Security Advisory Updated secureweb packages available

Advisory: RHSA-2002:042-13
Type: Security Advisory
Severity: N/A
Issued on: 2002-03-04
Last updated on: 2002-03-18
Affected Products:
CVEs ( CVE-2002-0082


Updated secureweb packages are now available for Red Hat Secure Web Server
3.2 (U.S.). These updates 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 using the 'shm' or 'dbm' session caches would do so 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 is possible for
an attacker to execute arbitrary code on the server.

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

Pay special attention to the installation instructions in the "Solution"
section below as they differ from standarad upgrade instructions.


Some of these files are distributed in rhmask format and may only be used
by individuals who have purchased Red Hat Linux 6.2 Professional.

To produce installable RPM files from the rhmask files, retrieve the rhmask
files via ftp and type the following command:

rhmask secureweb-3.2-12.i386.rpm secureweb-3.2.5-1.i386.rpm.rhmask

The original RPM is located only on your Secure Web Server CD, and cannot
be obtained via the Internet. Note: if you do not have the original RPM
located in the same directory as the rhmask file, you will need to prefix
the name of the RPM with the full path name to its location (for example on
your installation CD).

For each RPM for your particular architecture, run:

rpm -Fvh [filename]

where [filename] is the name of the RPM package.

To restart your Secure Web Server, type the following command in a shell
prompt as root:

/etc/rc.d/init.d/httpsd restart

Updated packages



buffer, cache, mod_ssl, overflow, session

These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:

The Red Hat security contact is More contact details at