Important CentOS qemu-kvm Security Update

Metadata

medium
4.6
qemu-guest-agent-0.12.1.2-2.448.el6_6.2.i686.rpm, qemu-guest-agent-0.12.1.2-2.448.el6_6.2.x86_64.rpm, qemu-img-0.12.1.2-2.448.el6_6.2.x86_64.rpm, qemu-kvm-0.12.1.2-2.448.el6_6.2.src.rpm, qemu-kvm-0.12.1.2-2.448.el6_6.2.x86_64.rpm, qemu-kvm-tools-0.12.1.2-2.448.el6_6.2.x86_64.rpm
CVE-2014-8106
rhn.redhat.com, lists.centos.org
2015-04-22
2017-07-27 19:09
Important CentOS qemu-kvm Security Update
CVE-2014-8106 xen
CVE-2014-8106 qemu
CVE-2014-8106 qemu-kvm
CVE-2014-8106
2017-04-01 19:08
2017-01-05 20:13

Description


An updated qemu-kvm package that fixes one security issue and one bug is
now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having Important 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.

KVM (Kernel-based Virtual Machine) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems. The qemu-kvm package provides the
user-space component for running virtual machines using KVM.

It was found that the Cirrus blit region checks were insufficient. A
privileged guest user could use this flaw to write outside of VRAM-
allocated buffer boundaries in the host's QEMU process address space with
attacker-provided data. (CVE-2014-8106)

This issue was found by Paolo Bonzini of Red Hat.

This update also fixes the following bug:

* Previously, the effective downtime during the last phase of a live
migration would sometimes be much higher than the maximum downtime
specified by 'migration_downtime' in vdsm.conf. This problem has been
corrected. The value of 'migration_downtime' is now honored and the
migration is aborted if the downtime cannot be achieved. (BZ#1142756)

All qemu-kvm users are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue. After installing this
update, shut down all running virtual machines. Once all virtual machines
have shut down, start them again for this update to take effect.
Please see https://www.redhat.com/footer/terms-of-use.html

Am I vulnerable?

The constraints below list the versions that this vulnerability is patched in, and versions that are unaffected. If a patch is ready but unrealeased, then it is pending.

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Affected package information

Release Package Patched in
6 qemu-guest-agent qemu-guest-agent-0.12.1.2-2.448.el6_6.2.i686.rpm
qemu-guest-agent qemu-guest-agent-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-img qemu-img-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-kvm qemu-kvm-0.12.1.2-2.448.el6_6.2.src.rpm
qemu-kvm qemu-kvm-0.12.1.2-2.448.el6_6.2.x86_64.rpm
qemu-kvm-tools qemu-kvm-tools-0.12.1.2-2.448.el6_6.2.x86_64.rpm