RHEL 6 : qemu-kvm-rhev (RHSA-2015:0868)

This script is Copyright (C) 2015-2017 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

Updated qemu-kvm-rhev packages that fix one security issue and one bug
are now available for Red Hat Enterprise Virtualization.

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-rhev package
provides the user-space component for running virtual machines using
KVM in environments managed by Red Hat Enterprise Virtualization
Manager.

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 discovered 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 users of qemu-kvm-rhev 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.

See also :

https://www.redhat.com/security/data/cve/CVE-2014-8106.html
http://rhn.redhat.com/errata/RHSA-2015-0868.html

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 4.6
(CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 3.4
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Red Hat Local Security Checks

Nessus Plugin ID: 83048 ()

Bugtraq ID:

CVE ID: CVE-2014-8106

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