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TUCoPS :: Linux :: Gentoo :: bx1352.htm

unp: Arbitrary command execution



unp: Arbitrary command execution
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@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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