(RHSA-2004:650) libxml security update

The libxml package contains a library for manipulating XML files.

Multiple buffer overflow bugs have been found in libxml versions prior to
2.6.14. If an attacker can trick a user into passing a specially crafted
FTP URL or FTP proxy URL to an application that uses the vulnerable
functions of libxml, it could be possible to execute arbitrary code.
Additionally, if an attacker can return a specially crafted DNS request to
libxml, it could be possible to execute arbitrary code. The Common
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name
CAN-2004-0989 to this issue.

Yuuichi Teranishi discovered a flaw in libxml versions prior to 2.6.6.
When fetching a remote resource via FTP or HTTP, libxml 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 libxml 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 this updated package, which contains
backported patches and is not vulnerable to these issues.