Updated mod_ssl packages available

Updated mod_ssl packages for Red Hat Linux 7, 7.1, and
7.2 are available which close a buffer overflow in mod_ssl.

When session caching is enabled, mod_ssl will serialize SSL session
variables to store them for later use. Unpatched versions of mod_ssl prior
to version 2.8.7 which use the 'shm' or 'dbm' session caches would store
session variables using a buffer with a fixed size, making it vulnerable to
overflow.

To exploit the overflow, the server must be configured to require client
certificates, and an attacker must obtain a carefully crafted client
certificate that has been signed by a Certificate Authority which is
trusted by the server. If these conditions are met, it would be possible
for an attacker to execute arbitrary code on the server.

Red Hat Linux 6.2 and earlier releases which did not include the mod_ssl
package are not vulnerable to this bug. Users who utilize client
certificate authentication are strongly advised to upgrade or switch to
shared memory session cache, shmcb, which is not vulnerable to this issue.

The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2002-0082 to this issue.

Before applying this update, make sure to apply all previously released
errata relevant to your system.

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.

After applying these updates, you will need to restart an active server by
performing the following:

/etc/rc.d/init.d/httpd restart

This step must be performed manually to keep SSL-capable servers from
stalling when the server's key is password-protected.

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-0082
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0082
http://marc.theaimsgroup.com/?l=apache-modssl&m=101449247201254
http://online.securityfocus.com/archive/1/258646

buffer, cache, mod_ssl, overflow, session