OpenStack Keystone, as used in OpenStack Folsom before folsom-rc1 and OpenStack Essex (2012.1), allows remote attackers to add an arbitrary user to an arbitrary tenant via a request to update the user's default tenant to the administrative API. NOTE: this identifier was originally incorrectly assigned to an open redirect issue, but the correct identifier for that issue is CVE-2012-3540.
https://lists.launchpad.net/openstack/msg16282.html
https://github.com/openstack/keystone/commit/c13d0ba606f7b2bdc609a7f388334e5efec3f3aa
https://github.com/openstack/keystone/commit/5438d3b5a219d7c8fa67e66e538d325a61617155
https://bugs.launchpad.net/keystone/+bug/1040626
http://www.ubuntu.com/usn/USN-1552-1
http://www.securityfocus.com/bid/55326
http://www.openwall.com/lists/oss-security/2012/08/30/6