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AUSCERT External Security Bulletin Redistribution
ESB-2008.0029 -- [Linux]
unp: Arbitrary command execution
10 January 2008
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AusCERT Security Bulletin Summary
---------------------------------
Product: unp
Publisher: Gentoo
Operating System: Linux variants
Impact: Execute Arbitrary Code/Commands
Access: Remote/Unauthenticated
CVE Names: CVE-2007-6610
Original Bulletin: http://security.gentoo.org/glsa/glsa-200801-01.xml
Comment: This advisory references vulnerabilities in products which run on
platforms other than Gentoo. It is recommended that administrators
running unp check for an updated version of the software for their
operating system.
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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
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
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
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