Missing Authentication for Critical Function

Summary

Dragonfly is an open source P2P-based file distribution and image acceleration system. Prior to version 2.1.0, The '/api/v1/jobs' and '/preheats' endpoints in Manager web UI are accessible without authentication. Any user with network access to the Manager can create, delete, and modify jobs, and create preheat jobs. An unauthenticated adversary with network access to a Manager web UI uses '/api/v1/jobs' endpoint to create hundreds of useless jobs. The Manager is in a Denial-of-Service (DoS) state, and stops accepting requests from valid administrators.