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Gentoo Linux Security Advisory                           GLSA 201006-15
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: XEmacs: User-assisted execution of arbitrary code
      Date: June 03, 2010
      Bugs: #275397
        ID: 201006-15

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Synopsis
========

Multiple integer overflow errors in XEmacs might allow remote,
user-assisted attackers to execute arbitrary code.

Background
==========

XEmacs is a highly extensible and customizable text editor.

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

    -------------------------------------------------------------------
     Package             /   Vulnerable   /                 Unaffected
    -------------------------------------------------------------------
  1  app-editors/xemacs     < 21.4.22-r1                 >= 21.4.22-r1

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

Tielei Wang reported multiple integer overflow vulnerabilities in the
tiff_instantiate(), png_instantiate() and jpeg_instantiate() functions
in glyphs-eimage.c, all possibly leading to heap-based buffer
overflows.

Impact
======

A remote attacker could entice a user to open a specially crafted TIFF,
JPEG or PNG file using XEmacs, possibly resulting in the remote
execution of arbitrary code with the privileges of the user running the
application, or a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All XEmacs users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose
 ">=app-editors/xemacs-21.4.22-r1"

NOTE: This is a legacy GLSA. Updates for all affected architectures are
available since July 26, 2009. It is likely that your system is already
no longer affected by this issue.

References
==========

  [ 1 ] CVE-2009-2688
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2688

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

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

  http://security.gentoo.org/glsa/glsa-201006-15.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
https://bugs.gentoo.org.

License
=======

Copyright 2010 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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