Red Hat Security Advisory
Synopsis: Updated libxml2 packages fix security
vulnerability
Advisory ID: RHSA-2004:091-02
Issue date: 2004-03-03
Updated on: 2004-03-03
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.
[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
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/libxml2-2.5.4-3.rh9.src.rpm
i386:
ftp://updates.redhat.com/9/en/os/i386/libxml2-2.5.4-3.rh9.i386.rpm
ftp://updates.redhat.com/9/en/os/i386/libxml2-devel-2.5.4-3.rh9.i386.rpm
ftp://updates.redhat.com/9/en/os/i386/libxml2-python-2.5.4-3.rh9.i386.rpm
6. Verification:
MD5 sum Package Name
cb550a537cbc60b95dcc4396ab419466
9/en/os/SRPMS/libxml2-2.5.4-3.rh9.src.rpm
b063360d9efb8f4de082f1324fdcd421
9/en/os/i386/libxml2-2.5.4-3.rh9.i386.rpm
8590c8fcd8268d3b682531a4428f14f8
9/en/os/i386/libxml2-devel-2.5.4-3.rh9.i386.rpm
d34886934ad6c00607e0117815bc1e0a
9/en/os/i386/libxml2-python-2.5.4-3.rh9.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.