[ GLSA 200806-10 ] FreeType: User-assisted execution of arbitrary code

[Robert Buchholz <rbu () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200806-10
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: FreeType: User-assisted execution of arbitrary code
      Date: June 23, 2008
      Bugs: #225851
        ID: 200806-10

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Synopsis
========

Font parsing vulnerabilities in FreeType might lead to user-assisted
execution of arbitrary code.

Background
==========

FreeType is a font rendering library for TrueType Font (TTF) and
Printer Font Binary (PFB).

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

    -------------------------------------------------------------------
     Package              /  Vulnerable  /                  Unaffected
    -------------------------------------------------------------------
  1  media-libs/freetype       < 2.3.6                        >= 2.3.6

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

Regenrecht reported multiple vulnerabilities in FreeType via iDefense:

* An integer overflow when parsing values in the Private dictionary
  table in a PFB file, leading to a heap-based buffer overflow
  (CVE-2008-1806).

* An invalid free() call related to parsing an invalid "number of
  axes" field in a PFB file (CVE-2008-1807).

* Multiple off-by-one errors when parsing PBF and TTF files, leading
  to heap-based buffer overflows (CVE-2008-1808).

Impact
======

A remote attacker could entice a user to open a specially crafted TTF
or PBF file, possibly resulting in the execution of arbitrary code with
the privileges of the user running an application linked against
FreeType (such as the X.org X server, running as root).

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All FreeType users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/freetype-2.3.6"

References
==========

  [ 1 ] CVE-2008-1806
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1806
  [ 2 ] CVE-2008-1807
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1807
  [ 3 ] CVE-2008-1808
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1808

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

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

  http://security.gentoo.org/glsa/glsa-200806-10.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 () gentoo 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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