http://www.microsoft.com/technet/security/advisory/899480.mspx
Changes made during the development of Windows XP Service Pack 2, Windows Server 2003 Service Pack 1, and the MS05-019 security update eliminated this vulnerability. If you have installed any of these updates, these updates already help protect you from this vulnerability and no additional action is required.Mitigating Factors:
• Customers who have installed Windows XP Service Pack 2, Windows Server 2003 Service Pack 1, or the MS05-019 security update are not affected by this vulnerability.
MS05-019 security update is Knowledge Base item KB893066 (this is what you will see on your systems if you have installed the MS05-019 security update).