The Discovery Service (casdscvc) in CA ARCserve Backup 12.0.5454.0 and earlier allows remote attackers to cause a denial of service (crash) via a packet with a large integer value used in an increment to TCP port 41523, which triggers a buffer over-read.
https://exchange.xforce.ibmcloud.com/vulnerabilities/41869
http://www.vupen.com/english/advisories/2008/1354
http://www.securitytracker.com/id?1020324
http://www.securityfocus.com/bid/28927
http://www.securityfocus.com/archive/1/493430/100/0/threaded