Oracle Linux 3 / 4 / 5 : krb5 (ELSA-2010-0423)

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


Synopsis :

The remote Oracle Linux host is missing one or more security updates.

Description :

From Red Hat Security Advisory 2010:0423 :

Updated krb5 packages that fix one security issue are now available
for Red Hat Enterprise Linux 3, 4, and 5.

The Red Hat Security Response Team has rated this update as having
important security impact. A Common Vulnerability Scoring System
(CVSS) base score, which gives a detailed severity rating, is
available from the CVE link in the References section.

Kerberos is a network authentication system which allows clients and
servers to authenticate to each other using symmetric encryption and a
trusted third party, the Key Distribution Center (KDC).

A NULL pointer dereference flaw was discovered in the MIT Kerberos
Generic Security Service Application Program Interface (GSS-API)
library. A remote, authenticated attacker could use this flaw to crash
any server application using the GSS-API authentication mechanism, by
sending a specially-crafted GSS-API token with a missing checksum
field. (CVE-2010-1321)

Red Hat would like to thank the MIT Kerberos Team for responsibly
reporting this issue. Upstream acknowledges Shawn Emery of Oracle as
the original reporter.

All krb5 users should upgrade to these updated packages, which contain
a backported patch to correct this issue. All running services using
the MIT Kerberos libraries must be restarted for the update to take
effect.

See also :

https://oss.oracle.com/pipermail/el-errata/2010-May/001466.html
https://oss.oracle.com/pipermail/el-errata/2010-May/001471.html
https://oss.oracle.com/pipermail/el-errata/2010-May/001470.html

Solution :

Update the affected krb5 packages.

Risk factor :

Medium / CVSS Base Score : 6.8
(CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C)
CVSS Temporal Score : 5.6
(CVSS2#E:F/RL:OF/RC:C)
Public Exploit Available : true

Family: Oracle Linux Local Security Checks

Nessus Plugin ID: 68041 ()

Bugtraq ID: 40235

CVE ID: CVE-2010-1321