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Gentoo Linux Security Advisory                           GLSA 200903-11
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: PyCrypto: Execution of arbitrary code
      Date: March 09, 2009
      Bugs: #258049
        ID: 200903-11

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Synopsis
========

A buffer overflow in PyCrypto might lead to the execution of arbitrary
code when decrypting using ARC2.

Background
==========

PyCrypto is the Python Cryptography Toolkit.

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

    -------------------------------------------------------------------
     Package              /  Vulnerable  /                  Unaffected
    -------------------------------------------------------------------
  1  dev-python/pycrypto     < 2.0.1-r8                    >= 2.0.1-r8

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

Mike Wiacek of the Google Security Team reported a buffer overflow in
the ARC2 module when processing a large ARC2 key length.

Impact
======

A remote attacker could entice a user or automated system to decrypt an
ARC2 stream in an application using PyCrypto, possibly resulting in the
execution of arbitrary code or a Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All PyCrypto users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-python/pycrypto-2.0.1-r8"

References
==========

  [ 1 ] CVE-2009-0544
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0544

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

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

  http://security.gentoo.org/glsa/glsa-200903-11.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 2009 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