Internet Worm Alert: Sasser

The latest worm to hit the internet, Sasser, is dangerous because you don't have to click on anything or open an email attachment to get it. It spreads on its own, sending copies of itself over the internet to vulnerable machines running Windows XP or Windows 2000. It was first reported this Saturday.

Infected computers will crash or reboot.

Fortunately, Windows users who've kept their software up to date are in the clear. Microsoft released a fix for this vulnerability back on April 13.

If you're not sure whether you're up to date, all the information you need is on Microsoft's Sasser incident page; there's even a test you can run to quickly scan for the worm on your machine.

And if you haven't done so already, experts advise you to install a firewall. There's one included with Windows XP, and others available online. Zone Labs even offers a free version of its Zone Alarm firewall.

Reported by: Charles Gray, cgray@wtoc.com