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Red Hat: RHSA-2016:1654-01 Moderate: qemu-kvm-rhev DoS Fix

red hat
Calendar Grey August 23, 2016
Dist Redhat Esm H88
Canonical has released a significant security patch for nova, tackling urgent vulnerabilities. Make sure to implement the updates without delay.
An update for qemu-kvm-rhev is now available for Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7

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 Block driver for iSCSI images support (virtio-blk) is vulnerable to a heap buffer overflow issue. It could occur while processing iSCSI asynchronous I/O ioctl(2) calls. A user inside guest could use this flaw to crash the Qemu process resulting in DoS or potentially leverage it to execute arbitrary code with privileges of the Qemu process on the host. (CVE-2016-5126)
* 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 CVE-2016-5403.

Topics%20covered

Topics Covered

security advisory moderate DoS Red Hat Enterprise virtualization Red Hat OpenStack qemu-kvm-rhev

References

https://access.redhat.com/security/cve/CVE-2016-5126 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 6.0 (Juno) for RHEL 7:
Source: qemu-kvm-rhev-2.3.0-31.el7_2.21.src.rpm
x86_64: libcacard-devel-rhev-2.3.0-31.el7_2.21.x86_64.rpm libcacard-rhev-2.3.0-31.el7_2.21.x86_64.rpm libcacard-tools-rhev-2.3.0-31.el7_2.21.x86_64.rpm qemu-img-rhev-2.3.0-31.el7_2.21.x86_64.rpm qemu-kvm-common-rhev-2.3.0-31.el7_2.21.x86_64.rpm qemu-kvm-rhev-2.3.0-31.el7_2.21.x86_64.rpm qemu-kvm-rhev-debuginfo-2.3.0-31.el7_2.21.x86_64.rpm qemu-kvm-tools-rhev-2.3.0-31.el7_2.21.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-2016:1654-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://access.redhat.com/errata/RHSA-2016:1654.html
Issue date: 2016-08-23

Topic

An update for qemu-kvm-rhev is now available for Red Hat Enterprise LinuxOpenStack Platform 6.0 (Juno) for RHEL 7.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 moderate DoS Red Hat Enterprise virtualization Red Hat OpenStack qemu-kvm-rhev

Relevant Releases Architectures

Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 - x86_64

Bugs Fixed

1340924 - CVE-2016-5126 Qemu: block: iscsi: buffer overflow in iscsi_aio_ioctl

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

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