Microsoft KB Archive/321006

= XWEB: The Cdohtml.dll File Tries to Parse Attachments That Do Not Exist =

Article ID: 321006

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition
 * Microsoft Exchange Server 5.5 Service Pack 1
 * Microsoft Exchange Server 5.5 Service Pack 2
 * Microsoft Exchange Server 5.5 Service Pack 3
 * Microsoft Exchange Server 5.5 Service Pack 4

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This article was previously published under Q321006





SYMPTOMS
If you use Microsoft Outlook Web Access (OWA) or other programs that use the Cdohtml.dll file, you may receive error messages that mention attachments that do not exist. For example, if you receive a message that was formerly infected with the W32/Badtrans-A virus, and a virus scanner that is based on Messaging Application Programming Interface (MAPI) deleted the attachment, the error message may range from an access violation to the following error message (depending on the level of error handling and the version of Internet Information Services [IIS]):

error 'ASP 0115'

Unexpected error

/exchange/USA/forms/IPM/NOTE/read.asp

A trappable error occurred in an external object. The script cannot continue running.



CAUSE
This problem may occur if Collaboration Data Objects (CDO) tries to locate an attachment that is referenced in a malformed Multipurpose Internet Mail Extensions (MIME) bodypart. If this attachment does not exist, a dereference of a NULL pointer results.



RESOLUTION
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Exchange Server 5.5 service pack 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/contactus/?ws=support

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:

Component: CDO

NOTE: Because of file dependencies, this fix requires Microsoft Exchange Server version 5.5 Service Pack 4.



STATUS
Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5.

Keywords: kbhotfixserver kbqfe kbbug kberrmsg kbexchange550presp5fix kbfix kbqfe KB321006

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