Issued:
2012-03-26
Updated:
2012-03-26

RHSA-2012:0422 - Moderate: rhev-hypervisor6 security and bug fix update

Synopsis

Moderate: rhev-hypervisor6 security and bug fix update

Type/Severity

Security Advisory Moderate

Topic

An updated rhev-hypervisor6 package that fixes two security issues and one bug is now available.

The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

Description

The rhev-hypervisor6 package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes everything necessary to run and manage virtual machines: A subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent.

Note: Red Hat Enterprise Virtualization Hypervisor is only available for the Intel 64 and AMD64 architectures with virtualization extensions.

A flaw was found in the way the Linux kernel's KVM hypervisor implementation emulated the syscall instruction for 32-bit guests. An unprivileged guest user could trigger this flaw to crash the guest. (CVE-2012-0045)

A divide-by-zero flaw was found in the Linux kernel's igmp_heard_query() function. An attacker able to send certain IGMP (Internet Group Management Protocol) packets to a target system could use this flaw to cause a denial of service. (CVE-2012-0207)

Red Hat would like to thank Stephan Bärwolf for reporting CVE-2012-0045, and Simon McVittie for reporting CVE-2012-0207.

This updated package provides updated components that include fixes for various security issues. These issues have no security impact on Red Hat Enterprise Virtualization Hypervisor itself, however. The security fixes included in this update address the following CVE numbers:

CVE-2011-4077, CVE-2011-4081, CVE-2011-4132, CVE-2011-4347, CVE-2011-4594, CVE-2011-4611, CVE-2011-4622 and CVE-2012-0038 (kernel issues)

CVE-2012-0444 (libvorbis issue)

CVE-2012-0841 (libxml2 issue)

This update also fixes the following bug:

  • The rhev-hypervisor5 and rhev-hypervisor6 packages sometimes updated the symbolic links in the /usr/share/rhev-hypervisor/ directory with incorrect targets. The packages have been updated, they now always update the symbolic links with the correct targets. (BZ#784706)

Users of Red Hat Enterprise Virtualization Hypervisor are advised to upgrade to this updated package, which fixes these issues.

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

ProductVersionArch
Red Hat Virtualization6x86_64

Updated Packages

  • rhev-hypervisor6-tools-6.2-20120320.0.el6_2.noarch.rpm
  • rhev-hypervisor6-6.2-20120320.0.el6_2.src.rpm
  • rhev-hypervisor6-6.2-20120320.0.el6_2.noarch.rpm

Fixes

CVEs

References

Additional information