OpenStack Compute (Nova) before 2014.1.4 and 2014.2.x before 2014.2.1 allows remote authenticated users to cause a denial of service (CPU consumption) via an IP filter in a list active servers API request.Referenceshttp://www.securityfocus.com/bid/70777http://rhn.redhat.com/errata/RHSA-2015-0844.htmlhttp://rhn.redhat.com/errata/RHSA-2015-0843.htmlhttps://bugs.launchpad.net/nova/+bug/1358583http://lists.openstack.org/pipermail/openstack-announce/2014-October/000301.html
