MS01-031: Logon Command That Contains a Particular Malformation Causes an Access Violation in the Telnet Service (299553)
The information in this article applies to:
- Microsoft Windows 2000 Server SP1
- Microsoft Windows 2000 Server SP2
- Microsoft Windows 2000 Advanced Server SP1
- Microsoft Windows 2000 Advanced Server SP2
- Microsoft Windows 2000 Professional SP1
- Microsoft Windows 2000 Professional SP2
This article was previously published under Q299553 SYMPTOMS
A denial-of-service vulnerability exists in the Windows 2000 Telnet service that is caused by the manner in which Telnet handles a logon command that contains a particular deformity. If an attacker entered such a command, it would cause the Telnet service to stop working. The administrator could restore normal service by restarting the Telnet session. Mitigating Factors- It would not be necessary to reboot the server to recover from this vulnerability. At worst, the Telnet service would need to be restarted.
- This vulnerability cannot be used to gain additional privileges on the computer; it is a denial-of-service vulnerability only.
RESOLUTIONTo 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
The English version of this fix should have the following file attributes or later:
Date Time Version Size File name
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05/24/2001 04:14p 5.0.33667.1 186,128 Tlntsvr.exe
STATUSMicrosoft has confirmed that this problem may cause a degree of security vulnerability in Microsoft Windows 2000. This problem was first corrected in Windows 2000 Service Pack 3.
| Modification Type: | Minor | Last Reviewed: | 9/26/2005 |
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| Keywords: | kbHotfixServer kbQFE kbbug kbfix kbSecurity kbWin2000PreSP3Fix kbWin2000sp3fix KB299553 |
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