Yeah I tested it too...against a Windows Server 2003 and it took the CPU to 98-100% and basically made the box unusable. I also tested it against a Windows XP SP2 box and found it didn't spike the CPU but did cause the box to be unstable and had to reboot to recover.

The CPU spiking on the 2003 box only spiked during the attack...once it was done the CPU went back to normal.

What's amazing is that this type of attack was around in the late 1990's but the vuln went away because OS's were fixed...where in the hell was M$ when they tested these new OS's against OLD attacks. And to find that XP SP2, which was specifically developed with security in mind, is vulnerable....unbelievable.

I'm amazed.