A lack of access control was found in the message queues maintained by Satellite's QPID broker and used by katello-agent in versions before Satellite 6.2, Satellite 6.1 optional and Satellite Capsule 6.1. A malicious user authenticated to a host registered to Satellite (or Capsule) can use this flaw to access QMF methods to any host also registered to Satellite (or Capsule) and execute privileged commands.