[ GLSA 200507-19 ] zlib: Buffer overflow
From: Sune Kloppenborg Jeppesen <jaervosz@gentoo.org.>
To: gentoo-announce@gentoo.org
Subject: [ GLSA 200507-19 ] zlib: Buffer overflow
Date: Fri, 22 Jul 2005 07:32:52 +0200
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Organization: Gentoo Linux Security Team
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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
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 sys-libs/zlib < 1.2.3 >= 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 ">=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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