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Red Hat Security Advisory 2015-0643-01

Red Hat Security Advisory 2015-0643-01
Posted Mar 6, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-0643-01 - KVM 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 Linux OpenStack Platform. 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. This issue was found by Paolo Bonzini of Red Hat.

tags | advisory
systems | linux, redhat
advisories | CVE-2014-8106
SHA-256 | bf762400139ffabbb3e771c0de115ba56b9a53129261f094e7f1799367f8192a

Red Hat Security Advisory 2015-0643-01

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=====================================================================
Red Hat Security Advisory

Synopsis: Important: qemu-kvm-rhev security update
Advisory ID: RHSA-2015:0643-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-0643.html
Issue date: 2015-03-05
CVE Names: CVE-2014-8106
=====================================================================

1. Summary:

Updated qemu-kvm-rhev packages that fix one security issue are now
available for Red Hat Enterprise Linux OpenStack Platform 6.0 for Red Hat
Enterprise Linux 7.

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux OpenStack Platform 6.0 for RHEL 7 - x86_64

3. Description:

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 Linux OpenStack Platform.

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.

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.

4. 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/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1169454 - CVE-2014-8106 qemu: cirrus: insufficient blit region checks

6. Package List:

Red Hat Enterprise Linux OpenStack Platform 6.0 for RHEL 7:

Source:
qemu-kvm-rhev-2.1.2-23.el7.src.rpm

x86_64:
libcacard-devel-rhev-2.1.2-23.el7.x86_64.rpm
libcacard-rhev-2.1.2-23.el7.x86_64.rpm
libcacard-tools-rhev-2.1.2-23.el7.x86_64.rpm
qemu-img-rhev-2.1.2-23.el7.x86_64.rpm
qemu-kvm-common-rhev-2.1.2-23.el7.x86_64.rpm
qemu-kvm-rhev-2.1.2-23.el7.x86_64.rpm
qemu-kvm-rhev-debuginfo-2.1.2-23.el7.x86_64.rpm
qemu-kvm-tools-rhev-2.1.2-23.el7.x86_64.rpm

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

7. References:

https://access.redhat.com/security/cve/CVE-2014-8106
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2015 Red Hat, Inc.
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