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AUSCERT External Security Bulletin Redistribution
Important: rhev-hypervisor6 security and bug fix update
11 June 2013
AusCERT Security Bulletin Summary
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 6
Impact/Access: Denial of Service -- Existing Account
CVE Names: CVE-2013-2017 CVE-2013-1962 CVE-2013-1943
CVE-2013-1935 CVE-2013-0167 CVE-2012-6137
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Red Hat Security Advisory
Synopsis: Important: rhev-hypervisor6 security and bug fix update
Advisory ID: RHSA-2013:0907-01
Product: Red Hat Enterprise Virtualization
Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-0907.html
Issue date: 2013-06-10
CVE Names: CVE-2013-0167 CVE-2013-1935
An updated rhev-hypervisor6 package that fixes two security issues and
various bugs is now available.
The Red Hat Security Response Team has rated this update as having
important 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.
2. Relevant releases/architectures:
RHEV Hypervisor for RHEL-6 - noarch
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
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 KVM initialized a guest's registered pv_eoi
(paravirtualized end-of-interrupt) indication flag when entering the guest.
An unprivileged guest user could potentially use this flaw to crash the
A flaw was found in the way unexpected fields in guestInfo dictionaries
were processed. A privileged guest user could potentially use this flaw to
make the host the guest is running on unavailable to the management server.
Red Hat would like to thank IBM for reporting the CVE-2013-1935 issue. The
CVE-2013-0167 issue was discovered by Dan Kenigsberg of the Red Hat
Enterprise Virtualization team.
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-2013-1962 (libvirt issue)
CVE-2013-2017 and CVE-2013-1943 (kernel issues)
CVE-2012-6137 (subscription-manager issue)
This update also contains the fixes from the following errata:
* vdsm: RHSA-2013:0886, which adds support for Red Hat Enterprise
Virtualization 3.2 clusters.
* ovirt-node: RHBA-2013:0908
Upgrade Note: If you upgrade the Red Hat Enterprise Virtualization
Hypervisor through the 3.2 Manager administration portal, the Host may
appear with the status of "Install Failed". If this happens, place the host
into maintenance mode, then activate it again to get the host back to an
Users of the Red Hat Enterprise Virtualization Hypervisor are advised to
upgrade to this updated package, which corrects these issues.
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
To upgrade Hypervisors in Red Hat Enterprise Virtualization
environments using the disk image provided by this package, refer to:
5. Bugs fixed (http://bugzilla.redhat.com/):
893332 - CVE-2013-0167 vdsm: unfiltered guestInfo dictionary DoS
949981 - CVE-2013-1935 kernel: kvm: pv_eoi guest updates with interrupts disabled
964278 - rhev-hypervisor 6.4 Update 3 release
6. Package List:
RHEV Hypervisor for RHEL-6:
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 <firstname.lastname@example.org>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2013 Red Hat, Inc.
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