Not really a dumb question. In matters of computer security, it's
far, far better to be safe than sorry.
This vulnerability was addressed with a Hotfix (315000) prior to
the release of Service Pack 1, and the patch was also incorporated
into Service Pack 1.
Microsoft Security Bulletin MS01-059
Unchecked Buffer in Universal Plug and Play Can Lead to System
Compromise for Windows XP
List of Bugs That Are Fixed in Windows XP Service Packs
You can have peace. Or you can have freedom. Don't ever count on
having both at once. -- RAH