Denial of Service Attack Causes Windows NT Systems to Restart

 Last reviewed: February 13, 1998
Article ID: Q180963
The information in this article applies to:
  • Microsoft Windows NT Server version 4.0

SYMPTOMS

During the processing of a Server Message Block (SMB) logon request, memory corruption occurs causing one of the following errors:

  • STOP 0x0000000A
  • STOP 0x00000050

The result is for the system to restart or stop responding (hang).

Note: The STOP errors will vary from case to case.

CAUSE

The size of data to follow is contained in the SMB logon request. When the size specified in the request does not match the size actually present, the corruption occurs.

RESOLUTION

To resolve this problem, obtain the following fix or wait for the next Windows NT 4.0 service pack.

This fix should have the following time stamp: 

   01/07/98  07:59p               229,840 Srv.sys (Intel)
   01/07/98  07:56p               466,384 Srv.sys (Alpha)
This hotfix has been posted to the following Internet location: 

   ftp://ftp.microsoft.com/bussys/winnt/winnt-public/fixes/usa/NT40/
   hotfixes-postSP3/srv-fix
NOTE: The above link is one path; it has been wrapped for readability.

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 4.0. A supported fix is now available, but has not been fully regression tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information. 

Keywords          : kbbug4.00 kbfix4.00 NTSrv ntstop
Version           : WinNT:4.0
Platform          : winnt
Issue type        : kbbug
Solution Type     : kbfix

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Last reviewed: February 13, 1998
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