EMC Dantz Retrospect 7 backup client 7.0.107, and other versions before 7.0.109, and 6.5 before 6.5.138 allows remote attackers to cause a denial of service (client termination and loss of backup service) via a malformed packet to TCP port 497, which triggers an assert error.
https://exchange.xforce.ibmcloud.com/vulnerabilities/25143
http://www.vupen.com/english/advisories/2006/0811
http://www.securityfocus.com/bid/16933
http://www.idefense.com/application/poi/display?type=vulnerabilities
http://securitytracker.com/id?1015714