[gentoo-announce] [ GLSA 200812-06 ] libxml2: Multiple vulnerabilities

[news 28]

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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

=================

 

-------------------------------------------------------------------

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 ( -at -) 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