full-disclosure - [ GLSA 200408-10 ] gv: Exploitable Buffer Overflow

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Message-ID: <200408121333.30341.jaervosz@gentoo.org>
From: jaervosz at gentoo.org (Sune Kloppenborg Jeppesen)
Subject: [ GLSA 200408-10 ] gv: Exploitable Buffer Overflow

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Gentoo Linux Security Advisory                           GLSA 200408-10
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: gv: Exploitable Buffer Overflow
      Date: August 12, 2004
      Bugs: #59385
        ID: 200408-10

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Synopsis
========

gv contains an exploitable buffer overflow that allows an attacker to
execute arbitrary code.

Background
==========

gv is a PostScript and PDF viewer for X which provides a user interface
for the ghostscript interpreter.

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

    -------------------------------------------------------------------
     Package      /   Vulnerable   /                        Unaffected
    -------------------------------------------------------------------
  1  app-text/gv      <= 3.5.8-r3                          >= 3.5.8-r4

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

gv contains a buffer overflow vulnerability where an unsafe sscanf()
call is used to interpret PDF and PostScript files.

Impact
======

By enticing a user to view a malformed PDF or PostScript file an
attacker could execute arbitrary code with the permissions of the user
running gv.

Workaround
==========

There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version of gv.

Resolution
==========

All gv users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=app-text/gv-3.5.8-r4"
    # emerge ">=app-text/gv-3.5.8-r4"

References
==========

  [ 1 ] CAN-2002-0838
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0838

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

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

    http://security.gentoo.org/glsa/glsa-200408-10.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 2004 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/1.0
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