Microsoft KB Archive/214685

= XFOR: CDONTS Not Thread-Safe, Crashes Under Stress =

Article ID: 214685

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q214685





SYMPTOMS
The Collaboration Data Objects for Windows NT Server (CDONTS) Send Mail function is not thread-safe.



CAUSE
CDONTS initializes the RTF/HTML converter each time it is used. This initialization is not thread-safe, and is not protected with a critical section. This permits a race condition where one thread can shut down the converter while another thread is still using it, causing memory corruption, asserts, and failures (crashes).



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:


 * http://www.microsoft.com/windows/servicepacks/ -or-


 * 152734 how to obtain the latest windows nt 4.0 service pack

For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://support.microsoft.com/directory/overview.asp



STATUS
Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Windows NT version 4.0 Service Pack 5.

Additional query words: crash hang GPF

Keywords: kbbug kbfix KB214685

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