OpenStack Keystone Essex before 2012.1.2 and Folsom before folsom-3 does not properly handle authorization tokens for disabled tenants, which allows remote authenticated users to access the tenant's resources by requesting a token for the tenant.
https://lists.launchpad.net/openstack/msg17035.html
https://github.com/openstack/keystone/commit/5373601bbdda10f879c08af1698852142b75f8d5
https://github.com/openstack/keystone/commit/4ebfdfaf23c6da8e3c182bf3ec2cb2b7132ef685
https://exchange.xforce.ibmcloud.com/vulnerabilities/78947
https://bugzilla.redhat.com/show_bug.cgi?id=861180
http://www.securityfocus.com/bid/55716