sendmail security update

Updated Sendmail packages that fix a potentially-exploitable vulnerability
are now available.

Sendmail is a widely used Mail Transport Agent (MTA) and is included in all
Red Hat Enterprise Linux distributions.

There is a bug in the prescan() function of Sendmail versions prior to and
including 8.12.9. The sucessful exploitation of this bug can lead to heap
and stack structure overflows. Although no exploit currently exists, this
issue is locally exploitable and may also be remotely exploitable.
The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2003-0694 to this issue.

All users are advised to update to these erratum packages containing a
backported patch which corrects these vulnerabilities.

Red Hat would like to thank Michal Zalewski for finding and reporting 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.

If up2date fails to connect to Red Hat Network due to SSL Certificate
Errors, you need to install a version of the up2date client with an updated
certificate. The latest version of up2date is available from the Red Hat
FTP site and may also be downloaded directly from the RHN website:

https://rhn.redhat.com/help/latest-up2date.pxt

104565 - CAN-2003-0694 Sendmail possible remote exploit

https://www.redhat.com/security/data/cve/CVE-2003-0694.html