[RHSA-2017:0334-01] Important: qemu-kvm-rhev security update

[news 28]

-----BEGIN PGP SIGNED MESSAGE-----

Hash: SHA1

 

=====================================================================

Red Hat Security Advisory

 

Synopsis: Important: qemu-kvm-rhev security update

Advisory ID: RHSA-2017:0334-01

Product: Red Hat Enterprise Linux OpenStack Platform

Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0334.html

Issue date: 2017-02-27

CVE Names: CVE-2016-2857 CVE-2017-2615 CVE-2017-2620

=====================================================================

 

1. Summary:

 

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

OpenStack Platform 5.0 (Icehouse) for RHEL 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 OpenStack Platform 5.0 (Icehouse) for RHEL 6 - x86_64

 

3. Description:

 

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

Linux on a variety of architectures. The qemu-kvm-rhev packages provide the

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

environments managed by Red Hat products.

 

Security Fix(es):

 

* Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA emulator

support is vulnerable to an out-of-bounds access issue. It could occur

while copying VGA data via bitblt copy in backward mode. A privileged user

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

DoS or potentially execute arbitrary code on the host with privileges of

QEMU process on the host. (CVE-2017-2615)

 

* Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA Emulator

support is vulnerable to an out-of-bounds access issue. The issue could

occur while copying VGA data in cirrus_bitblt_cputovideo. A privileged user

inside guest could use this flaw to crash the QEMU process OR potentially

execute arbitrary code on host with privileges of the QEMU process.

(CVE-2017-2620)

 

* An out-of-bounds read-access flaw was found in the QEMU emulator built

with IP checksum routines. The flaw could occur when computing a TCP/UDP

packet's checksum, because a QEMU function used the packet's payload length

without checking against the data buffer's size. A user inside a guest

could use this flaw to crash the QEMU process (denial of service).

(CVE-2016-2857)

 

Red Hat would like to thank Wjjzhang (Tencent.com Inc.) and Li Qiang

(360.cn Inc.) for reporting CVE-2017-2615 and Ling Liu (Qihoo 360 Inc.) for

reporting CVE-2016-2857.

 

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/):

 

1296567 - CVE-2016-2857 Qemu: net: out of bounds read in net_checksum_calculate()

1418200 - CVE-2017-2615 Qemu: display: cirrus: oob access while doing bitblt copy backward mode

1420484 - CVE-2017-2620 Qemu: display: cirrus: potential arbitrary code execution via cirrus_bitblt_cputovideo

 

6. Package List:

 

Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6:

 

Source:

qemu-kvm-rhev-0.12.1.2-2.491.el6_8.7.src.rpm

 

x86_64:

qemu-img-rhev-0.12.1.2-2.491.el6_8.7.x86_64.rpm

qemu-kvm-rhev-0.12.1.2-2.491.el6_8.7.x86_64.rpm

qemu-kvm-rhev-debuginfo-0.12.1.2-2.491.el6_8.7.x86_64.rpm

qemu-kvm-rhev-tools-0.12.1.2-2.491.el6_8.7.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-2016-2857

https://access.redhat.com/security/cve/CVE-2017-2615

https://access.redhat.com/security/cve/CVE-2017-2620

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.

-----BEGIN PGP SIGNATURE-----

Version: GnuPG v1

 

iD8DBQFYtLsQXlSAg2UNWIIRAqJOAJ9RC1i361XE0GpXYaghH9A0rdv8RACfYzT2

zYkBZqobcN9NCGpN/iTcWlk=

=TYIX

-----END PGP SIGNATURE-----

 

 

--