Buffer overflow in Double-Take (aka HP StorageWorks Storage Mirroring) 4.5.0.1629, and other 4.5.0.x versions, allows remote attackers to have an unknown impact via a packet with a long string in the username field.
http://www.vupen.com/english/advisories/2008/0666
http://www.securityfocus.com/bid/27951
http://www.securityfocus.com/archive/1/488632/100/0/threaded
http://securityreason.com/securityalert/3698
http://secunia.com/advisories/29075