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Red Hat Security Advisory 2017-2449-01

Red Hat Security Advisory 2017-2449-01
Posted Aug 8, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2449-01 - OpenStack Networking 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. Security Fix: 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.

tags | advisory
systems | linux, redhat
advisories | CVE-2017-7543
MD5 | dfd2a3aabb744e9565b0b76bc7085782

Red Hat Security Advisory 2017-2449-01

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=====================================================================
Red Hat Security Advisory

Synopsis: Important: openstack-neutron security update
Advisory ID: RHSA-2017:2449-01
Product: Red Hat Enterprise Linux OpenStack Platform
Advisory URL: https://access.redhat.com/errata/RHSA-2017:2449
Issue date: 2017-08-08
CVE Names: CVE-2017-7543
=====================================================================

1. Summary:

An update for openstack-neutron is now available for Red Hat OpenStack
Platform 11.0 (Ocata).

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 11.0 - noarch

3. Description:

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.

Security Fix(es):

* 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).

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

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 11.0:

Source:
openstack-neutron-10.0.2-1.1.el7ost.src.rpm

noarch:
openstack-neutron-10.0.2-1.1.el7ost.noarch.rpm
openstack-neutron-common-10.0.2-1.1.el7ost.noarch.rpm
openstack-neutron-linuxbridge-10.0.2-1.1.el7ost.noarch.rpm
openstack-neutron-macvtap-agent-10.0.2-1.1.el7ost.noarch.rpm
openstack-neutron-metering-agent-10.0.2-1.1.el7ost.noarch.rpm
openstack-neutron-ml2-10.0.2-1.1.el7ost.noarch.rpm
openstack-neutron-openvswitch-10.0.2-1.1.el7ost.noarch.rpm
openstack-neutron-rpc-server-10.0.2-1.1.el7ost.noarch.rpm
openstack-neutron-sriov-nic-agent-10.0.2-1.1.el7ost.noarch.rpm
python-neutron-10.0.2-1.1.el7ost.noarch.rpm
python-neutron-tests-10.0.2-1.1.el7ost.noarch.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-2017-7543
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2017 Red Hat, Inc.
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