STA Threads Lose Thread Token

Article translations Article translations
Article ID: 192132 - View products that this article applies to.
This article was previously published under Q192132
This article has been archived. It is offered "as is" and will no longer be updated.
Expand all | Collapse all

SYMPTOMS

If a Single Threaded Apartment (STA) thread sets a thread token on its apartment thread, it may lose this token unexpectedly. As a result, secure calls to open files, databases, and so on, can fail. This behavior is exhibited only by STA servers; MTA servers are unaffected by this problem.

CAUSE

This problem is caused by a bug in the COM/RPC runtime that causes it to incorrectly revert the thread token after a call was dispatched to the STA.

RESOLUTION

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack

STATUS

Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.

MORE INFORMATION

COM server processes may set thread tokens on their threads for various reasons. Secure calls from such threads will use the thread token in the access checks performed by the operating system. If these threads also happen to host STA objects, the token can be lost because of the above bug. Secure calls from the threads will then use the process token for access checks, and this can lead to different results from the first case. The problem usually manifests as unexpected security failures in secure accesses made by such threads.

Properties

Article ID: 192132 - Last Review: October 10, 2013 - Revision: 1.3
APPLIES TO
  • Microsoft Windows NT Server 4.0, Terminal Server Edition
  • Microsoft Windows NT Workstation 4.0 Developer Edition
  • Microsoft Windows NT Server 4.0 Standard Edition
Keywords: 
kbnosurvey kbarchive kbhotfixserver kbqfe kbbug kbfix KB192132

Give Feedback

 

Contact us for more help

Contact us for more help
Connect with Answer Desk for expert help.
Get more support from smallbusiness.support.microsoft.com