OpenStack Glance 2014.2.x through 2014.2.1, 2014.1.3, and earlier allows remote authenticated users to bypass the storage quota and cause a denial of service (disk consumption) by deleting an image in the saving state.
rhn.redhat.com/errata/RHSA-2015-0644.html
rhn.redhat.com/errata/RHSA-2015-0837.html
rhn.redhat.com/errata/RHSA-2015-0838.html
secunia.com/advisories/62165
www.openwall.com/lists/oss-security/2015/01/18/4
www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
bugs.launchpad.net/glance/+bug/1383973
bugs.launchpad.net/glance/+bug/1398830
security.openstack.org/ossa/OSSA-2015-003.html