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AUSCERT External Security Bulletin Redistribution
ESB-2004.0540 -- GLSA 200408-26
zlib: Denial of service vulnerability
30 August 2004
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AusCERT Security Bulletin Summary
---------------------------------
Product: zlib
Publisher: Gentoo
Operating System: Linux variants
UNIX variants
Impact: Denial of Service
Access: Existing Account
CVE Names: CAN-2004-0797
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Gentoo Linux Security Advisory GLSA 200408-26
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http://security.gentoo.org/
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Severity: Normal
Title: zlib: Denial of service vulnerability
Date: August 27, 2004
Bugs: #61749
ID: 200408-26
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Synopsis
========
The zlib library contains a Denial of Service vulnerability.
Background
==========
zlib is a general-purpose data-compression library.
Affected packages
=================
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Package / Vulnerable / Unaffected
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1 sys-libs/zlib <= 1.2.1-r2 >= 1.2.1-r3
Description
===========
zlib contains a bug in the handling of errors in the "inflate()" and
"inflateBack()" functions.
Impact
======
An attacker could exploit this vulnerability to launch a Denial of
Service attack on any application using the zlib library.
Workaround
==========
There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version of zlib.
Resolution
==========
All zlib users should upgrade to the latest version:
# emerge sync
# emerge -pv ">=sys-libs/zlib-1.2.1-r3"
# emerge ">=sys-libs/zlib-1.2.1-r3"
You should also run revdep-rebuild to rebuild any packages that depend
on older versions of zlib :
# revdep-rebuild
References
==========
[ 1 ] OpenPKG-SA-2004.038-zlib
http://www.openpkg.org/security/OpenPKG-SA-2004.038-zlib.html
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200408-26.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 2004 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/1.0
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