Blue Coat Systems WinProxy 6.1a and 6.0 r1c, and possibly earlier, allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via a long HTTP CONNECT request, which triggers heap corruption.
https://exchange.xforce.ibmcloud.com/vulnerabilities/32204
http://www.vupen.com/english/advisories/2007/0482
http://www.securityfocus.com/bid/22393
http://securitytracker.com/id?1017586
http://secunia.com/advisories/24049
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=471