Visit our newest sister site!
Hundreds of free aircraft flight manuals
Civilian • Historical • Military • Declassified • FREE!

TUCoPS :: Windows Net Apps :: ciack065.htm

Microsoft "Specialized Header" Vulnerability
Microsoft "Specialized Header" Vulnerability Privacy and Legal Notice


K-065: Microsoft "Specialized Header" Vulnerability

August 15, 2000 23:00 GMT
PROBLEM:       Microsoft has identified a vulnerability that under certain
               conditions may cause a web server to send source code of
               certain types of web files to a visiting user.
PLATFORM:      All platforms running Microsoft Internet Information Server
               (IIS) 5.0
DAMAGE:        If a user creates a specialized header and appends one of
               several particular characters at the end of the request, IIS
               will locate the correct file but not recognize it as a file
               that needs to be processed by a scripting engine. Instead, it
               will simply send the file to the browser.
SOLUTION:      Install the patch indicated below. For Windows 2000 install
               Service Pack 1.

VULNERABILITY The risk is LOW. If normal security recommendations regarding ASSESSMENT: .ASP files has been followed, there will be no sensitive information contained in the source code.
[Start of Microsoft Security Bulletin] Microsoft Security Bulletin (MS00-058) -------------------------------------- Patch Available for "Specialized Header" Vulnerability Originally posted: August 14, 2000 Summary ======= Microsoft has released a patch that eliminates a security vulnerability in Internet Information Server that ships with Microsoft(r) Windows 2000. Under certain conditions, the vulnerability could cause a web server to send the source code of certain types of web files to a visiting user. Frequently asked questions regarding this vulnerability and the patch can be found at Issue ===== If an IIS server receives a file request that contains a specialized header as well as one of several particular characters at the end, the expected ISAPI extension processing may not occur. The result is that the source code of the file would be sent to the browser. It is important to note that normal security recommendations militate strongly against ever including sensitive information in .ASP files and, if these recommendations have been followed, there would be no sensitive information to compromise. The specialized header at issue here cannot be created via a standard Internet browser, so the request would need to be created by an alternate method. Affected Software Versions ========================== - Microsoft Internet Information Server 5.0 Patch Availability ================== - Note: This vulnerability is eliminated by installing Windows 2000 Service Pack 1 We recommend that customers apply SP1 as the preferred option for eliminating this vulnerability, as it has been fully regression tested and includes fixes for additional issues. Note: Additional security patches are available at the Microsoft Download Center More Information ================ Please see the following references for more information related to this issue. - Frequently Asked Questions: Microsoft Security Bulletin MS00-058, - Microsoft Knowledge Base article Q256888 discusses this issue and will be available soon. - Microsoft TechNet Security web site, - Obtaining Support on this Issue - This is a fully supported patch. Information on contacting Microsoft Product Support Services is available at Revisions ========= August 14, 2000: Bulletin Created. [End of Microsoft Security Bulletin]

CIAC wishes to acknowledge the contributions of Microsoft for the information contained in this bulletin.

CIAC services are available to DOE, DOE Contractors, and the NIH. CIAC can be contacted at:
    Voice:          +1 925-422-8193 (7 x 24)
    FAX:            +1 925-423-8002
    STU-III:        +1 925-423-2604
    World Wide Web:
                     (same machine -- either one will work)
    Anonymous FTP:
                     (same machine -- either one will work)

This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes.
[Privacy and Legal Notice]

TUCoPS is optimized to look best in Firefox® on a widescreen monitor (1440x900 or better).
Site design & layout copyright © 1986-2015 AOH