CVE-2009-4134
Buffer underflow in the rgbimg module in Python 2.5 allows remote attackers to cause a denial of service (application crash) via a large ZSIZE value in a black-and-white (aka B/W) RGB image that triggers an invalid pointer dereference.
Date published : 2010-05-27
http://lists.apple.com/archives/security-announce/2010//Nov/msg00000.html