John C. Welch has written an excellent article on the DHCP vulnerability, explaining why the issue isn't specifically a Mac OS X security hole, and, indeed, that it exists already on the PC (which is what I implied in my post a few days ago). John, however, went into considerable detail on the DHCP side of things.

So, if, as a Mac owner, you are faced with someone crowing over this vulnerability, I suggest you point them at John's article and let them digest it in full. You could also point them at mine at the same time, which explains why Mac OS X is indeed, as we Mac users have claimed all along, inherently more secure than Windows.