expat security update

CentOS Errata and Security Advisory CESA-2009:1625

Expat is a C library written by James Clark for parsing XML documents.

Two buffer over-read flaws were found in the way Expat handled malformed
UTF-8 sequences when processing XML files. A specially-crafted XML file
could cause applications using Expat to crash while parsing the file.
(CVE-2009-3560, CVE-2009-3720)

All expat users should upgrade to these updated packages, which contain
backported patches to correct these issues. After installing the updated
packages, applications using the Expat library must be restarted for the
update to take effect.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2009-December/078510.html
https://lists.centos.org/pipermail/centos-announce/2009-December/078511.html
https://lists.centos.org/pipermail/centos-announce/2009-December/078512.html
https://lists.centos.org/pipermail/centos-announce/2009-December/078513.html
https://lists.centos.org/pipermail/centos-announce/2009-December/078540.html
https://lists.centos.org/pipermail/centos-announce/2009-December/078541.html

Affected packages:
expat
expat-devel

Upstream details at:
https://access.redhat.com/errata/RHSA-2009:1625