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AUSCERT External Security Bulletin Redistribution
ESB-2015.2493
Important: qemu-kvm-rhev security update
25 September 2015
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: qemu-kvm-rhev
Publisher: Red Hat
Operating System: Red Hat
KVM
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2015-5225
Reference: ESB-2015.2406
ESB-2015.2298
Original Bulletin:
https://rhn.redhat.com/errata/RHSA-2015-1837.html
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Red Hat Security Advisory
Synopsis: Important: qemu-kvm-rhev security update
Advisory ID: RHSA-2015:1837-01
Product: Red Hat Enterprise Virtualization
Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1837.html
Issue date: 2015-09-24
CVE Names: CVE-2015-5225
=====================================================================
1. Summary:
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.
2. Relevant releases/architectures:
RHEV-H and VDSM for 7 Hosts - 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. Once 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:
RHEV-H and VDSM for 7 Hosts:
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
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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