This update resolves the "Malformed Web Form Submission" security vulnerability in FrontPage Server Extensions (FPSE) that ship as part of Internet Information Services (IIS) 5.0. FPSE is a set of programs that run on an IIS Web server. Administrators can use FPSE to manage and develop content for a Web site. The component of FPSE that provides support for the processing of Web forms may process malformed submissions incorrectly. If a malicious user creates a specially malformed Web form and submits it to an affected server, the IIS service could fail. If this occurs, the IIS service automatically restarts, but any Web sessions that are in progress at the time of an attack are lost. Download now to prevent a malicious user from disrupting the operation of your Web server.

For more information on this vulnerability, please read Microsoft Security Bulletin MS00-100. (This site is in English.)

1. Click Start, point to Settings, and then click Control Panel.
2. Double-click Add/Remove Programs.
3. Select Windows 2000 Hotfix (Pre-SP2) [See Q280322 for more information] and click Change/Remove to uninstall.