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Red Hat Security Advisory
Synopsis: Important: openstack-neutron security update
Advisory ID: RHSA-2017:2448-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://access.redhat.com/errata/RHSA-2017:2448
Issue date: 2017-08-08
CVE Names: CVE-2017-7543
An update for openstack-neutron is now available for Red Hat OpenStack
Platform 10.0 (Newton).
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 OpenStack Platform 10.0 - noarch
OpenStack Networking (neutron) is a pluggable, scalable, and API-driven
system that provisions networking services to virtual machines. Its main
function is to manage connectivity to and from virtual machines.
* A race-condition flaw was discovered in openstack-neutron where,
following a minor overcloud update, neutron security groups were disabled.
Specifically, the following were reset to 0:
net.bridge.bridge-nf-call-ip6tables and net.bridge.bridge-nf-call-iptables.
The race was only triggered by an update, at which point an attacker could
access exposed tenant VMs and network resources. (CVE-2017-7543)
This issue was discovered by Paul Needle (Red Hat).
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
5. Bugs fixed (https://bugzilla.redhat.com/):
1473792 - CVE-2017-7543 openstack-neutron: iptables not active after update
6. Package List:
Red Hat OpenStack Platform 10.0:
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <secal...@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2017 Red Hat, Inc.
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