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Test ID:1.3.6.1.4.1.25623.1.0.871161
Category:Red Hat Local Security Checks
Title:RedHat Update for qemu-kvm RHSA-2014:0420-01
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. The qemu-kvm package provides the
user-space component for running virtual machines using KVM.

Multiple integer overflow, input validation, logic error, and buffer
overflow flaws were discovered in various QEMU block drivers. An attacker
able to modify a disk image file loaded by a guest could use these flaws to
crash the guest, or corrupt QEMU process memory on the host, potentially
resulting in arbitrary code execution on the host with the privileges of
the QEMU process. (CVE-2014-0143, CVE-2014-0144, CVE-2014-0145,
CVE-2014-0147)

A buffer overflow flaw was found in the way the virtio_net_handle_mac()
function of QEMU processed guest requests to update the table of MAC
addresses. A privileged guest user could use this flaw to corrupt QEMU
process memory on the host, potentially resulting in arbitrary code
execution on the host with the privileges of the QEMU process.
(CVE-2014-0150)

A divide-by-zero flaw was found in the seek_to_sector() function of the
parallels block driver in QEMU. An attacker able to modify a disk image
file loaded by a guest could use this flaw to crash the guest.
(CVE-2014-0142)

A NULL pointer dereference flaw was found in the QCOW2 block driver in
QEMU. An attacker able to modify a disk image file loaded by a guest could
use this flaw to crash the guest. (CVE-2014-0146)

It was found that the block driver for Hyper-V VHDX images did not
correctly calculate BAT (Block Allocation Table) entries due to a missing
bounds check. An attacker able to modify a disk image file loaded by a
guest could use this flaw to crash the guest. (CVE-2014-0148)

The CVE-2014-0143 issues were discovered by Kevin Wolf and Stefan Hajnoczi
of Red Hat, the CVE-2014-0144 issues were discovered by Fam Zheng, Jeff
Cody, Kevin Wolf, and Stefan Hajnoczi of Red Hat, the CVE-2014-0145 issues
were discovered by Stefan Hajnoczi of Red Hat, the CVE-2014-0150 issue was
discovered by Michael S. Tsirkin of Red Hat, the CVE-2014-0142,
CVE-2014-0146, and CVE-2014-0147 issues were discovered by Kevin Wolf of
Red Hat, and the CVE-2014-0148 issue was discovered by Jeff Cody of
Red Hat.

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.

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:
4.9

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

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2014-0142
Debian Security Information: DSA-3044 (Google Search)
http://www.debian.org/security/2014/dsa-3044
RedHat Security Advisories: RHSA-2014:0420
http://rhn.redhat.com/errata/RHSA-2014-0420.html
RedHat Security Advisories: RHSA-2014:0421
http://rhn.redhat.com/errata/RHSA-2014-0421.html
Common Vulnerability Exposure (CVE) ID: CVE-2014-0143
Common Vulnerability Exposure (CVE) ID: CVE-2014-0144
http://git.qemu.org/?p=qemu.git;a=commit;h=24342f2cae47d03911e346fe1e520b00dc2818e0
http://git.qemu.org/?p=qemu.git;a=commit;h=2d51c32c4b511db8bb9e58208f1e2c25e4c06c85
http://git.qemu.org/?p=qemu.git;a=commit;h=5dab2faddc8eaa1fb1abdbe2f502001fc13a1b21
http://git.qemu.org/?p=qemu.git;a=commit;h=63fa06dc978f3669dbfd9443b33cde9e2a7f4b41
http://git.qemu.org/?p=qemu.git;a=commit;h=6d4b9e55fc625514a38d27cff4b9933f617fa7dc
http://git.qemu.org/?p=qemu.git;a=commit;h=7b103b36d6ef3b11827c203d3a793bf7da50ecd6
http://git.qemu.org/?p=qemu.git;a=commit;h=97f1c45c6f456572e5b504b8614e4a69e23b8e3a
http://git.qemu.org/?p=qemu.git;a=commit;h=a1b3955c9415b1e767c130a2f59fee6aa28e575b
http://git.qemu.org/?p=qemu.git;a=commit;h=ce48f2f441ca98885267af6fd636a7cb804ee646
http://git.qemu.org/?p=qemu.git;a=commit;h=d65f97a82c4ed48374a764c769d4ba1ea9724e97
http://git.qemu.org/?p=qemu.git;a=commit;h=f56b9bc3ae20fc93815b34aa022be919941406ce
https://bugzilla.redhat.com/show_bug.cgi?id=1079240
https://www.vulnerabilitycenter.com/#!vul=44767
Common Vulnerability Exposure (CVE) ID: CVE-2014-0145
https://lists.gnu.org/archive/html/qemu-devel/2014-03/msg04994.html
http://www.openwall.com/lists/oss-security/2014/03/26/8
Common Vulnerability Exposure (CVE) ID: CVE-2014-0146
Common Vulnerability Exposure (CVE) ID: CVE-2014-0147
http://git.qemu.org/?p=qemu.git;a=commitdiff;h=246f65838d19db6db55bfb41117c35645a2c4789
https://bugzilla.redhat.com/show_bug.cgi?id=1078848
https://bugzilla.redhat.com/show_bug.cgi?id=1086717
Common Vulnerability Exposure (CVE) ID: CVE-2014-0148
http://git.qemu.org/?p=qemu.git;a=commit;h=1d7678dec4761acdc43439da6ceda41a703ba1a6
https://bugzilla.redhat.com/show_bug.cgi?id=1078212
Common Vulnerability Exposure (CVE) ID: CVE-2014-0150
Debian Security Information: DSA-2909 (Google Search)
http://www.debian.org/security/2014/dsa-2909
Debian Security Information: DSA-2910 (Google Search)
http://www.debian.org/security/2014/dsa-2910
http://article.gmane.org/gmane.comp.emulators.qemu/266768
http://thread.gmane.org/gmane.comp.emulators.qemu/266713
http://secunia.com/advisories/57878
http://secunia.com/advisories/58191
http://www.ubuntu.com/usn/USN-2182-1
CopyrightCopyright (C) 2014 Greenbone Networks GmbH

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