Updated kerberos packages available

A remotely exploitable stack buffer overflow has been found in the Kerberos
v4 compatibility administration daemon distributed with the Red Hat Linux
krb5 packages.

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 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 6.2, 7, 7.1,
7.2, 7.3, and 8.0, but by default is not enabled or used.

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

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-1235
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2002-002-kadm4.txt

kadmind4, krb5