RHEL 6 : qemu-kvm-rhev (RHSA-2014:0744)

This script is Copyright (C) 2014-2017 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 several security issues are
now available for Red Hat Enterprise Virtualization.

The Red Hat Security Response Team has rated this update as having
Moderate 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.

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.

Multiple buffer overflow, input validation, and out-of-bounds write
flaws were found in the way the virtio, virtio-net, virtio-scsi, and
usb drivers of QEMU handled state loading after migration. A user able
to alter the savevm data (either on the disk or over the wire during
migration) could use either of these flaws to corrupt QEMU process
memory on the (destination) host, which could potentially result in
arbitrary code execution on the host with the privileges of the QEMU
process. (CVE-2013-4148, CVE-2013-4151, CVE-2013-4535, CVE-2013-4536,
CVE-2013-4541, CVE-2013-4542, CVE-2013-6399, CVE-2014-0182,
CVE-2014-3461)

An out-of-bounds memory access flaw was found in the way QEMU's IDE
device driver handled the execution of SMART EXECUTE OFFLINE commands.
A privileged guest user could use this flaw to corrupt QEMU process
memory on the host, which could potentially result in arbitrary code
execution on the host with the privileges of the QEMU process.
(CVE-2014-2894)

The CVE-2013-4148, CVE-2013-4151, CVE-2013-4535, CVE-2013-4536,
CVE-2013-4541, CVE-2013-4542, CVE-2013-6399, CVE-2014-0182, and
CVE-2014-3461 issues were discovered by Michael S. Tsirkin of Red Hat,
Anthony Liguori, and Michael Roth.

All users of qemu-kvm-rhev are advised to upgrade to these updated
packages, which contain backported patches to correct these issues.
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-2013-4148.html
https://www.redhat.com/security/data/cve/CVE-2013-4151.html
https://www.redhat.com/security/data/cve/CVE-2013-4535.html
https://www.redhat.com/security/data/cve/CVE-2013-4536.html
https://www.redhat.com/security/data/cve/CVE-2013-4541.html
https://www.redhat.com/security/data/cve/CVE-2013-4542.html
https://www.redhat.com/security/data/cve/CVE-2013-6399.html
https://www.redhat.com/security/data/cve/CVE-2014-0182.html
https://www.redhat.com/security/data/cve/CVE-2014-2894.html
https://www.redhat.com/security/data/cve/CVE-2014-3461.html
http://rhn.redhat.com/errata/RHSA-2014-0744.html

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 6.5
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : false

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