The Job Engine (bengine.exe) service in Symantec Backup Exec for Windows Servers (BEWS) 11d build 11.0.7170 and 11.0.6.6235 allows remote attackers to cause a denial of service (NULL dereference and service crash) via a crafted packet to port 5633/tcp.
https://exchange.xforce.ibmcloud.com/vulnerabilities/38676
http://www.vupen.com/english/advisories/2007/4019
http://www.securityfocus.com/bid/26028
http://www.securityfocus.com/archive/1/484333/100/0/threaded
http://www.securityfocus.com/archive/1/484318/100/0/threaded
http://securitytracker.com/id?1019001
http://securityresponse.symantec.com/avcenter/security/Content/2007.11.27.html