Red Hat Security Advisory 2015-0839-01 – OpenStack Dashboard provides administrators and users a graphical interface to access, provision and automate cloud-based resources. The dashboard allows cloud administrators to get an overall view of the size and state of the cloud and it provides end-users a self-service portal to provision their own resources within the limits set by administrators. A denial of service flaw was found in the OpenStack Dashboard when using the db or memcached session engine. An attacker could make repeated requests to the login page, which would result in a large number of unwanted backend session entries, possibly leading to a denial of service.