From: Robert Buchholz <rbu@gentoo.org.>
To: gentoo-announce@gentoo.org
Subject: [ GLSA 200903-19 ] Xerces-C++: Denial of Service
Date: Mon, 9 Mar 2009 15:01:23 +0100
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Gentoo Linux Security Advisory GLSA 200903-19
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http://security.gentoo.org/
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Severity: Normal
Title: Xerces-C++: Denial of Service
Date: March 09, 2009
Bugs: #240496
ID: 200903-19
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Synopsis
========
An error in Xerces-C++ allows for a Denial of Service via malicious XML
schema files.
Background
==========
Xerces-C++ is a validating XML parser written in a portable subset of
C++.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-libs/xerces-c < 3.0.0-r1 >= 3.0.0-r1
Description
===========
Frank Rast reported that the XML parser in Xerces-C++ does not
correctly handle an XML schema definition with a large maxOccurs value,
which triggers excessive memory consumption during the validation of an
XML file.
Impact
======
A remote attacker could entice a user or automated system to validate
an XML file using a specially crafted XML schema file, leading to a
Denial of Service (stack consumption and crash).
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Xerces-C++ users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/xerces-c-3.0.0-r1"
References
==========
[ 1 ] CVE-2008-4482
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4482
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200903-19.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 2009 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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