GLSA 200801-01 unp: Arbitrary command execution
Posted on: 01/09/2008 02:55 AM

A new security update has been released for Gentoo Linux - unp: Arbitrary command execution. Here the announcement:

Gentoo Linux Security Advisory GLSA 200801-01
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http://security.gentoo.org/
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Severity: Normal
Title: unp: Arbitrary command execution
Date: January 09, 2008
Bugs: #203106
ID: 200801-01

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Synopsis
========

unp allows execution of arbitrary code via malicious file names.

Background
==========

unp is a script for unpacking various file formats.

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

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Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-arch/unp lt; 1.0.14 gt;= 1.0.14

Description
===========

Erich Schubert from Debian discovered that unp does not escape file
names properly before passing them to calls of the shell.

Impact
======

A remote attacker could entice a user or automated system to unpack a
compressed archive with a specially crafted file name, leading to the
execution of shell commands from within the filename. That code will be
executed with the privileges of the user running unp.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All unp users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=app-arch/unp-1.0.14"

References
==========

[ 1 ] CVE-2007-6610
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6610

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

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

http://security.gentoo.org/glsa/glsa-200801-01.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 2008 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/2.5



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