Jeremy Stanley of the OpenStack Project reports:
Steven Hardy from Red Hat reported a vulnerability in Heat's default
API policy enforcement. By calling the CreateStack or UpdateStack
methods, an in-instance user may be able to create or update a stack
in violation of the default policy. Only setups using Heat's
cloudformation-compatible API are affected.
Acknowledgements:
Red Hat would like to thank Jeremy Stanley of the OpenStack Project for reporting this issue. Upstream acknowledges Steven Hardy of Red Hat as the original reporter.