full-disclosure - [ GLSA 200710-16 ] X.Org X server: Composite local privilege escalation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date: Mon, 15 Oct 2007 00:38:27 +0200
From: Pierre-Yves Rofes <py@...too.org>
To: gentoo-announce@...too.org
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	security-alerts@...uxsecurity.com
Subject: [ GLSA 200710-16 ] X.Org X server: Composite
	local privilege escalation

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200710-16
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                            http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

  Severity: High
     Title: X.Org X server: Composite local privilege escalation
      Date: October 14, 2007
      Bugs: #191964
        ID: 200710-16

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

A vulnerability has been discovered in the Composite extension of the
X.Org X server, allowing for a local privilege escalation.

Background
==========

The X Window System is a graphical windowing system based on a
client/server model.

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

    -------------------------------------------------------------------
     Package               /   Vulnerable   /               Unaffected
    -------------------------------------------------------------------
  1  x11-base/xorg-server     < 1.3.0.0-r1               >= 1.3.0.0-r1

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

Aaron Plattner discovered a buffer overflow in the compNewPixmap()
function when copying data from a large pixel depth pixmap into a
smaller pixel depth pixmap.

Impact
======

A local attacker could execute arbitrary code with the privileges of
the user running the X server, typically root.

Workaround
==========

Disable the Composite extension by setting ' Option "Composite"
"disable" ' in the Extensions section of xorg.conf.

Note: This could affect the functionality of some applications.

Resolution
==========

All X.Org X server users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=x11-base/xorg-server-1.3.0.0-r1"

References
==========

  [ 1 ] CVE-2007-4730
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4730

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

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

  http://security.gentoo.org/glsa/glsa-200710-16.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@...too.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2007 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
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.7 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFHEppiuhJ+ozIKI5gRAmOeAJ46xK+4nH8LWGxbNmnlmPrltBqsHgCfUTNK
8qUzM6SvnXk2c2yZgp50GTk=
=DiOR
-----END PGP SIGNATURE-----

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/