GLSA 200507-19: zlib: Buffer overflow
Posted on: 07/22/2005 06:44 AM

A zlib security update has been released for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200507-19
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http://security.gentoo.org/
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Severity: High
Title: zlib: Buffer overflow
Date: July 22, 2005
Bugs: #99751
ID: 200507-19

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Synopsis
=======

zlib is vulnerable to a buffer overflow which could potentially lead to execution of arbitrary code.

Background
=========

zlib is a widely used free and patent unencumbered data compression library.

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

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Package / Vulnerable / Unaffected
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1 sys-libs/zlib lt; 1.2.3 gt;= 1.2.3

Description
==========

zlib improperly handles invalid data streams which could lead to a buffer overflow.

Impact
=====

By creating a specially crafted compressed data stream, attackers can overwrite data structures for applications that use zlib, resulting in arbitrary code execution or a Denial of Service.

Workaround
=========

There is no known workaround at this time.

Resolution
=========

All zlib users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=sys-libs/zlib-1.2.3"

References
=========

[ 1 ] Full Disclosure Announcement
http://archives.neohapsis.com/archives/fulldisclosure/2005-07/0489.html
[ 2 ] CAN-2005-1849
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1849

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

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

http://security.gentoo.org/glsa/glsa-200507-19.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 2005 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/2.0


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