Kerberos Server Spoofed Packet Amplification DoS (PingPong)

This script is Copyright (C) 2001-2013 Tenable Network Security, Inc.


Synopsis :

The remote service is vulnerable to a denial of service attack.

Description :

The remote host is running a Kerberos server that seems to be
vulnerable to a 'ping-pong' attack.

When contacted on the UDP port, this service always responds, even to
malformed requests. This makes it possible to involve it in a
'ping-pong' attack, in which an attacker spoofs a packet between two
machines running this service, causing them to spew characters at each
other, slowing the machines down and saturating the network.

See also :

http://seclists.org/oss-sec/2013/q2/316
htp://krbdev.mit.edu/rt/Ticket/Display.html?id=7637

Solution :

Upgrade to krb5-1.11.3 or later. Additionally, you can disable this service if it is not required.

Risk factor :

High / CVSS Base Score : 7.8
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C)

Family: Misc.

Nessus Plugin ID: 10640 (krb_pingpong.nasl)

Bugtraq ID:

CVE ID: CVE-2002-2443