Py2Play allows remote attackers to execute arbitrary Python code via pickled objects, which Py2Play unpickles and executes.
https://bugs.gentoo.org/show_bug.cgi?id=103524
http://www.securityfocus.com/bid/14864
http://www.gentoo.org/security/en/glsa/glsa-200509-09.xml
http://www.debian.org/security/2005/dsa-856
http://secunia.com/advisories/17106