[RHSA-2016:1756-01] Moderate: qemu-kvm-rhev security and bug fix update

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Red Hat Security Advisory

 

Synopsis: Moderate: qemu-kvm-rhev security and bug fix update

Advisory ID: RHSA-2016:1756-01

Product: Red Hat Enterprise Linux OpenStack Platform

Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-1756.html

Issue date: 2016-08-24

CVE Names: CVE-2016-5126 CVE-2016-5403

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1. Summary:

 

An update for qemu-kvm-rhev is now available for Red Hat OpenStack Platform

8.0 (Liberty).

 

Red Hat Product Security has rated this update as having a security impact

of Moderate. 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 OpenStack Platform 8.0 (Liberty) - x86_64

 

3. Description:

 

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-based buffer overflow issue. The flaw

could occur while processing iSCSI asynchronous I/O ioctl(2) calls. A user

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

in denial of service, or potentially leverage it to execute arbitrary code

with QEMU-process privileges 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 results in 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.

 

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/):

 

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

 

6. Package List:

 

Red Hat OpenStack Platform 8.0 (Liberty):

 

Source:

qemu-kvm-rhev-2.3.0-31.el7_2.21.src.rpm

 

x86_64:

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/

 

7. 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

 

8. Contact:

 

The Red Hat security contact is . More contact

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

 

Copyright 2016 Red Hat, Inc.

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