tinyproxy HTTP proxy 1.5.0, 1.4.3, and earlier allows remote attackers to execute arbitrary code via memory that is freed twice (double-free).
https://www.debian.org/security/2002/dsa-145
http://www.securityfocus.com/bid/4731
http://www.iss.net/security_center/static/9079.php
http://sourceforge.net/project/shownotes.php?release_id=88790