Synopsis

Important: qemu-kvm-rhev security update

Type/Severity

Security Advisory: Important

Topic

Updated qemu-kvm-rhev packages that fix one security issue are now
available for Red Hat Enterprise Virtualization Hypervisor 7.

Red Hat Product Security 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.

Description

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

A heap-based buffer overflow issue was found in the QEMU emulator's VNC
display driver. It could occur while refreshing the VNC server's display
surface using the vnc_refresh_server_surface() routine. A privileged guest
user could use this flaw to corrupt the heap memory and crash the QEMU
process instance, or to potentially use it to execute arbitrary code on the
host. (CVE-2015-5225)

Red Hat would like to thank Mr Qinghao Tang from QIHU 360 Inc. and Mr
Zuozhi from Alibaba Inc. for reporting this issue.

All qemu-kvm-rhev users are advised to upgrade to these updated packages,
which contain a backported patch to correct 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.

Solution

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

For details on how to apply this update, refer to:

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

Affected Products

• Red Hat Virtualization 3 for RHEL 7 x86_64

Fixes

• BZ - 1255896 - CVE-2015-5225 Qemu: ui: vnc: heap memory corruption in vnc_refresh_server_surface

CVEs

• CVE-2015-5225

References

• https://access.redhat.com/security/updates/classification/#important

Red Hat Virtualization 3 for RHEL 7

SRPM
qemu-kvm-rhev-2.1.2-23.el7_1.9.src.rpm	SHA-256: 1ea6d4dcb7382e5ee2d8b16d376197a655b037b3bdeb1e6bd49c3a886f1e49b9
x86_64
libcacard-devel-rhev-2.1.2-23.el7_1.9.x86_64.rpm	SHA-256: 3e5f1331aadb04344f1a7256ef8ff72b498c1a54e400309496a73a49230807a9
libcacard-rhev-2.1.2-23.el7_1.9.x86_64.rpm	SHA-256: 2163bd48658e1f82975c541388493cfa6bd63f45f4f3bd0f11a2ae3dac876873
libcacard-tools-rhev-2.1.2-23.el7_1.9.x86_64.rpm	SHA-256: f796ab67bec4316e83b4c288014235251d2fef7bd5237ec31cc7a096910f6f78
qemu-img-rhev-2.1.2-23.el7_1.9.x86_64.rpm	SHA-256: 80479ab8b04237b75c82ed2e1f3d250ea6d5876218a10bc63510ae26d99d68ef
qemu-kvm-common-rhev-2.1.2-23.el7_1.9.x86_64.rpm	SHA-256: c13cd3ba50ed87cf011b5c79b7ef2d08c88a6cda8f3c1ef58077f512290f3418
qemu-kvm-rhev-2.1.2-23.el7_1.9.x86_64.rpm	SHA-256: 8499fd600630df6aabb11f0bb739463fc1d263a3ed0785fed78c1dd2520efa03
qemu-kvm-rhev-debuginfo-2.1.2-23.el7_1.9.x86_64.rpm	SHA-256: 8bafb71c3b89d9f05b36a8e0266809476978441583bb595e3708263eb622114e
qemu-kvm-tools-rhev-2.1.2-23.el7_1.9.x86_64.rpm	SHA-256: 1bbcd4b5443b5bd99c3d9d1cfdd9420eb0c13dcd343c99b74f9219d1b1173099