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TUCoPS :: Linux :: Apps A-M :: b06-4597.htm

LibXfont: Multiple integer overflows



LibXfont: Multiple integer overflows
LibXfont: Multiple integer overflows



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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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