Scientific Linux SL6: 2014-0743 Moderate: QEMU-KVM Memory Flaw Fix

Date: Wed, 11 Jun 2014 15:36:20 +0000
Reply-To: scientific-linux-users@
Sender: Security Errata for Scientific Linux
 
From: Pat Riehecky 
Subject: Security ERRATA Moderate: qemu-kvm on SL6.x i386/x86_64
MIME-Version: 1.0

Synopsis: Moderate: qemu-kvm security and bug fix update
Advisory ID: SLSA-2014:0743-1
Issue Date: 2014-06-10
CVE Numbers: CVE-2014-2894
 CVE-2013-4148
 CVE-2013-4151
 CVE-2013-6399
 CVE-2013-4542
 CVE-2013-4541
 CVE-2013-4535
 CVE-2013-4536
 CVE-2014-0182
 CVE-2014-3461
--

Multiple buffer overflow, input validation, and out-of-bounds write flaws
were found in the way the virtio, virtio-net, virtio-scsi, and usb driversof 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)

This update also fixes the following bugs:

* Previously, under certain circumstances, libvirt failed to start guests
which used a non-zero PCI domain and SR-IOV Virtual Functions (VFs), and
returned the following error message:

Can't assign device inside non-zero PCI segment as this KVM module doesn't
support it.

This update fixes this issue and guests using the aforementioned
configuration no longer fail to start.

* Due to an incorrect initialization of the cpus_sts bitmap, which holds
the enablement status of a vCPU, libvirt could fail to start a guest with
an unusual vCPU topology (for example, a guest with three cores and two
sockets). With this update, the initialization of cpus_sts has been
corrected, and libvirt no longer fails to start the aforementioned guests.

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.
--

SL6
 x86_64
 qemu-guest-agent-0.12.1.2-2.415.el6_5.10.x86_64.rpm
 qemu-img-0.12.1.2-2.415.el6_5.10.x86_64.rpm
 qemu-kvm-0.12.1.2-2.415.el6_5.10.x86_64.rpm
 qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.10.x86_64.rpm
 qemu-kvm-tools-0.12.1.2-2.415.el6_5.10.x86_64.rpm
 i386
 qemu-guest-agent-0.12.1.2-2.415.el6_5.10.i686.rpm
 qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.10.i686.rpm

- Scientific Linux Development Team