to process a specially crafted file in an application linked against libxslt, possibly resulting in a Denial of Service condition.

3.  Resolution Information


There is no known workaround at this time.


All libxslt users should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=dev-libs/libxslt-1.1.28"

Packages which depend on this library may need to be recompiled. Tools such as revdep-rebuild may assist in identifying some of these packages.

4.  References


Page updated January 10, 2014

Summary: This is a Gentoo Linux Security Advisory

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