The L3 agent in OpenStack Neutron 2014.2.x before 2014.2.2, when using radvd 2.0+, allows remote authenticated users to cause a denial of service (blocked router update processing) by creating eight routers and assigning an ipv6 non-provider subnet to each.
https://bugzilla.redhat.com/show_bug.cgi?id=1169408
https://bugs.launchpad.net/neutron/+bug/1399172
https://bugs.launchpad.net/neutron/+bug/1398779
http://www.securityfocus.com/bid/71961
http://lists.openstack.org/pipermail/openstack-announce/2015-January/000320.html