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Microsoft Security Bulletin MS02-062

Cumulative Patch for Internet Information Service (Q327696)

Originally posted: October 30, 2002


Who should read this bulletin:
Customers hosting web servers using Microsoft® Windows NT® 4.0, Windows® 2000, or Windows XP.

Impact of vulnerability:
Four vulnerabilities, the most serious of which could enable applications on a server to gain system-level privileges.

Maximum Severity Rating:

Customers using IIS 4.0, 5.0 or 5.1 should consider applying the patch

Affected Software:

  • Microsoft Internet Information Server 4.0
  • Microsoft Internet Information Services 5.0
  • Microsoft Internet Information Services 5.1

General Information

Technical details

Frequently asked questions

Patch availability

Other information:


Microsoft thanks the following people for reporting this issue to us and working with us to protect customers:

  • Li0n of A3 Security Consulting Co., Ltd. ( for reporting the Out of process privilege elevation vulnerability.
  • Mark Litchfield of Next Generation Security Software Ltd. ( for reporting the WebDAV denial of service vulnerability.
  • Tomoki Sanaki of International Network Security, Inc., for reporting the script source access vulnerability.
  • Arai Yuu of LAC ( for reporting the cross-site scripting vulnerability in IIS administrative pages.
  • Luciano Martins of Deloitte & Touche Argentina ( for recommending the change in the socket backlog list purge rate.


  • Microsoft Knowledge Base article Q327696 discusses this issue and will be available approximately 24 hours after the release of this bulletin. Knowledge Base articles can be found on the Microsoft Online Support web site.
  • Technical support is available from Microsoft Product Support Services. There is no charge for support calls associated with security patches.

Security Resources: The Microsoft TechNet Security Web Site provides additional information about security in Microsoft products.


The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.


  • V1.0 (October 23, 2002): Bulletin Created.
  • V1.1 (November 01, 2002): Bulletin updated to update Acknowledgments section.