Issued:

2016-05-09

Updated:

2016-05-09

RHSA-2016:0724 - Important: qemu-kvm security update

Synopsis

Important: qemu-kvm security update

Type/Severity

Security Advisory Important

Topic

An update for qemu-kvm is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

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

Security Fix(es):

• An out-of-bounds read/write access flaw was found in the way QEMU's VGA emulation with VESA BIOS Extensions (VBE) support performed read/write operations via I/O port methods. A privileged guest user could use this flaw to execute arbitrary code on the host with the privileges of the host's QEMU process. (CVE-2016-3710)

Red Hat would like to thank Wei Xiao (360 Marvel Team) and Qinghao Tang (360 Marvel Team) for reporting this issue.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

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 Products

Updated Packages

• libcacard-1.5.3-105.el7_2.4.i686.rpm
• libcacard-tools-1.5.3-105.el7_2.4.ppc64.rpm
• qemu-kvm-debuginfo-1.5.3-105.el7_2.4.i686.rpm
• qemu-kvm-1.5.3-105.el7_2.4.x86_64.rpm
• libcacard-1.5.3-105.el7_2.4.ppc64le.rpm
• qemu-kvm-debuginfo-1.5.3-105.el7_2.4.ppc64.rpm
• qemu-kvm-debuginfo-1.5.3-105.el7_2.4.ppc64le.rpm
• qemu-kvm-debuginfo-1.5.3-105.el7_2.4.x86_64.rpm
• qemu-kvm-tools-1.5.3-105.el7_2.4.x86_64.rpm
• libcacard-1.5.3-105.el7_2.4.x86_64.rpm
• qemu-kvm-debuginfo-1.5.3-105.el7_2.4.ppc.rpm
• libcacard-devel-1.5.3-105.el7_2.4.ppc64.rpm
• libcacard-tools-1.5.3-105.el7_2.4.x86_64.rpm
• libcacard-devel-1.5.3-105.el7_2.4.i686.rpm
• libcacard-tools-1.5.3-105.el7_2.4.ppc64le.rpm
• libcacard-1.5.3-105.el7_2.4.ppc.rpm
• libcacard-devel-1.5.3-105.el7_2.4.ppc64le.rpm
• qemu-img-1.5.3-105.el7_2.4.x86_64.rpm
• qemu-kvm-1.5.3-105.el7_2.4.src.rpm
• qemu-kvm-common-1.5.3-105.el7_2.4.x86_64.rpm
• qemu-img-1.5.3-105.el7_2.4.ppc64.rpm
• libcacard-1.5.3-105.el7_2.4.ppc64.rpm
• libcacard-devel-1.5.3-105.el7_2.4.ppc.rpm
• libcacard-devel-1.5.3-105.el7_2.4.x86_64.rpm
• qemu-img-1.5.3-105.el7_2.4.ppc64le.rpm

Fixes

• This content is not included.BZ - 1331401

CVEs

• CVE-2016-3710

References

• http://www.redhat.com/security/updates/classification/#normal

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.