Issued:

2013-05-09

Updated:

2013-05-09

RHSA-2013:0807 - Low: hypervkvpd security and bug fix update

Synopsis

Low: hypervkvpd security and bug fix update

Type/Severity

Security Advisory Low

Topic

An updated hypervkvpd package that fixes one security issue and one bug is now available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having low security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

Description

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:

• The hypervkvpd daemon did not close the file descriptors for pool files when they were updated. This could eventually lead to hypervkvpd crashing with a "KVP: Failed to open file, pool: 1" error after consuming all available file descriptors. With this update, the file descriptors are closed, correcting this issue. (BZ#953502)

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.

Solution

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

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258

Affected Products

Updated Packages

• hypervkvpd-0-0.7.el5_9.3.src.rpm
• hypervkvpd-debuginfo-0-0.7.el5_9.3.i686.rpm
• hypervkvpd-debuginfo-0-0.7.el5_9.3.ia64.rpm
• hypervkvpd-0-0.7.el5_9.3.x86_64.rpm
• hypervkvpd-0-0.7.el5_9.3.i686.rpm
• hypervkvpd-0-0.7.el5_9.3.ia64.rpm
• hypervkvpd-debuginfo-0-0.7.el5_9.3.x86_64.rpm

Fixes

• This content is not included.BZ - 877572
• This content is not included.BZ - 953502

CVEs

• CVE-2012-5532

References

• https://access.redhat.com/security/updates/classification/#low

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.