Server Host Computer Destroyers

My community shut down the server because there is something someone found that can destroy the server host’s computer. I want to know if this is true and how to stop it. The Host said hes not pulling it back up until the thing is patched. So how do I prevent it?

Destroy? Not exactly.
http://www.facepunch.com/showthread.php?t=856379 is probably what he’s talking about