Kerberos 4 Realm Principle Impersonation

This script is Copyright (C) 2003-2013 Tenable Network Security, Inc.


Synopsis :

The remote host is using an authentication protocol with cryptographic
weaknesses.

Description :

The remote host is running Kerberos IV.

It has been demonstrated that the Kerberos IV protocol has inherent
design flaws that make it insecure to use.

See also :

http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2003-004-krb4.txt

Solution :

Use Kerberos 5 instead. If you run Kerberos 5 with Kerberos IV
backward compatibility, make sure you upgrade to version 1.3.

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 5.5
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Misc.

Nessus Plugin ID: 11511 (kerberos4_crypto_weaknesses.nasl)

Bugtraq ID: 7113

CVE ID: CVE-2003-0138