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Test ID:1.3.6.1.4.1.25623.1.0.870639
Category:Red Hat Local Security Checks
Title:RedHat Update for qemu-kvm RHSA-2011:0534-01
Summary:The remote host is missing an update for the 'qemu-kvm'; package(s) announced via the referenced advisory.
Description:Summary:
The remote host is missing an update for the 'qemu-kvm'
package(s) announced via the referenced advisory.

Vulnerability Insight:
KVM (Kernel-based Virtual Machine) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems. qemu-kvm is the user-space component
for running virtual machines using KVM.

It was found that the virtio-blk driver in qemu-kvm did not properly
validate read and write requests from guests. A privileged guest user could
use this flaw to crash the guest or, possibly, execute arbitrary code on
the host. (CVE-2011-1750)

It was found that the PIIX4 Power Management emulation layer in qemu-kvm
did not properly check for hot plug eligibility during device removals. A
privileged guest user could use this flaw to crash the guest or, possibly,
execute arbitrary code on the host. (CVE-2011-1751)

Red Hat would like to thank Nelson Elhage for reporting CVE-2011-1751.

This update also fixes several bugs and adds various enhancements.
Documentation for these bug fixes and enhancements will be available
shortly from the Technical Notes document, linked to in the References
section.

All users of qemu-kvm should upgrade to these updated packages, which
contain backported patches to resolve these issues, and fix the bugs and
add the enhancements noted in the Technical Notes. 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.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at the linked
references.

Affected Software/OS:
qemu-kvm on Red Hat Enterprise Linux Desktop (v. 6),
Red Hat Enterprise Linux Server (v. 6),
Red Hat Enterprise Linux Workstation (v. 6)

Solution:
Please Install the Updated Packages.

CVSS Score:
7.4

CVSS Vector:
AV:A/AC:M/Au:S/C:C/I:C/A:C

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2011-1750
Debian Security Information: DSA-2230 (Google Search)
https://www.debian.org/security/2011/dsa-2230
http://lists.fedoraproject.org/pipermail/package-announce/2012-June/081972.html
http://lists.gnu.org/archive/html/qemu-devel/2011-03/msg03019.html
http://lists.gnu.org/archive/html/qemu-devel/2011-03/msg03015.html
http://www.osvdb.org/73756
RedHat Security Advisories: RHSA-2011:0534
http://rhn.redhat.com/errata/RHSA-2011-0534.html
http://secunia.com/advisories/44132
http://secunia.com/advisories/44393
http://secunia.com/advisories/44658
http://secunia.com/advisories/44660
http://secunia.com/advisories/44900
SuSE Security Announcement: SUSE-SU-2011:0533 (Google Search)
https://hermes.opensuse.org/messages/8572547
SuSE Security Announcement: openSUSE-SU-2011:0510 (Google Search)
http://lists.opensuse.org/opensuse-updates/2011-05/msg00043.html
https://www.ubuntu.com/usn/USN-1145-1/
XForce ISS Database: kvm-virtioblk-priv-escalation(67062)
https://exchange.xforce.ibmcloud.com/vulnerabilities/67062
Common Vulnerability Exposure (CVE) ID: CVE-2011-1751
BugTraq ID: 47927
http://www.securityfocus.com/bid/47927
http://blog.nelhage.com/2011/08/breaking-out-of-kvm/
https://bugzilla.redhat.com/show_bug.cgi?id=699773
https://github.com/nelhage/virtunoid
http://lists.nongnu.org/archive/html/qemu-devel/2011-05/msg01810.html
http://www.openwall.com/lists/oss-security/2011/05/19/2
http://www.osvdb.org/73395
http://secunia.com/advisories/44458
http://secunia.com/advisories/44648
CopyrightCopyright (c) 2012 Greenbone Networks GmbH

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