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[ GLSA 200509-09 ] Py2Play: Remote execution of arbitrary Python code
From: Thierry Carrez <koon () gentoo org>
Date: Sat, 17 Sep 2005 14:04:32 +0200

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Gentoo Linux Security Advisory                           GLSA 200509-09
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                                            http://security.gentoo.org/
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  Severity: High
     Title: Py2Play: Remote execution of arbitrary Python code
      Date: September 17, 2005
      Bugs: #103524
        ID: 200509-09

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Synopsis
========

A design error in Py2Play allows attackers to execute arbitrary code.

Background
==========

Py2Play is a peer-to-peer network game engine written in Python.
Pickling is a Python feature allowing to serialize Python objects into
string representations (called pickles) that can be sent over the
network.

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

    -------------------------------------------------------------------
     Package             /  Vulnerable  /                   Unaffected
    -------------------------------------------------------------------
  1  dev-python/py2play      <= 0.1.7                      Vulnerable!
    -------------------------------------------------------------------
     NOTE: Certain packages are still vulnerable. Users should migrate
           to another package if one is available or wait for the
           existing packages to be marked stable by their
           architecture maintainers.

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

Arc Riley discovered that Py2Play uses Python pickles to send objects
over a peer-to-peer game network, and that clients accept without
restriction the objects and code sent by peers.

Impact
======

A remote attacker participating in a Py2Play-powered game can send
malicious Python pickles, resulting in the execution of arbitrary
Python code on the targeted game client.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

The Py2Play package has been hard-masked prior to complete removal from
Portage, and current users are advised to unmerge the package:

    # emerge --unmerge  dev-python/py2play

References
==========

  [ 1 ] CAN-2005-2875
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2875

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

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

  http://security.gentoo.org/glsa/glsa-200509-09.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 2005 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/2.0

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