Red Hat alert: Updated mod_python packages fix denial of service vulnerability

Posted by dave on Feb 26, 2004 3:31 AM EDT
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Updated mod_python packages that fix a denial of service vulnerability are now available for Red Hat Linux.


- --------------------------------------------------------------------- Red Hat Security Advisory

Synopsis: Updated mod_python packages fix denial of service vulnerability Advisory ID: RHSA-2004:063-01 Issue date: 2004-02-26 Updated on: 2004-02-26 Product: Red Hat Linux Keywords: mod_python DoS Cross references: Obsoletes: CVE Names: CAN-2003-0973 - ---------------------------------------------------------------------

1. Topic:

Updated mod_python packages that fix a denial of service vulnerability are now available for Red Hat Linux.

2. Relevant releases/architectures:

Red Hat Linux 9 - i386

3. Problem description:

mod_python embeds the Python language interpreter within the Apache httpd server.

A bug has been found in mod_python versions 3.0.3 and earlier that can lead to a denial of service vulnerability. The Common Vulnerabilities and Exposures project ( has assigned the name CAN-2003-0973 to this issue.

Although Red Hat Linux 9 shipped with a version of mod_python that contains this bug, our testing was unable to trigger the denial of service vulnerability. mod_python users are, however, advised to upgrade to these errata packages, which contain a backported patch that corrects this bug.

4. Solution:

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:


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:

5. RPMs required:

Red Hat Linux 9:



6. Verification:

MD5 sum Package Name - --------------------------------------------------------------------------

b7b838c6152fa51ccdc376a788fcd799 9/en/os/SRPMS/mod_python-3.0.1-4.src.rpm bba40347ca46775a0f4545c08776b149 9/en/os/i386/mod_python-3.0.1-4.i386.rpm

These packages are GPG signed by Red Hat for security. Our key is available from

You can verify each package with the following command: rpm --checksig -v

If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: md5sum

7. References:

8. Contact:

The Red Hat security contact is . More contact details at

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