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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