Gentoo: 201304-01 NVIDIA Drivers: Privilege escalation
Posted by Benjamin D. Thomas   
Gentoo Two vulnerabilities in NVIDIA drivers may allow a local attacker to gain escalated privileges.
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Gentoo Linux Security Advisory                           GLSA 201304-01
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                                            http://security.gentoo.org/
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 Severity: High
    Title: NVIDIA Drivers: Privilege escalation
     Date: April 08, 2013
     Bugs: #429614, #464248
       ID: 201304-01

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Synopsis
========

Two vulnerabilities in NVIDIA drivers may allow a local attacker to
gain escalated privileges.

Background
==========

The NVIDIA drivers provide X11 and GLX support for NVIDIA graphic
boards.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  x11-drivers/nvidia-drivers
                                  < 304.88                  >= 304.88

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

Two vulnerabilities have been discovered in NVIDIA drivers:

* A vulnerability has been found in the way NVIDIA drivers handle
  read/write access to GPU device nodes, allowing access to arbitrary
  system memory locations (CVE-2012-4225).
* A buffer overflow error has been discovered in NVIDIA drivers
  (CVE-2013-0131).

NOTE: Exposure to CVE-2012-4225 is reduced in Gentoo due to 660
permissions being used on the GPU device nodes by default.

Impact
======

A local attacker could gain escalated privileges.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All NVIDIA driver users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot -v ">=x11-drivers/nvidia-drivers-304.88"

References
==========

[ 1 ] CVE-2012-4225
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-4225
[ 2 ] CVE-2013-0131
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-0131

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

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

 http://security.gentoo.org/glsa/glsa-201304-01.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 2013 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