Format string bug fixed in exim

A locally-exploitable format string bug, located in the code that handles
batch SMTP, has been fixed in exim.

A format string vulnerability has been found in the batch SMTP
processing code, which is triggered by any SMTP response that includes
a part of its SMTP command. This vulnerability is only triggered when
the 'headers_check_syntax' option is set (by default it is not set).
The bug was found by Megyer Laszlo.

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-2001-0690

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