bugtraq - [ GLSA 201110-15 ] GnuPG: User-assisted execution of arbitrary code

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Date: Fri, 21 Oct 2011 21:28:14 -0700
From: Tim Sammut <underling@...too.org>
To: gentoo-announce@...too.org
CC: bugtraq@...urityfocus.com, full-disclosure@...ts.grok.org.uk,
  security-alerts@...uxsecurity.com
Subject: [ GLSA 201110-15 ] GnuPG: User-assisted execution of arbitrary code

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Gentoo Linux Security Advisory                           GLSA 201110-15
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: GnuPG: User-assisted execution of arbitrary code
     Date: October 22, 2011
     Bugs: #329583
       ID: 201110-15

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Synopsis
========

The GPGSM utility included in GnuPG contains a use-after-free
vulnerability that may allow an unauthenticated remote attacker to
execute arbitrary code.

Background
==========

The GNU Privacy Guard, GnuPG, is a free replacement for the PGP suite
of cryptographic software. The GPGSM utility in GnuPG is responsible
for processing X.509 certificates, signatures and encryption as well as
S/MIME messages.

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

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  app-crypt/gnupg            < 2.0.16-r1              >= 2.0.16-r1
                                                                < 2.0

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

The GPGSM utility in GnuPG contains a use-after-free vulnerability that
may be exploited when importing a crafted X.509 certificate explicitly
or during the signature verification process.

Impact
======

An unauthenticated remote attacker may execute arbitrary code with the
privileges of the user running GnuPG by enticing them to import a
crafted certificate.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All GnuPG 2.x users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-crypt/gnupg-2.0.16-r1"

References
==========

[ 1 ] CVE-2010-2547
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-2547

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

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

 http://security.gentoo.org/glsa/glsa-201110-15.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@...too.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2011 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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