CentOS Errata and Security Advisory CESA-2013:0807
The hypervkvpd package contains hypervkvpd, the guest Microsoft Hyper-V Key-Value Pair (KVP) daemon. The daemon passes basic information to the host through VMBus, such as the guest IP address, fully qualified domain name, operating system name, and operating system release number.
A denial of service flaw was found in the way hypervkvpd processed certain Netlink messages. A local, unprivileged user in a guest (running on Microsoft Hyper-V) could send a Netlink message that, when processed, would cause the guest's hypervkvpd daemon to exit. (CVE-2012-5532)
The CVE-2012-5532 issue was discovered by Florian Weimer of the Red Hat Product Security Team.
This update also fixes the following bug:
Users of hypervkvpd are advised to upgrade to this updated package, which contains backported patches to correct these issues. After installing the update, it is recommended to reboot all guest machines.
Merged security bulletin from advisories: http://lists.centos.org/pipermail/centos-announce/2013-May/019717.html
Affected packages: hypervkvpd
Upstream details at: https://rhn.redhat.com/errata/RHSA-2013-0807.html