A new security update has been released for Gentoo Linux - Perl Compress::Raw modules: Denial of Service. Here the announcement:

Gentoo Linux Security Advisory GLSA 200908-07
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http://security.gentoo.org/
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Severity: Normal
Title: Perl Compress::Raw modules: Denial of Service
Date: August 18, 2009
Bugs: #273141, #281955
ID: 200908-07

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Synopsis
========

An off-by-one error in Compress::Raw::Zlib and Compress::Raw::Bzip2
might lead to a Denial of Service.

Background
==========

Compress::Raw::Zlib and Compress::Raw::Bzip2 are Perl low-level
interfaces to the zlib and bzip2 compression libraries.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 perl-core/Compress-Raw-Zlib < 2.020 >= 2.020
2 perl-core/Compress-Raw-Bzip2 < 2.020 >= 2.020
-------------------------------------------------------------------
2 affected packages on all of their supported architectures.
-------------------------------------------------------------------

Description
===========

Leo Bergolth reported an off-by-one error in the inflate() function in
Zlib.xs of Compress::Raw::Zlib, possibly leading to a heap-based buffer
overflow (CVE-2009-1391).

Paul Marquess discovered a similar vulnerability in the bzinflate()
function in Bzip2.xs of Compress::Raw::Bzip2 (CVE-2009-1884).

Impact
======

A remote attacker might entice a user or automated system (for instance
running SpamAssassin or AMaViS) to process specially crafted files,
possibly resulting in a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Compress::Raw::Zlib users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose
=perl-core/Compress-Raw-Zlib-2.020

All Compress::Raw::Bzip2 users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose
=perl-core/Compress-Raw-Bzip2-2.020

References
==========

[ 1 ] CVE-2009-1391
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1391
[ 2 ] CVE-2009-1884
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1884

Availability
============

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

http://security.gentoo.org/glsa/glsa-200908-07.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
https://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