Microsoft KB Archive/889388

= FIX: An access violation occurs in the digest!CList::GetNext method when you run two or more WinHTTP 5.1 applications at the same time that use Digest Authentication in Windows Server 2003 =

Article ID: 889388

Article Last Modified on 11/15/2007

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APPLIES TO


 * Microsoft Windows HTTP Services 5.1
 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Web Edition

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SYMPTOMS
An access violation (AV) occurs in the digest!CList::GetNext method when you run two or more Microsoft Windows HTTP Services (WinHTTP) 5.1 applications at the same time that use Digest Authentication. This problem occurs in Microsoft Windows Server 2003.



CAUSE
This problem occurs when multiple processes for the WinHTTP 5.1 applications try to access a data structure at the same time in the Digest Libraries. When this problem occurs, the WinHTTP 5.1 applications go out of synchronization. You experience an access violation.



RESOLUTION
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
No prerequisites are required.

Restart requirement
You have to restart your computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.   Date         Time   Version        Size   File name 02-Dec-2004 21:03  6.0.3790.239  59,904  Digest.dll



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



Stack information
The top of the stack looks similar to the following: # ChildEBP RetAddr 00 05adbce8 73774a91 digest!CList::GetNext 01 05adbd10 73774be6 digest!CCredCache::FlushCreds 02 05adbd38 73772b53 digest!CCredCache::LogOffFromCache 03 05adbd40 76f518e1 digest!FreeCredentialsHandle 04 05adbd58 70c8b84e secur32!FreeCredentialsHandle 05 05adbd64 70c8bea1 winhttp!DIGEST_CTX::~DIGEST_CTX 06 05adbd6c 70c8b717 winhttp!DIGEST_CTX::`scalar deleting destructor' 07 05adbd84 70c8454c winhttp!AuthOnResponse 08 05adbda4 70c8498e winhttp!HTTP_REQUEST_HANDLE_OBJECT::HttpSendRequest_Start 09 05adbdac 70c77fb4 winhttp!CFsm_HttpSendRequest::RunSM 0a 05adbdc4 70c7814f winhttp!CFsm::Run 0b 05adbe10 70c6faa4 winhttp!StartFsmChain 0c 05adbe54 70c6ff00 winhttp!HttpWrapSendRequest For additional information about Windows HTTP Services (WinHTTP), visit the following Microsoft Developer Network (MSDN) Web site:

http://msdn2.microsoft.com/en-us/library/aa384273.aspx

For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional query words: W3K WinHTTP AV

Keywords: kbtshoot kbprb kbqfe kbhotfixserver KB889388

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