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Red Hat Linux Advisories: mod_python, libxml2

Feb 26, 2004, 21:55 (0 Talkback[s])

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 (cve.mitre.org/) 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:

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

5. RPMs required:

Red Hat Linux 9:

SRPMS:
ftp://updates.redhat.com/9/en/os/SRPMS/mod_python-3.0.1-4.src.rpm

i386:
ftp://updates.redhat.com/9/en/os/i386/mod_python-3.0.1-4.i386.rpm

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 https://www.redhat.com/security/keys.html

You can verify each package with the following command:

rpm --checksig -v <filename>

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 <filename>

7. References:

http://www.modpython.org/pipermail/mod_python/2003-November/014532.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0973

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact details at https://www.redhat.com/solutions/security/news/contact.html

Copyright 2003 Red Hat, Inc.


Red Hat Security Advisory

Synopsis: Updated libxml2 packages fix security vulnerability
Advisory ID: RHSA-2004:091-01
Issue date: 2004-02-26
Updated on: 2004-02-26
Product: Red Hat Linux
Keywords:
Cross references:
Obsoletes:
CVE Names: CAN-2004-0110


1. Topic:

Updated libxml2 packages that fix an overflow when parsing remote resources are now available.

2. Relevant releases/architectures:

Red Hat Linux 9 - i386

3. Problem description:

libxml2 is a library for manipulating XML files.

Yuuichi Teranishi discovered a flaw in libxml2 versions prior to 2.6.6. When fetching a remote resource via FTP or HTTP, libxml2 uses special parsing routines. These routines can overflow a buffer if passed a very long URL. If an attacker is able to find an application using libxml2 that parses remote resources and allows them to influence the URL, then this flaw could be used to execute arbitrary code. The Common Vulnerabilities and Exposures project (cve.mitre.org/) has assigned the name CAN-2004-0110 to this issue.

All users are advised to upgrade to these updated packages, which contain a backported fix and are not vulnerable to this issue.

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:

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

5. RPMs required:

Red Hat Linux 9:

SRPMS:
ftp://updates.redhat.com/9/en/os/SRPMS/libxml2-2.5.4-2.src.rpm

i386:
ftp://updates.redhat.com/9/en/os/i386/libxml2-2.5.4-2.i386.rpm
ftp://updates.redhat.com/9/en/os/i386/libxml2-devel-2.5.4-2.i386.rpm
ftp://updates.redhat.com/9/en/os/i386/libxml2-python-2.5.4-2.i386.rpm

6. Verification:

MD5 sum Package Name


7a1834ebc511ce8752dab9265ed0e3dd 9/en/os/SRPMS/libxml2-2.5.4-2.src.rpm
f9663aacd4980f9e2805f90ea6f8fd93 9/en/os/i386/libxml2-2.5.4-2.i386.rpm
ef2c2b5b8644ac165529a45d34029d3d 9/en/os/i386/libxml2-devel-2.5.4-2.i386.rpm
1c269ed922321b3cce101408767de3ad 9/en/os/i386/libxml2-python-2.5.4-2.i386.rpm

These packages are GPG signed by Red Hat for security. Our key is available from https://www.redhat.com/security/keys.html

You can verify each package with the following command:

rpm --checksig -v <filename>

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 <filename>

7. References:

http://mail.gnome.org/archives/xml/2004-February/msg00070.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0110

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact details at https://www.redhat.com/solutions/security/news/contact.html

Copyright 2003 Red Hat, Inc.