full-disclosure - [gentoo-announce] [ GLSA 200801-01 ] unp: Arbitrary command execution

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Date: Wed, 9 Jan 2008 01:47:26 +0100
From: "Robert Buchholz" <rbu@...too.org>
To: <gentoo-announce@...ts.gentoo.org>
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	security-alerts@...uxsecurity.com
Subject: [gentoo-announce] [ GLSA 200801-01 ] unp:
	Arbitrary command execution

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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@...too.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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