GLSA 200511-10 RAR: Format string and buffer overflow vulnerabilities
Posted on: 11/13/2005 06:52 PM

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
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-arch/rar lt; 3.5.1 gt;= 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 "gt;=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



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