Steven Hardy reports: Currently we don't set the NeutronMetadataProxySharedSecret, (which according to the description in the neutron docs exists to prevent spoofing) - thus is remains at it's bad default value of "unset". I assume this has the potential for security impact given that if it's predictable I guess spoofing metadata requests then becomes possible, but not being a Neutron expert I'm not sure of how serious an issue this may be.
Acknowledgements: This issue was discovered by Steven Hardy of Red Hat.
Upstream: https://bugs.launchpad.net/tripleo/+bug/1516027
This issue has been addressed in the following products: OpenStack 7.0 Director/Manager for RHEL 7 Via RHSA-2015:2650 https://access.redhat.com/errata/RHSA-2015:2650