Oracle Linux 6 : qemu-kvm (ELSA-2014-1075)

This script is Copyright (C) 2014-2016 Tenable Network Security, Inc.

Synopsis :

The remote Oracle Linux host is missing one or more security updates.

Description :

From Red Hat Security Advisory 2014:1075 :

Updated qemu-kvm packages that fix two security issues and three bugs
are now available for Red Hat Enterprise Linux 6.

Red Hat Product Security 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 package provides
the user-space component for running virtual machines using KVM.

Two integer overflow flaws were found in the QEMU block driver for
QCOW version 1 disk images. A user able to alter the QEMU disk image
files loaded by a guest could use either of these flaws 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-2014-0222, CVE-2014-0223)

Red Hat would like to thank NSA for reporting these issues.

This update also fixes the following bugs :

* In certain scenarios, when performing live incremental migration,
the disk size could be expanded considerably due to the transfer of
unallocated sectors past the end of the base image. With this update,
the bdrv_is_allocated() function has been fixed to no longer return
'True' for unallocated sectors, and the disk size no longer changes
after performing live incremental migration. (BZ#1109715)

* This update enables ioeventfd in virtio-scsi-pci. This allows QEMU
to process I/O requests outside of the vCPU thread, reducing the
latency of submitting requests and improving single task throughput.

* Prior to this update, vendor-specific SCSI commands issued from a
KVM guest did not reach the target device due to QEMU considering such
commands as invalid. This update fixes this bug by properly
propagating vendor-specific SCSI commands to the target device.

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.

See also :

Solution :

Update the affected qemu-kvm packages.

Risk factor :

High / CVSS Base Score : 7.5
CVSS Temporal Score : 5.5
Public Exploit Available : false

Family: Oracle Linux Local Security Checks

Nessus Plugin ID: 77270 ()

Bugtraq ID: 67357

CVE ID: CVE-2014-0222

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