A flaw was found in Red Hat Ceph before 0.94.9-8. The way Ceph Object Gateway handles POST object requests permits an authenticated attacker to launch a denial of service attack by sending null or specially crafted POST object requests.
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-8626
http://www.securityfocus.com/bid/94488
http://tracker.ceph.com/issues/17635
http://rhn.redhat.com/errata/RHSA-2016-2848.html
http://rhn.redhat.com/errata/RHSA-2016-2847.html