Microsoft KB Archive/222521

= Media Player May Cause an Access Violation During Authentication =

Article ID: 222521

Article Last Modified on 10/6/2005

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APPLIES TO


 * Microsoft Windows Media Player 5.2
 * Microsoft Windows Media Player 6.0

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This article was previously published under Q222521



SYMPTOMS
The Microsoft Windows Media Player may cause an Access Violation error during authentication when you hit a secure URL using http:// instead of https://.



CAUSE
While the Windows Media Player has its authentication dialog displayed, the Web server unexpectedly sends more data down the same TCP connection. The data is sent through a custom ISAPI filter. This data cause the Windows Media Player to free up memory used for the authentication data structures that the dialog box updates. Therefore, as soon as the dialog box ends, the computer stops responding.



RESOLUTION
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Microsoft Windows Media Player that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

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

  Date      Time       Size     File name     Platform 08/26/98 11:46a         923  Eula.txt      Alpha 04/05/99 03:20p     481,552  Strmdll.dll   Alpha 08/26/98 11:03p      79,120  Update.exe    Alpha 03/12/99 07:33p       1,866  Update.inf    Alpha 08/26/98 11:46a         923  Eula.txt      i386 04/05/99 03:18p     236,960  Strmdll.dll   i386 08/26/98 10:46p      62,000  Update.exe    i386 03/12/99 07:33p       1,866  Update.inf    i386



WORKAROUND
To work around this problem, configure the Web server to not send the data when the client is the Windows Media Player. Implementing this workaround requires custom code in an Isapi filter.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.



MORE INFORMATION
Additional query words: wmp wmptop

Keywords: kbbug kbfix kbqfe kbhotfixserver KB222521

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