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Microsoft FrontPage Server Extensions Remote Debug Buffer Overrun Vulnerability

Risk

High

Date Discovered

November 11, 2003

Description

Microsoft FrontPage Server Extensions are prone to a remotely exploitable buffer overrun vulnerability that is exposed via remote debugging functionality. It is possible to trigger this condition with a chunked-encoded HTTP POST request. This could be exploited to execute arbitrary code on a vulnerable system with Local System privileges.

Technologies Affected

  • Microsoft FrontPage Server Extensions 2000
  • Microsoft FrontPage Server Extensions 2002
  • Microsoft SharePoint Team Services 2002
  • Microsoft Windows 2000 Advanced Server SP2
  • Microsoft Windows 2000 Advanced Server SP3
  • Microsoft Windows 2000 Datacenter Server SP2
  • Microsoft Windows 2000 Datacenter Server SP3
  • Microsoft Windows 2000 Professional SP2
  • Microsoft Windows 2000 Professional SP3
  • Microsoft Windows 2000 Server SP2
  • Microsoft Windows 2000 Server SP3
  • Microsoft Windows XP 64-bit Edition SP1
  • Microsoft Windows XP Home SP1
  • Microsoft Windows XP Professional SP1

Recommendations

Block external access at the network boundary, unless external parties require service.

If the server is not intended to be accessed by external systems, use network access controls to restrict access to all but internal or trusted networks and hosts only. This will reduce exposure to this and other vulnerabilities.

Disable any services that are not needed.

Disable FrontPage Server Extensions if they are not explicitly required. This will eliminate exposure to latent vulnerabilities in the service.
Microsoft has released updates to address this issue. It should be noted that the fix entitled "Security Update for Microsoft FrontPage Server Extensions 2000" is not yet available for download at the time of writing.

Credits

Discovery is credited to Brett Moore.
Copyright © Symantec Corporation.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from secure@symantec.com.

Disclaimer
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.
Symantec, Symantec products, Symantec Security Response, and secure@symantec.com are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners.

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