Updated Kerberos 5 and pam_krb5 packages available

Updated Kerberos 5 packages are now available for Red Hat Linux 6 and 7.
These packages fix a vulnerability in the handling of Kerberos IV ticket
files. Updated pam_krb5 packages are now available for Red Hat Linux 7.

A race condition exists in libkrb4 which would allow a malicious user to
cause kerberized login services to overwrite the contents of any file on
the system. The destroyed file would contain the kerberos credentials of
an unsuspecting user who had attempted to log in using the kerberized login
service being exploited.

Additional precautions taken in Kerberos 5 1.2.2 will cause pam_krb5 to
fail when it attempts to create Kerberos IV ticket files on behalf of
users. An update for the pam_krb5 package is also available which corrects
this.

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 directly *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-2001-0036
http://web.mit.edu/kerberos/www/advisories/krb4tkt.txt

race