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Gentoo Linux Security Advisory                           GLSA 201412-06
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: libxml2: Denial of Service
     Date: December 10, 2014
     Bugs: #525656
       ID: 201412-06

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Synopsis
========

A vulnerability in libxml2 could result in Denial of Service.

Background
==========

libxml2 is the XML C parser and toolkit developed for the Gnome
project.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  dev-libs/libxml2             < 2.9.2                    >= 2.9.2

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

parser.c in libxml2 before 2.9.2 does not properly prevent entity
expansion even when entity substitution has been disabled.

Impact
======

A context-dependent attacker could entice a user to a specially crafted
XML file using an application linked against libxml2, possibly
resulting in a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libxml2 users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=dev-libs/libxml2-2.9.2"

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

References
==========

[ 1 ] CVE-2014-3660
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-3660

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

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

 http://security.gentoo.org/glsa/glsa-201412-06.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


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