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Gentoo Linux Security Advisory                           GLSA 200509-09
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                                            https://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:

  https://security.gentoo.org/glsa/200509-09

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 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.

https://creativecommons.org/licenses/by-sa/2.0/