KVM (Kernel-based Virtual Machine) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems. The qemu-kvm package provides the
user-space component for running virtual machines using KVM.
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.
This update also fixes the following bugs:
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. (BZ#1099941)
All qemu-kvm users 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.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
RedHat | 6 | x86_64 | qemu-kvm-debuginfo | < 0.12.1.2-2.415.el6_5.10 | qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.10.x86_64.rpm |
RedHat | 6 | i686 | qemu-guest-agent | < 0.12.1.2-2.415.el6_5.10 | qemu-guest-agent-0.12.1.2-2.415.el6_5.10.i686.rpm |
RedHat | 6 | x86_64 | qemu-kvm-tools | < 0.12.1.2-2.415.el6_5.10 | qemu-kvm-tools-0.12.1.2-2.415.el6_5.10.x86_64.rpm |
RedHat | 6 | x86_64 | qemu-img | < 0.12.1.2-2.415.el6_5.10 | qemu-img-0.12.1.2-2.415.el6_5.10.x86_64.rpm |
RedHat | 6 | src | qemu-kvm | < 0.12.1.2-2.415.el6_5.10 | qemu-kvm-0.12.1.2-2.415.el6_5.10.src.rpm |
RedHat | 6 | i686 | qemu-kvm-debuginfo | < 0.12.1.2-2.415.el6_5.10 | qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.10.i686.rpm |
RedHat | 6 | x86_64 | qemu-kvm | < 0.12.1.2-2.415.el6_5.10 | qemu-kvm-0.12.1.2-2.415.el6_5.10.x86_64.rpm |
RedHat | 6 | x86_64 | qemu-guest-agent | < 0.12.1.2-2.415.el6_5.10 | qemu-guest-agent-0.12.1.2-2.415.el6_5.10.x86_64.rpm |