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Gentoo Linux Security Advisory GLSA 200812-06
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http://security.gentoo.org/
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Severity: Normal
Title: libxml2: Multiple vulnerabilities
Date: December 02, 2008
Bugs: #234099, #237806, #239346, #245960
ID: 200812-06
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Synopsis
========
Multiple vulnerabilities in libxml2 might lead to execution of
arbitrary code or Denial of Service.
Background
==========
libxml2 is the XML (eXtended Markup Language) C parser and toolkit
initially developed for the Gnome project.
Affected packages
=================
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Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-libs/libxml2 < 2.7.2-r1 >= 2.7.2-r1
Description
===========
Multiple vulnerabilities were reported in libxml2:
* Andreas Solberg reported that libxml2 does not properly detect
recursion during entity expansion in an attribute value
(CVE-2008-3281).
* A heap-based buffer overflow has been reported in the
xmlParseAttValueComplex() function in parser.c (CVE-2008-3529).
* Christian Weiske reported that predefined entity definitions in
entities are not properly handled (CVE-2008-4409).
* Drew Yao of Apple Product Security reported an integer overflow in
the xmlBufferResize() function that can lead to an infinite loop
(CVE-2008-4225).
* Drew Yao of Apple Product Security reported an integer overflow in
the xmlSAX2Characters() function leading to a memory corruption
(CVE-2008-4226).
Impact
======
A remote attacker could entice a user or automated system to open a
specially crafted XML document with an application using libxml2,
possibly resulting in the exeution of arbitrary code or a high CPU and
memory consumption.
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/libxml2-2.7.2-r1"
References
==========
[ 1 ] CVE-2008-3281
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3281
[ 2 ] CVE-2008-3529
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3529
[ 3 ] CVE-2008-4409
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4409
[ 4 ] CVE-2008-4225
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4225
[ 5 ] CVE-2008-4226
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4226
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200812-06.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@xxxxxxxxxx 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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