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Red Hat OpenStack 9.0: RHSA-2017:0329-01 Critical DoS for qemu-kvm-rhev

red hat
Calendar Grey February 27, 2017
Scroller Redhat
Crucial security patch released for qemu-kvm-rhev in Red Hat OpenStack Platform 9.0, focusing on severe vulnerabilities.
An update for qemu-kvm-rhev is now available for Red Hat OpenStack Platform 9.0 (Mitaka)

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.

Summary

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)
Red Hat would like to thank Wjjzhang (Tencent.com Inc.) and Li Qiang (360.cn Inc.) for reporting CVE-2017-2615.

Topics%20covered

Topics Covered

security advisory DoS critical threat important update Red Hat OpenStack qemu-kvm-rhev

References

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

Package List

Red Hat OpenStack Platform 9.0:
Source: qemu-kvm-rhev-2.6.0-28.el7_3.6.src.rpm
x86_64: qemu-img-rhev-2.6.0-28.el7_3.6.x86_64.rpm qemu-kvm-common-rhev-2.6.0-28.el7_3.6.x86_64.rpm qemu-kvm-rhev-2.6.0-28.el7_3.6.x86_64.rpm qemu-kvm-rhev-debuginfo-2.6.0-28.el7_3.6.x86_64.rpm qemu-kvm-tools-rhev-2.6.0-28.el7_3.6.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/


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2017:0329-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://access.redhat.com/errata/RHSA-2017:0329.html
Issue date: 2017-02-27

Topic

An update for qemu-kvm-rhev is now available for Red Hat OpenStack Platform9.0 (Mitaka).Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory DoS critical threat important update Red Hat OpenStack qemu-kvm-rhev

Relevant Releases Architectures

Red Hat OpenStack Platform 9.0 - x86_64

Bugs Fixed

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

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