libvirt security update

CentOS Errata and Security Advisory CESA-2013:0199

The libvirt library is a C API for managing and interacting with the
virtualization capabilities of Linux and other operating systems. In
addition, libvirt provides tools for remote management of virtualized
systems.

A flaw was found in the way libvirtd handled connection cleanup (when a
connection was being closed) under certain error conditions. A remote
attacker able to establish a read-only connection to libvirtd could use
this flaw to crash libvirtd or, potentially, execute arbitrary code with
the privileges of the root user. (CVE-2013-0170)

This issue was discovered by Tingting Zheng of Red Hat.

All users of libvirt are advised to upgrade to these updated packages,
which contain a backported patch to correct this issue. After installing
the updated packages, libvirtd will be restarted automatically.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2013-January/081377.html

Affected packages:
libvirt
libvirt-client
libvirt-devel
libvirt-lock-sanlock
libvirt-python

Upstream details at:
https://access.redhat.com/errata/RHSA-2013:0199