Security Advisory Moderate: rhev-hypervisor6 security and bug fix update

Advisory: RHSA-2012:0422-1
Type: Security Advisory
Severity: Moderate
Issued on: 2012-03-26
Last updated on: 2012-03-26
Affected Products: Red Hat Enterprise Virtualization 3
CVEs ( CVE-2012-0045


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.

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.

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.


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

Updated packages

Red Hat Enterprise Virtualization 3

File outdated by:  RHEA-2016:1555
    MD5: 6d19556c1b249dfd5766ec16f059468a
SHA-256: dc186e0b5a698c89ecb6856e38d7ea1a396173d87438e73f9e0cfe8548b1b0d7
File outdated by:  RHEA-2016:1555
    MD5: 67e928e97491e4183a48a44aa3c1459c
SHA-256: f815fd9a2602f9cbf2faff31b4c1bf7f39cb64a508b91dcff24ae94a3bd9b9b9
File outdated by:  RHSA-2012:1375
    MD5: aa278006531237d0b21e08ce12118f3e
SHA-256: 74f5c893ee41bc86a128e83a343cbc4fef464a71c11418a004d2cac709efaa14
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

772867 - CVE-2012-0207 kernel: igmp: Avoid zero delay when receiving odd mixture of IGMP queries
773370 - CVE-2012-0045 kernel: kvm: syscall instruction induced guest panic
796913 - rhev-hypervisor6 6.2 Update 3 Release bugzilla
796915 - RHEV-H 6.2 register to SAM failed via TUI.
798183 - RHEV-H 6.2.z name is incorrect.


These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:

The Red Hat security contact is More contact details at