Cisco IOS XR 5.1.1.K9SEC allows remote authenticated users to cause a denial of service (vty error, and SSH and TELNET outage) via a crafted disconnect action within an SSH session, aka Bug ID CSCul63127.Referenceshttp://www.securityfocus.com/bid/75295http://tools.cisco.com/security/center/viewAlert.x?alertId=39402http://www.securitytracker.com/id/1032661
