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
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1 app-arch/unp < 1.0.14 >= 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 ">=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
