Rocket Software Unidata udadmin_server Authentication Bypass

This module exploits an authentication bypass vulnerability in the
Linux version of udadmin_server, which is an RPC service that comes
with the Rocket Software UniData server. This affects versions of
UniData prior to 8.2.4 build 3003.

This service typically runs as root. It accepts a username of
":local:" and a password in the form of "::",
where username and uid must be a valid account, but gid can be
anything except 0.

This exploit takes advantage of this login account to authenticate
as a chosen user and run an arbitrary command (using the built-in
OsCommand message).