[gentoo-announce] [ GLSA 200903-19 ] Xerces-C++: Denial of Service

[news 28]

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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 vali[censored] 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 ( -at -) 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