Imes patches themselves create new problems as they are fixing old ones. It is well-known in the software reliability group that testing and fixing sometimes scale back reliability, rather than enhance it. So there are several ways in which the continual bug-patching strategy to security may very well lead to a much less safe product than you started with. Having found an appropriate target machine, the worm would use considered one of these three strategies to ship a bootstrap loader to the goal machine.