The (1) EC2 and (2) OS APIs in OpenStack Compute (Nova) Folsom (2012.2), Essex (2012.1), and Diablo (2011.3) do not properly check the protocol when security groups are created and the network protocol is not specified entirely in lowercase, which allows remote attackers to bypass intended access restrictions.
https://review.openstack.org/#/c/8239/
https://lists.launchpad.net/openstack/msg12883.html
https://github.com/openstack/nova/commit/ff06c7c885dc94ed7c828e8cdbb8b5d850a7e654
https://github.com/openstack/nova/commit/9f9e9da777161426a6f8cb4314b78e09beac2978
https://exchange.xforce.ibmcloud.com/vulnerabilities/76110
https://euvd.enisa.europa.eu/vulnerability/EUVD-2012-0020
https://bugs.launchpad.net/nova/+bug/985184
http://www.ubuntu.com/usn/USN-1466-1