The manager server in Symantec Enterprise Security Manager (ESM) 6 and 6.5.x allows remote attackers to cause a denial of service (hang) via a malformed ESM agent request.
http://www.vupen.com/english/advisories/2006/3353
http://www.symantec.com/avcenter/security/Content/2006.08.21a.html
http://www.securityfocus.com/bid/19580
http://www.securityfocus.com/archive/1/444068/100/0/threaded
http://securitytracker.com/id?1016728