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Red Hat Security Advisory 2016-1000-01

Red Hat Security Advisory 2016-1000-01
Posted May 10, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-1000-01 - 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 Virtualization Manager. Security Fix: An out-of-bounds read/write access flaw was found in the way QEMU's VGA emulation with VESA BIOS Extensions support performed read/write operations via I/O port methods. A privileged guest user could use this flaw to execute arbitrary code on the host with the privileges of the host's QEMU process.

tags | advisory, arbitrary
systems | linux, redhat
advisories | CVE-2016-3710
MD5 | e455d5dd874ddbff4278c8a190088f07

Red Hat Security Advisory 2016-1000-01

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

Synopsis: Important: qemu-kvm-rhev security update
Advisory ID: RHSA-2016:1000-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-1000.html
Issue date: 2016-05-10
CVE Names: CVE-2016-3710
=====================================================================

1. Summary:

An update for qemu-kvm-rhev is now available for Red Hat Enterprise Linux
OpenStack Platform 6.0 (Juno) for RHEL 7.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) 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 Virtualization Manager.

Security Fix(es):

* An out-of-bounds read/write access flaw was found in the way QEMU's VGA
emulation with VESA BIOS Extensions (VBE) support performed read/write
operations via I/O port methods. A privileged guest user could use this
flaw to execute arbitrary code on the host with the privileges of the
host's QEMU process. (CVE-2016-3710)

Red Hat would like to thank Wei Xiao (360 Marvel Team) and Qinghao Tang
(360 Marvel Team) for reporting this issue.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

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.

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

1331401 - CVE-2016-3710 qemu: incorrect banked access bounds checking in vga module

6. Package List:

Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7:

Source:
qemu-kvm-rhev-2.3.0-31.el7_2.13.src.rpm

x86_64:
libcacard-devel-rhev-2.3.0-31.el7_2.13.x86_64.rpm
libcacard-rhev-2.3.0-31.el7_2.13.x86_64.rpm
libcacard-tools-rhev-2.3.0-31.el7_2.13.x86_64.rpm
qemu-img-rhev-2.3.0-31.el7_2.13.x86_64.rpm
qemu-kvm-common-rhev-2.3.0-31.el7_2.13.x86_64.rpm
qemu-kvm-rhev-2.3.0-31.el7_2.13.x86_64.rpm
qemu-kvm-rhev-debuginfo-2.3.0-31.el7_2.13.x86_64.rpm
qemu-kvm-tools-rhev-2.3.0-31.el7_2.13.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-2016-3710
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 2016 Red Hat, Inc.
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