full-disclosure - [ GLSA 200803-14 ] Ghostscript: Buffer overflow

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Date: Sat, 08 Mar 2008 19:57:37 +0100
From: Pierre-Yves Rofes <py@...too.org>
To: gentoo-announce@...too.org
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	security-alerts@...uxsecurity.com
Subject: [ GLSA 200803-14 ] Ghostscript: Buffer overflow

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Gentoo Linux Security Advisory                           GLSA 200803-14
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Ghostscript: Buffer overflow
      Date: March 08, 2008
      Bugs: #208999
        ID: 200803-14

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Synopsis
========

A stack-based buffer overflow has been discovered in Ghostscript,
allowing arbitrary code execution.

Background
==========

Ghostscript is a suite of software based on an interpreter for
PostScript and PDF.

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

    -------------------------------------------------------------------
     Package                   /   Vulnerable   /           Unaffected
    -------------------------------------------------------------------
  1  app-text/ghostscript-esp      < 8.15.4-r1            >= 8.15.4-r1
  2  app-text/ghostscript-gpl       < 8.61-r3               >= 8.61-r3
  3  app-text/ghostscript-gnu      < 8.60.0-r2            >= 8.60.0-r2
    -------------------------------------------------------------------
     3 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

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

Chris Evans (Google Security) discovered a stack-based buffer overflow
within the zseticcspace() function in the file zicc.c when processing a
PostScript file containing a long "Range" array in a .seticcscpate
operator.

Impact
======

A remote attacker could exploit this vulnerability by enticing a user
to open a specially crafted PostScript file, which could possibly lead
to the execution of arbitrary code or a Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Ghostscript ESP users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose
">=app-text/ghostscript-esp-8.15.4-r1"

All Ghostscript GPL users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-text/ghostscript-gpl-8.61-r3"

All Ghostscript GNU users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose
">=app-text/ghostscript-gnu-8.60.0-r2"

References
==========

  [ 1 ] CVE-2008-0411
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0411

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

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

  http://security.gentoo.org/glsa/glsa-200803-14.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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