Amazon Linux AMI : krb5 Remote Crash Vulnerability (ALAS-2011-15)

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


Synopsis :

The remote Amazon Linux AMI host is missing a security update.

Description :

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).

Multiple NULL pointer dereference and assertion failure flaws were
found in the MIT Kerberos KDC when it was configured to use an LDAP
(Lightweight Directory Access Protocol) or Berkeley Database (Berkeley
DB) back end. A remote attacker could use these flaws to crash the
KDC. (CVE-2011-1527, CVE-2011-1528, CVE-2011-1529)

All krb5 users should upgrade to these updated packages, which contain
a backported patch to correct these issues. After installing the
updated packages, the krb5kdc daemon will be restarted automatically.

See also :

http://www.nessus.org/u?0edf44e4

Solution :

Run 'yum upgrade krb5*' to upgrade your system.

Risk factor :

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

Family: Amazon Linux Local Security Checks

Nessus Plugin ID: 69574 ()

Bugtraq ID:

CVE ID: CVE-2011-1527
CVE-2011-1528
CVE-2011-1529