Gentoo: 201401-07 libxslt: Denial of Service
Posted by Benjamin D. Thomas   
Gentoo Multiple Denial of Service vulnerabilities have been found in libxslt.
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Gentoo Linux Security Advisory                           GLSA 201401-07
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: libxslt: Denial of Service
     Date: January 10, 2014
     Bugs: #433603, #436284, #463236, #496114
       ID: 201401-07

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Synopsis
========

Multiple Denial of Service vulnerabilities have been found in libxslt.

Background
==========

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

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  dev-libs/libxslt             < 1.1.28                  >= 1.1.28

Description
===========

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).

Impact
======

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.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libxslt users should upgrade to the latest version:

  # 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.

References
==========

[ 1 ] CVE-2012-2870
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-2870
[ 2 ] CVE-2012-2893
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-2893
[ 3 ] CVE-2012-6139
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-6139
[ 4 ] CVE-2013-4520
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-4520

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 http://security.gentoo.org/glsa/glsa-201401-07.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License

Copyright 2014 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5