[ GLSA 200609-04 ] LibXfont: Multiple integer overflows

[Sune Kloppenborg Jeppesen <jaervosz () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200609-04
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: LibXfont: Multiple integer overflows
      Date: September 06, 2006
      Bugs: #144092
        ID: 200609-04

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Synopsis
========

A buffer overflow was discovered in the PCF font parser, potentially
resulting in the execution of arbitrary code.

Background
==========

libXfont is the X.Org Xfont library, some parts are based on the
FreeType code base.

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

    -------------------------------------------------------------------
     Package            /  Vulnerable  /                    Unaffected
    -------------------------------------------------------------------
  1  x11-libs/libXfont     < 1.2.0-r1                      >= 1.2.0-r1

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

Several integer overflows have been found in the PCF font parser.

Impact
======

A local attacker could possibly execute arbitrary code or crash the
Xserver by enticing a user to load a specially crafted PCF font file.

Workaround
==========

Do not use untrusted PCF Font files.

Resolution
==========

All libXfont users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-libs/libXfont-1.2.0-r1"

References
==========

  [ 1 ] CVE-2006-3467
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3467

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

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

  http://security.gentoo.org/glsa/glsa-200609-04.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 2006 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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