A denial of service flaw was found in the way libxml2 processed certain content. If an application linked against libxml2 processed malformed XML content, it could cause the application to use an excessive amount of CPU time and memory, and stop responding. (CVE-2003-1564)

====================================================================                   Red Hat Security Advisory

Synopsis:          Important: libxml2 security update
Advisory ID:       RHSA-2008:0886-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2008:0886.html
Issue date:        2008-09-11
CVE Names:         CVE-2003-1564 CVE-2008-3529 
====================================================================
1. Summary:

Updated libxml2 packages that fix various security issues are now available
for Red Hat Enterprise Linux 2.1.

This update has been rated as having important security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1  - i386, ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
Red Hat Enterprise Linux ES version 2.1 - i386
Red Hat Enterprise Linux WS version 2.1 - i386

3. Description:

The libxml2 packages provide a library that allows you to manipulate XML
files. It includes support to read, modify, and write XML and HTML files.

A heap-based buffer overflow flaw was found in the way libxml2 handled long
XML entity names. If an application linked against libxml2 processed
untrusted malformed XML content, it could cause the application to crash
or, possibly, execute arbitrary code. (CVE-2008-3529)

A denial of service flaw was found in the way libxml2 processed certain
content. If an application linked against libxml2 processed malformed XML
content, it could cause the application to use an excessive amount of CPU
time and memory, and stop responding. (CVE-2003-1564)

All users of libxml2 are advised to upgrade to these updated packages,
which contain backported patches to resolve these issues.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network.  Details on how to use
the Red Hat Network to apply this update are available at

5. Bugs fixed (https://bugzilla.redhat.com/):

461015 - CVE-2008-3529 libxml2: long entity name heap buffer overflow
461107 - CVE-2003-1564 libxml2: billion laughs DoS attack

6. Package List:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 :

Source:

i386:
libxml2-2.4.19-11.ent.i386.rpm
libxml2-devel-2.4.19-11.ent.i386.rpm
libxml2-python-2.4.19-11.ent.i386.rpm

ia64:
libxml2-2.4.19-11.ent.ia64.rpm
libxml2-devel-2.4.19-11.ent.ia64.rpm
libxml2-python-2.4.19-11.ent.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

Source:

ia64:
libxml2-2.4.19-11.ent.ia64.rpm
libxml2-devel-2.4.19-11.ent.ia64.rpm
libxml2-python-2.4.19-11.ent.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

Source:

i386:
libxml2-2.4.19-11.ent.i386.rpm
libxml2-devel-2.4.19-11.ent.i386.rpm
libxml2-python-2.4.19-11.ent.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

Source:

i386:
libxml2-2.4.19-11.ent.i386.rpm
libxml2-devel-2.4.19-11.ent.i386.rpm
libxml2-python-2.4.19-11.ent.i386.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://access.redhat.com/security/team/key#package

7. References:

https://www.cve.org/CVERecord?id=CVE-2003-1564
https://www.cve.org/CVERecord?id=CVE-2008-3529
https://access.redhat.com/security/updates/classification#important

8. Contact:

The Red Hat security contact is .  More contact
details at https://access.redhat.com/security/team/contact

Copyright 2008 Red Hat, Inc.