FTP proxy server for Novell BorderManager 3.6 SP 1a allows remote attackers to cause a denial of service (network connectivity loss) via a connection to port 21 with a large amount of random data.
http://www.securityfocus.com/bid/4696
http://www.iss.net/security_center/static/9031.php
http://online.securityfocus.com/archive/1/271475
http://archives.neohapsis.com/archives/vulnwatch/2002-q2/0060.html