[Full-disclosure] [ GLSA 200903-11 ] PyCrypto: Execution of arbitrary code

[Robert Buchholz]

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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 at 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
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