Important CentOS kvm Update


kmod-kvm-83-249.el5.centos.5.x86_64.rpm, kmod-kvm-debug-83-249.el5.centos.5.x86_64.rpm, kvm-83-249.el5.centos.5.src.rpm, kvm-83-249.el5.centos.5.x86_64.rpm, kvm-qemu-img-83-249.el5.centos.5.x86_64.rpm, kvm-tools-83-249.el5.centos.5.x86_64.rpm
2017-07-27 19:04
Important CentOS xen Update
CVE-2012-3515 qemu-kvm
CVE-2012-3515 qemu
CVE-2012-3515 xen
2017-04-01 19:06
2017-01-05 20:10


Updated kvm packages that fix one security issue are now available for
Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having
important security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from the
CVE link in the References section.

KVM (Kernel-based Virtual Machine) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems. KVM is a Linux kernel module built
for the standard Red Hat Enterprise Linux kernel.

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

* When guests were started from the command line ("/usr/libexec/qemu-kvm"),
and without specifying a serial or parallel 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 on Red Hat Enterprise
Linux 5.)

* Guests that were managed via libvirt, such as when using Virtual Machine
Manager (virt-manager), but that have a serial or parallel 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 KVM users should upgrade to these updated packages, which correct this
issue. Note: The procedure in the Solution section must be performed before
this update will take effect.
Please see

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Affected package information

Release Package Patched in
5 kmod-kvm kmod-kvm-83-249.el5.centos.5.x86_64.rpm
kmod-kvm-debug kmod-kvm-debug-83-249.el5.centos.5.x86_64.rpm
kvm kvm-83-249.el5.centos.5.src.rpm
kvm kvm-83-249.el5.centos.5.x86_64.rpm
kvm-qemu-img kvm-qemu-img-83-249.el5.centos.5.x86_64.rpm
kvm-tools kvm-tools-83-249.el5.centos.5.x86_64.rpm