Here is the technical description of the exploit: link.
Here is the interview with the author of the code that took down the site: link
Escaping is the devil.
When a system is so complex that there are 3 different ways to escape something, you will find that not everyone has the same level of compliance or security.
(as a side note, is it just me, or do the years before all computers became connected as one, The Internets… do those years appear as a blur of darkness? I mean, here is an interview with the guy who took down a site. I barely exerted any effort to achieve this information. In the dark times, this was not possible.)