Red Hat Linux Advisory: libxml2

Red Hat Security Advisory

Synopsis: Updated libxml2 packages fix security
Advisory ID: RHSA-2004:091-02
Issue date: 2004-03-03
Updated on: 2004-03-03
Product: Red Hat Linux
Cross references:
CVE Names: CAN-2004-0110

1. Topic:

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

[Updated 3 March 2004]
Revised libxml2 packages are now available as the original packages
did not contain a complete patch.

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

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


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:



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.

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