(RHSA-2002:250) krb5 security update

Kerberos is a network authentication system.

A stack buffer overflow has been found in the implementation of the
Kerberos v4 compatibility administration daemon (kadmind4), which is part
of the MIT krb5 distribution. This vulnerability is present in version
1.2.6 and earlier of the MIT krb5 distribution and can be exploited to gain
unauthorized root access to a KDC host. The attacker does not need to
authenticate to the daemon to successfully perform this attack.

kadmind4 is included in the Kerberos packages in Red Hat Linux Advanced
Server but is not enabled or used by default.

All users of Kerberos are advised to upgrade to these errata packages which
contain a backported patch and are not vulnerable to this issue.