A security issue has been identified in Microsoft Windows that could allow an attacker to see information in your computer?s memory over a network. This vulnerability involves one of the NetBIOS over TCP/IP (NetBT) services, the NetBIOS Name Server (NBNS). With this service, you can find a computer's IP address by using its NetBIOS name, and vice versa. You can help protect your computer by installing this update from Microsoft. After you install this item, you may have to restart your computer. The information in this article applies to:

Microsoft Windows Server 2003, Standard Edition Microsoft Windows Server 2003, Enterprise Edition Microsoft Windows Server 2003, Datacenter Edition Microsoft Windows Server 2003, 64-Bit Datacenter Edition Microsoft Windows Server 2003, 64-Bit Enterprise Edition Microsoft Windows Server 2003, Web Edition Microsoft Windows XP Professional Microsoft Windows XP Home Edition Microsoft Windows XP Media Center Edition Microsoft Windows XP Tablet PC Edition Microsoft Windows XP 64-Bit Edition Version 2002 Microsoft Windows XP 64-Bit Edition Version 2003 Microsoft Windows 2000 Advanced Server Microsoft Windows 2000 Professional Microsoft Windows 2000 Server Microsoft Windows 2000 Datacenter Server Microsoft Windows NT Server 4.0 Microsoft Windows NT Server 4.0 Terminal Server Edition

MS03-034: Flaw in NetBIOS Could Lead to Information Disclosure