PostgreSQL server -- Memory disclosure in certain queries

The PostgreSQL Project reports:

   A purpose-crafted query can read arbitrary bytes of
   server memory. In the default configuration, any
   authenticated database user can complete this attack at
   will. The attack does not require the ability to create
   objects. If server settings include
   max_worker_processes=0, the known versions of this
   attack are infeasible. However, undiscovered variants of
   the attack may be independent of that setting.