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Red Hat Security Advisory 2015-1772-01

Red Hat Security Advisory 2015-1772-01
Posted Sep 15, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-1772-01 - KVM 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.

tags | advisory, overflow, arbitrary
systems | linux, redhat
advisories | CVE-2015-5225
MD5 | f147d07cc4dfe893d69206df379205ce

Red Hat Security Advisory 2015-1772-01

Change Mirror Download
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=====================================================================
Red Hat Security Advisory

Synopsis: Important: qemu-kvm-rhev security update
Advisory ID: RHSA-2015:1772-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1772.html
Issue date: 2015-09-14
CVE Names: CVE-2015-5225
=====================================================================

1. Summary:

Updated qemu-kvm-rhev packages that fix one security issue are now
available for Red Hat Enterprise Linux OpenStack Platform 5.0, 6.0 and 7.0,
for Red Hat Enterprise Linux 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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux OpenStack Platform 5.0 for RHEL 7 - x86_64
Red Hat Enterprise Linux OpenStack Platform 6.0 for RHEL 7 - x86_64
Red Hat Enterprise Linux OpenStack Platform 7.0 for RHEL 7 - x86_64

3. 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. After all virtual
machines have shut down, start them again for this update to take effect.

4. 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

5. Bugs fixed (https://bugzilla.redhat.com/):

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

6. Package List:

Red Hat Enterprise Linux OpenStack Platform 5.0 for RHEL 7:

Source:
qemu-kvm-rhev-2.1.2-23.el7_1.9.src.rpm

x86_64:
libcacard-devel-rhev-2.1.2-23.el7_1.9.x86_64.rpm
libcacard-rhev-2.1.2-23.el7_1.9.x86_64.rpm
libcacard-tools-rhev-2.1.2-23.el7_1.9.x86_64.rpm
qemu-img-rhev-2.1.2-23.el7_1.9.x86_64.rpm
qemu-kvm-common-rhev-2.1.2-23.el7_1.9.x86_64.rpm
qemu-kvm-rhev-2.1.2-23.el7_1.9.x86_64.rpm
qemu-kvm-rhev-debuginfo-2.1.2-23.el7_1.9.x86_64.rpm
qemu-kvm-tools-rhev-2.1.2-23.el7_1.9.x86_64.rpm

Red Hat Enterprise Linux OpenStack Platform 6.0 for RHEL 7:

Source:
qemu-kvm-rhev-2.1.2-23.el7_1.9.src.rpm

x86_64:
libcacard-devel-rhev-2.1.2-23.el7_1.9.x86_64.rpm
libcacard-rhev-2.1.2-23.el7_1.9.x86_64.rpm
libcacard-tools-rhev-2.1.2-23.el7_1.9.x86_64.rpm
qemu-img-rhev-2.1.2-23.el7_1.9.x86_64.rpm
qemu-kvm-common-rhev-2.1.2-23.el7_1.9.x86_64.rpm
qemu-kvm-rhev-2.1.2-23.el7_1.9.x86_64.rpm
qemu-kvm-rhev-debuginfo-2.1.2-23.el7_1.9.x86_64.rpm
qemu-kvm-tools-rhev-2.1.2-23.el7_1.9.x86_64.rpm

Red Hat Enterprise Linux OpenStack Platform 7.0 for RHEL 7:

Source:
qemu-kvm-rhev-2.1.2-23.el7_1.9.src.rpm

x86_64:
libcacard-rhev-2.1.2-23.el7_1.9.x86_64.rpm
libcacard-tools-rhev-2.1.2-23.el7_1.9.x86_64.rpm
qemu-img-rhev-2.1.2-23.el7_1.9.x86_64.rpm
qemu-kvm-common-rhev-2.1.2-23.el7_1.9.x86_64.rpm
qemu-kvm-rhev-2.1.2-23.el7_1.9.x86_64.rpm
qemu-kvm-rhev-debuginfo-2.1.2-23.el7_1.9.x86_64.rpm
qemu-kvm-tools-rhev-2.1.2-23.el7_1.9.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2015-5225
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2015 Red Hat, Inc.
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