This script is Copyright (C) 2011-2014 Tenable Network Security, Inc.
The remote FreeBSD host is missing a security-related update.
The MIT Kerberos Team reports :
When an encryption key is supplied via the TELNET protocol, its length
is not validated before the key is copied into a fixed-size buffer.
Also see MITKRB5-SA-2011-008.
See also :
Update the affected package.
Risk factor :
Critical / CVSS Base Score : 10.0
CVSS Temporal Score : 8.7
Public Exploit Available : true