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TUCoPS :: Linux :: Apps A-M :: bx1686.htm

libxml2: Denial of Service



libxml2: Denial of Service
libxml2: Denial of Service



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Gentoo Linux Security Advisory                           GLSA 200801-20
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http://security.gentoo.org/ 
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  Severity: Normal
     Title: libxml2: Denial of Service
      Date: January 30, 2008
      Bugs: #202628
        ID: 200801-20

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Synopsis
=======
A Denial of Service vulnerability has been reported in libxml2.

Background
=========
libxml2 is the XML (eXtended Markup Language) C parser and toolkit
initially developed for the Gnome project.

Affected packages
================
    -------------------------------------------------------------------
     Package           /   Vulnerable   /                   Unaffected
    -------------------------------------------------------------------
  1  dev-libs/libxml2      < 2.6.30-r1                    >= 2.6.30-r1

Description
==========
Brad Fitzpatrick reported that the xmlCurrentChar() function does not
properly handle some UTF-8 multibyte encodings.

Impact
=====
A remote attacker could entice a user to open a specially crafted XML
document with an application using libxml2, possibly resulting in a
high CPU consumption. Note that this vulnerability could also be
triggered without user interaction by an automated system processing
XML content.

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/libxml2-2.6.30-r1"

References
=========
  [ 1 ] CVE-2007-6284
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6284 

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

http://security.gentoo.org/glsa/glsa-200801-20.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 
http://bugs.gentoo.org. 

License
======
Copyright 2008 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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