[RHSA-2017:1206-01] Important: qemu-kvm security update

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Red Hat Security Advisory

 

Synopsis: Important: qemu-kvm security update

Advisory ID: RHSA-2017:1206-01

Product: Red Hat Enterprise Linux

Advisory URL: https://access.redhat.com/errata/RHSA-2017:1206

Issue date: 2017-05-09

CVE Names: CVE-2016-9603 CVE-2017-2633 CVE-2017-7718

CVE-2017-7980

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1. Summary:

 

An update for qemu-kvm is now available for Red Hat Enterprise Linux 6.

 

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.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

 

3. Description:

 

Kernel-based Virtual Machine (KVM) is a full virtualization solution for

Linux on a variety of architectures. The qemu-kvm package provides the

user-space component for running virtual machines that use KVM.

 

Security Fix(es):

 

* A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA

emulator's VNC display driver support; the issue could occur when a VNC

client attempted to update its display after a VGA operation is performed

by a guest. A privileged user/process inside a guest could use this flaw to

crash the QEMU process or, potentially, execute arbitrary code on the host

with privileges of the QEMU process. (CVE-2016-9603)

 

* An out-of-bounds r/w access issue was found in QEMU's Cirrus CLGD 54xx

VGA Emulator support. The vulnerability could occur while copying VGA data

via various bitblt functions. A privileged user inside a guest could use

this flaw to crash the QEMU process or, potentially, execute arbitrary code

on the host with privileges of the QEMU process. (CVE-2017-7980)

 

* An out-of-bounds memory access issue was found in QEMU's VNC display

driver support. The vulnerability could occur while refreshing the VNC

display surface area in the 'vnc_refresh_server_surface'. A user/process

inside a guest could use this flaw to crash the QEMU process, resulting in

a denial of service. (CVE-2017-2633)

 

* An out-of-bounds access issue was found in QEMU's Cirrus CLGD 54xx VGA

Emulator support. The vulnerability could occur while copying VGA data

using bitblt functions (for example, cirrus_bitblt_rop_fwd_transp_). A

privileged user inside a guest could use this flaw to crash the QEMU

process, resulting in denial of service. (CVE-2017-7718)

 

Red Hat would like to thank Jiangxin (PSIRT Huawei Inc.) and Li Qiang

(Qihoo 360 Gear Team) for reporting CVE-2017-7980 and Jiangxin (PSIRT

Huawei Inc.) for reporting CVE-2017-7718.

 

4. 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.

 

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

 

1400438 - CVE-2017-2633 qemu-kvm coredump in vnc_refresh_server_surface [rhel-6.9.z]

1425939 - CVE-2017-2633 Qemu: VNC: memory corruption due to unchecked resolution limit

1430056 - CVE-2016-9603 Qemu: cirrus: heap buffer overflow via vnc connection

1437060 - Fails to build in brew

1443441 - CVE-2017-7718 Qemu: display: cirrus: OOB read access issue

1444371 - CVE-2017-7980 Qemu: display: cirrus: OOB r/w access issues in bitblt routines

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 6):

 

Source:

qemu-kvm-0.12.1.2-2.503.el6_9.3.src.rpm

 

i386:

qemu-guest-agent-0.12.1.2-2.503.el6_9.3.i686.rpm

qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.3.i686.rpm

 

x86_64:

qemu-guest-agent-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-img-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-kvm-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-kvm-tools-0.12.1.2-2.503.el6_9.3.x86_64.rpm

 

Red Hat Enterprise Linux HPC Node (v. 6):

 

Source:

qemu-kvm-0.12.1.2-2.503.el6_9.3.src.rpm

 

x86_64:

qemu-guest-agent-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-img-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-kvm-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-kvm-tools-0.12.1.2-2.503.el6_9.3.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 6):

 

Source:

qemu-kvm-0.12.1.2-2.503.el6_9.3.src.rpm

 

i386:

qemu-guest-agent-0.12.1.2-2.503.el6_9.3.i686.rpm

qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.3.i686.rpm

 

ppc64:

qemu-guest-agent-0.12.1.2-2.503.el6_9.3.ppc64.rpm

qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.3.ppc64.rpm

 

x86_64:

qemu-guest-agent-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-img-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-kvm-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-kvm-tools-0.12.1.2-2.503.el6_9.3.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 6):

 

Source:

qemu-kvm-0.12.1.2-2.503.el6_9.3.src.rpm

 

i386:

qemu-guest-agent-0.12.1.2-2.503.el6_9.3.i686.rpm

qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.3.i686.rpm

 

x86_64:

qemu-guest-agent-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-img-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-kvm-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.3.x86_64.rpm

qemu-kvm-tools-0.12.1.2-2.503.el6_9.3.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-2016-9603

https://access.redhat.com/security/cve/CVE-2017-2633

https://access.redhat.com/security/cve/CVE-2017-7718

https://access.redhat.com/security/cve/CVE-2017-7980

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

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2017 Red Hat, Inc.

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