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Test ID:1.3.6.1.4.1.25623.1.0.870823
Category:Red Hat Local Security Checks
Title:RedHat Update for qemu-kvm RHSA-2012:1234-01
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.

A flaw was found in the way QEMU handled VT100 terminal escape sequences
when emulating certain character devices. A guest user with privileges to
write to a character device that is emulated on the host using a virtual
console back-end could use this flaw to crash the qemu-kvm process on the
host or, possibly, escalate their privileges on the host. (CVE-2012-3515)

This flaw did not affect the default use of KVM. Affected configurations
were:

* When guests were started from the command line ('/usr/libexec/qemu-kvm')
without the '-nodefaults' option, and also without specifying a
serial or parallel device, or a virtio-console device, that specifically
does not use a virtual console (vc) back-end. (Note that Red Hat does not
support invoking 'qemu-kvm' from the command line without
'-nodefaults' on Red Hat Enterprise Linux 6.)

* Guests that were managed via libvirt, such as when using Virtual Machine
Manager (virt-manager), but that have a serial or parallel device, or a
virtio-console device, that uses a virtual console back-end. By default,
guests managed via libvirt will not use a virtual console back-end
for such devices.

Red Hat would like to thank the Xen project for reporting this issue.
All users of qemu-kvm should upgrade to these updated packages, which
resolve this issue. 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:
7.2

CVSS Vector:
AV:L/AC:L/Au:N/C:C/I:C/A:C

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2012-3515
BugTraq ID: 55413
http://www.securityfocus.com/bid/55413
Debian Security Information: DSA-2543 (Google Search)
http://www.debian.org/security/2012/dsa-2543
Debian Security Information: DSA-2545 (Google Search)
http://www.debian.org/security/2012/dsa-2545
http://security.gentoo.org/glsa/glsa-201309-24.xml
https://security.gentoo.org/glsa/201604-03
http://lists.xen.org/archives/html/xen-announce/2012-09/msg00003.html
http://www.openwall.com/lists/oss-security/2012/09/05/10
RedHat Security Advisories: RHSA-2012:1233
http://rhn.redhat.com/errata/RHSA-2012-1233.html
RedHat Security Advisories: RHSA-2012:1234
http://rhn.redhat.com/errata/RHSA-2012-1234.html
RedHat Security Advisories: RHSA-2012:1235
http://rhn.redhat.com/errata/RHSA-2012-1235.html
RedHat Security Advisories: RHSA-2012:1236
http://rhn.redhat.com/errata/RHSA-2012-1236.html
RedHat Security Advisories: RHSA-2012:1262
http://rhn.redhat.com/errata/RHSA-2012-1262.html
RedHat Security Advisories: RHSA-2012:1325
http://rhn.redhat.com/errata/RHSA-2012-1325.html
http://secunia.com/advisories/50472
http://secunia.com/advisories/50528
http://secunia.com/advisories/50530
http://secunia.com/advisories/50632
http://secunia.com/advisories/50689
http://secunia.com/advisories/50860
http://secunia.com/advisories/50913
http://secunia.com/advisories/51413
http://secunia.com/advisories/55082
SuSE Security Announcement: SUSE-SU-2012:1129 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00001.html
SuSE Security Announcement: SUSE-SU-2012:1132 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00003.html
SuSE Security Announcement: SUSE-SU-2012:1133 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
SuSE Security Announcement: SUSE-SU-2012:1135 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00005.html
SuSE Security Announcement: SUSE-SU-2012:1162 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00012.html
SuSE Security Announcement: SUSE-SU-2012:1202 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00024.html
SuSE Security Announcement: SUSE-SU-2012:1203 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00026.html
SuSE Security Announcement: SUSE-SU-2012:1205 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00027.html
SuSE Security Announcement: SUSE-SU-2012:1320 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-10/msg00002.html
SuSE Security Announcement: openSUSE-SU-2012:1153 (Google Search)
http://lists.opensuse.org/opensuse-updates/2012-09/msg00051.html
SuSE Security Announcement: openSUSE-SU-2012:1170 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00016.html
SuSE Security Announcement: openSUSE-SU-2012:1172 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html
SuSE Security Announcement: openSUSE-SU-2012:1174 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00018.html
SuSE Security Announcement: openSUSE-SU-2012:1572 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html
SuSE Security Announcement: openSUSE-SU-2012:1573 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html
http://www.ubuntu.com/usn/USN-1590-1
CopyrightCopyright (c) 2012 Greenbone Networks GmbH

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