CVE-2001-0080
Cisco Catalyst 6000, 5000, or 4000 switches allow remote attackers to cause a denial of service by connecting to the SSH service with a non-SSH client, which generates a protocol mismatch error.
Date published : 2001-05-07
http://www.securityfocus.com/bid/2117
http://www.cisco.com/warp/public/707/catalyst-ssh-protocolmismatch-pub.shtml