Microsoft KB Archive/272743

= HTML E-mail Link Transmits User Name and Password to Unauthorized Server =

Article ID: 272743

Article Last Modified on 2/21/2007

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional Edition

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This article was previously published under Q272743



SYMPTOMS
When you click a link in a Hypertext Markup Language (HTML) document, it may be possible for a malicious user to use that link to initiate a Microsoft Windows NT LAN Manager (NTLM) challenge/response authentication process to a remote Telnet server and transmit your NTLM credentials (you user name and password) without notification.



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack

NOTE: On September 14, 2000, Microsoft released the original version of this patch. On September 21, 2000, a new version of the patch was released. Microsoft recommends that all customers, including those who applied the original version of the patch, apply the new version.

The following files are available for download from the Microsoft Download Center:

English Language Version

Arabic Language Version

Chinese (Simplified) Language Version

Chinese (Traditional) Language Version

Czech Language Version

Danish Language Version

Dutch Language Version

Finnish Language Version

French Language Version

German Language Version

Greek Language Version

Hebrew Language Version

Hungarian Language Version

Italian Language Version

Japanese Language Version

Japanese NEC Language Version

Korean Language Version

Norwegian Language Version

Polish Language Version

Portuguese (Brazilian) Language Version

Portuguese Language Version

Russian Language Version

Spanish Language Version

Swedish Language Version

Turkish Language Version

For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to Obtain Microsoft Support Files from Online Services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file. The English version of this fix should have the following file attributes or later:   Date        Time    Size    Version      File name ---  09/19/2000  01:34p  80,144  5.0.33666.1  Telnet.exe



WORKAROUND
Q299553_W2K_SP3_x86_en.EXE



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 2.



MORE INFORMATION
For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:

249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes

For related information about this problem, please visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/bulletin/fq00-067.mspx

For additional security-related information about Microsoft products, please visit the following Microsoft Web site:

http://www.microsoft.com/technet/security

Additional query words: url uniform universal resource locator

Keywords: kbbug kbfix kbgraphxlinkcritical kbnetwork kbwin2000presp2fix KB272743

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