Stack-based buffer overflow in Remote Control Server in Free Download Manager (FDM) 2.5 Build 758 and 3.0 Build 844 allows remote attackers to execute arbitrary code via a long Authorization header in an HTTP request.
https://www.exploit-db.com/exploits/7986
http://www.vupen.com/english/advisories/2009/0302
http://www.securityfocus.com/bid/33554
http://www.securityfocus.com/archive/1/500604/100/0/threaded
http://secunia.com/secunia_research/2009-3/