A new security update has been released for Gentoo Linux - RAR: Format string and buffer overflow vulnerabilities. Here the announcement:
Gentoo Linux Security Advisory GLSA 200511-10
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http://security.gentoo.org/
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Severity: Normal
Title: RAR: Format string and buffer overflow vulnerabilities
Date: November 13, 2005
Bugs: #111926
ID: 200511-10
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Synopsis
========
RAR contains a format string error and a buffer overflow vulnerability
that may be used to execute arbitrary code.
Background
==========
RAR is a powerful archive manager that can decompress RAR, ZIP and
other files, and can create new archives in RAR and ZIP file format.
Affected packages
=================
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Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-arch/rar < 3.5.1 >= 3.5.1
Description
===========
Tan Chew Keong reported about two vulnerabilities found in RAR:
* A format string error exists when displaying a diagnostic error
message that informs the user of an invalid filename in an UUE/XXE
encoded file.
* Some boundary errors in the processing of malicious ACE archives
can be exploited to cause a buffer overflow.
Impact
======
A remote attacker could exploit these vulnerabilities by enticing a
user to:
* decode a specially crafted UUE/XXE file, or
* extract a malicious ACE archive containing a file with an overly
long filename.
When the user performs these actions, the arbitrary code of the
attacker's choice will be executed.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All RAR users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-arch/rar-3.5.1"
References
==========
[ 1 ] RAR Release Notes
http://www.rarlabs.com/rarnew.htm
[ 2 ] Secunia Research 11/10/2005
http://secunia.com/secunia_research/2005-53/advisory/
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200511-10.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
