[ GLSA 200508-04 ] Netpbm: Arbitrary code execution in pstopnm

[Thierry Carrez <koon () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200508-04
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Netpbm: Arbitrary code execution in pstopnm
      Date: August 05, 2005
      Bugs: #100398
        ID: 200508-04

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Synopsis
========

The pstopnm utility, part of the Netpbm tools, contains a vulnerability
which can potentially result in the execution of arbitrary code.

Background
==========

Netpbm is a package of 220 graphics programs and a programming
libraries, including pstopnm. pstopnm is a tool which converts
PostScript files to PNM image files.

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

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  media-libs/netpbm       < 10.28                          >= 10.28

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

Max Vozeler reported that pstopnm calls the GhostScript interpreter on
untrusted PostScript files without specifying the -dSAFER option, to
convert a PostScript file into a PBM, PGM, or PNM file.

Impact
======

An attacker could craft a malicious PostScript file and entice a user
to run pstopnm on it, resulting in the execution of arbitrary commands
with the permissions of the user running pstopnm.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Netpbm users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/netpbm-10.28"

References
==========

  [ 1 ] Secunia Advisory SA16184
        http://secunia.com/advisories/16184/

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

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

  http://security.gentoo.org/glsa/glsa-200508-04.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 2005 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/2.0

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