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Red Hat: RHSA-2016-1652-01 Moderate: Qemu-Kvm-Rhev DoS Risk

red hat
Calendar Grey August 23, 2016
Dist Redhat Esm H88
Significant patch released for qemu-kvm-rhev on RHEL 6; addresses infinite memory consumption vulnerability that could result in denial-of-service threats.
An update for qemu-kvm-rhev is now available for Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6

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 AMD64 and Intel 64 systems. The qemu-kvm-rhev package provides the user-space component for running virtual machines using KVM in environments managed by Red Hat Enterprise Virtualization Manager.
Security Fix(es):
* Quick emulator(Qemu) built with the virtio framework is vulnerable to an unbounded memory allocation issue. It was found that a malicious guest user could submit more requests than the virtqueue size permits. Processing a request allocates a VirtQueueElement and therefore causes unbounded memory allocation on the host controlled by the guest. (CVE-2016-5403)
Red Hat would like to thank hongzhenhao (Marvel Team) for reporting this issue.

Topics%20covered

Topics Covered

security advisory Red Hat DoS moderate severity memory allocation

References

https://access.redhat.com/security/cve/CVE-2016-5403 https://access.redhat.com/security/updates/classification/#moderate

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_8.3.src.rpm
x86_64: qemu-img-rhev-0.12.1.2-2.491.el6_8.3.x86_64.rpm qemu-kvm-rhev-0.12.1.2-2.491.el6_8.3.x86_64.rpm qemu-kvm-rhev-debuginfo-0.12.1.2-2.491.el6_8.3.x86_64.rpm qemu-kvm-rhev-tools-0.12.1.2-2.491.el6_8.3.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/


Advisory ID: RHSA-2016:1652-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://access.redhat.com/errata/RHSA-2016:1652.html
Issue date: 2016-08-23

Topic

An update for qemu-kvm-rhev is now available for Red Hat Enterprise LinuxOpenStack Platform 5.0 (Icehouse) for RHEL 6.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat DoS moderate severity memory allocation

Relevant Releases Architectures

Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6 - x86_64

Bugs Fixed

1358359 - CVE-2016-5403 Qemu: virtio: unbounded memory allocation on host via guest leading to DoS

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