MS00-077: Denial-of-Service Attack on Port 1720 May Cause a Memory Leak in Conf.exe (299796)

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 Q299796

SYMPTOMS

A port attack on port 1720, which is used by the Microsoft NetMeeting Remote Desktop Sharing (RDS) process, may cause a memory leak. When this occurs, Conf.exe consumes all available memory and 50 percent of the CPU usage.

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

The English version of this fix should have the following file attributes or later:

   Date       Time    Version     Size     File name
   ----------------------------------------------------
   5/24/2001  01:45p  4.4.0.3385  392,976  Callcont.dll

STATUS

Microsoft 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.

MORE INFORMATION

For more information about this vulnerability, see the following Microsoft Web site:

http://www.microsoft.com/technet/security/bulletin/MS00-077.mspx

Modification Type:	Minor	Last Reviewed:	9/26/2005
Keywords:	kbHotfixServer kbQFE kbbug kbfix kbSecurity kbWin2000PreSP3Fix kbWin2000sp3fix KB299796