FreeBSD : krb5 -- MITKRB5-SA-2011-001, kpropd denial of service (64f24a1e-66cf-11e0-9deb-f345f3aa24f0)

This script is Copyright (C) 2011-2013 Tenable Network Security, Inc.


Synopsis :

The remote FreeBSD host is missing one or more security-related
updates.

Description :

An advisory published by the MIT Kerberos team says :

The MIT krb5 KDC database propagation daemon (kpropd) is vulnerable to
a denial-of-service attack triggered by invalid network input. If a
kpropd worker process receives invalid input that causes it to exit
with an abnormal status, it can cause the termination of the listening
process that spawned it, preventing the slave KDC it was running on
from receiving database updates from the master KDC.

Exploit code is not known to exist, but the vulnerabilities are easy
to trigger manually.

An unauthenticated remote attacker can cause kpropd running in
standalone mode (the '-S' option) to terminate its listening process,
preventing database propagations to the KDC host on which it was
running. Configurations where kpropd runs in incremental propagation
mode ('iprop') or as an inetd server are not affected.

See also :

http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-001.txt
http://www.nessus.org/u?1d497795

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P)

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 53441 ()

Bugtraq ID:

CVE ID: CVE-2010-4022

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