GHSA-63FQ-8FP9-VHWQ OpenStack Compute (Nova) Denial of service via a large number of calls to the addFixedIp function

OpenStack Compute Nova Grizzly, Folsom 2012.2, and Essex 2012.1 does not properly implement a quota for fixed IPs, which allows remote authenticated users to cause a denial of service resource exhaustion and failure to spawn new instances via a large number of calls to the addFixedIp function...