New vixie-cron packages available

New vixie-cron packages are available that fix a buffer overflow
in the 'crontab' command; this could allow certain users to
gain elevated privileges.

It is recommended that all users update to the fixed packages.

Users of Red Hat Linux 6.0 or 6.1 should use the packages for
Red Hat Linux 6.2.

A buffer overflow existed in the 'crontab' command; if called
by a user with a username longer than 20 characters. If the
system administrator has created usernames of that length, it
would be possible for those users to gain elevated privileges.

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.

https://www.redhat.com/security/data/cve/CVE-2001-0560.html

crontab