(Gentoo Issues Fix) Zlib Error Handling Bug in inflate() and inflateBack() Lets Remote Users Deny Service
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SecurityTracker Alert ID: 1011086 |
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SecurityTracker URL: http://securitytracker.com/id/1011086
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CVE Reference:
CAN-2004-0797
(Links to External Site)
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Date: Aug 30 2004
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Impact:
Denial of service via local system, Denial of service via network
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): 1.2 - 1.2.1
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Description:
A vulnerability was reported in zlib. A remote user can cause denial of service conditions.
Johan Thelmen reported that a specially crafted file can cause a segmentation fault in zlib.
It is reported that the inflate() and inflateBack() functions do not properly handle errors.
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Impact:
A user can create a file that when processed by zlib, will cause a segmentation fault. The specific impact depends on the application using zlib.
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Solution:
Gentoo has released a fix and indicates that 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"
Gentoo also indicates that users should also run revdep-rebuild to rebuild any packages that depend on older versions of zlib :
# revdep-rebuild
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Vendor URL: www.gzip.org/zlib/ (Links to External Site)
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Cause:
Exception handling error
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Underlying OS:
Linux (Gentoo)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Fri, 27 Aug 2004 20:48:13 +0200
Subject: [gentoo-announce] [ GLSA 200408-26 ] zlib: Denial of service vulnerability
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
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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
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
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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