Dangling symlinks
  If you ran the following code
    open FH, ">dangling" or die;
  The actual target of 'dangling' (nada) would be created, as long as the invoking user can do so.
  Create .rhosts / .shosts files for normal users.
  Allow passwordless login to their account.
  Create /etc/nologin as root.
  Deny everyone the ability to log in.

Copyright 2003, Bri Hatch of Onsight, Inc.

Presented at SPUG, 2003.

Presentation created using vim and MagicPoint.