A flaw was found in the way Ceph Object Gateway would process cross-origin HTTP requests if the CORS policy was set to allow origin on a bucket. A remote unauthenticated attacker could use this flaw to cause denial of service by sending a specially-crafted cross-origin HTTP request. Ceph branches 1.3.x and 2.x are affected.

Ceph monitors crash when an empty or malformed prefix is sent to moncommand by rados.py. Authenticated attacker can crash ceph monitors by sending specially crafted input to moncommand via rados.py.