Security Alert for Windows XP Users
Microsoft is warning Windows XP and Server 2003 users that exploit code has been posted online showing attackers how to break into these operating systems remotely via a newly-discovered security flaw.
The security flaw has to do with a weakness in the way the Windows Help and Support Center processes links. Both Windows XP and Server 2003 retrieve help and support information from a fixed set of Web pages that are included on a whitelist maintained by Windows. But Google security research Tavis Ormandy discovered that it was possible to add URLs to that whitelist.