krb5 security update

CentOS Errata and Security Advisory CESA-2007:0892

Kerberos is a network authentication system which allows clients and
servers to authenticate to each other through use of symmetric encryption
and a trusted third party, the KDC. kadmind is the KADM5 administration
server.

The MIT Kerberos Team discovered a problem with the originally published
patch for svc_auth_gss.c (CVE-2007-3999). A remote unauthenticated
attacker who can access kadmind could trigger this flaw and cause kadmind
to crash. On Red Hat Enterprise Linux 5 it is not possible to exploit this
flaw to run arbitrary code as the overflow is blocked by FORTIFY_SOURCE.
(CVE-2007-4743)

This issue did not affect the versions of Kerberos distributed with Red
Hat Enterprise Linux 2.1, 3, or 4.

Users of krb5-server are advised to update to these erratum packages which
contain a corrected backported fix for this issue.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2007-September/076348.html
https://lists.centos.org/pipermail/centos-announce/2007-September/076349.html

Affected packages:
krb5-devel
krb5-libs
krb5-server
krb5-workstation

Upstream details at:
https://access.redhat.com/errata/RHSA-2007:0892