A LHa security update is available for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200409-13
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http://security.gentoo.org/
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Severity: Normal
Title: LHa: Multiple vulnerabilities
Date: September 08, 2004
Bugs: #62618
ID: 200409-13

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Synopsis
=======

Several buffer overflows and a shell metacharacter command execution vulnerability have been found in LHa. These vulnerabilities can be used to execute arbitrary code.



Background
=========

LHa is a console-based program for packing and unpacking LHarc archives.

Affected packages
================

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Package / Vulnerable / Unaffected
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1 app-arch/lha = 114i-r4

Description
==========

The command line argument as well as the archive parsing code of LHa lack sufficient bounds checking. Furthermore, a shell meta character command execution vulnerability exists in LHa, since it does no proper filtering on directory names.

Impact
=====

Using a specially crafted command line argument or archive, an attacker can cause a buffer overflow and could possibly run arbitrary code. The shell meta character command execution could lead to the execution of arbitrary commands by an attacker using directories containing shell meta characters in their names.

Workaround
=========

There is no known workaround at this time.

Resolution
=========

All LHa users should upgrade to the latest stable version:

# emerge sync

# emerge -pv ">=app-arch/lha-114i-r4"
# emerge ">=app-arch/lha-114i-r4"

References
=========

[ 1 ] CAN-2004-0694
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0694
[ 2 ] CAN-2004-0745
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0745
[ 3 ] CAN-2004-0769
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0769
[ 4 ] CAN-2004-0771
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0771

Availability
===========

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200409-13.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