Update Available For Outlook Express Security Issue

ID: q168019

The information in this article applies to:

Microsoft Outlook Express 4.01 for Windows 95 and Windows NT 4.0
Microsoft Outlook Express 4.01 for Windows NT 4.0 on Compaq Alpha
Microsoft Outlook Express 4.01 for Windows 98

SUMMARY

Microsoft has made an update available to the Microsoft Outlook Express File Attachment patch for Windows operating systems, originally posted on July 27, 1998. This updated patch addresses variations of a problem involving file attachments with extremely long names. The update can be obtained from the following location:

   http://www.microsoft.com/ie/security

MORE INFORMATION

This issue can cause a crash or other unexpected behavior when attempting to open a file attachment with an extremely long file name. For example, one of the following may occur on Windows 95, Windows 98, and NT 4.0 x86 systems:

An error message similar to the following may be displayed:
This program has performed an illegal operation and will be shut down. If the problem persists, contact the program vendor.

If you click Details, you receive an error message similar to the following:

   MSIMN caused an invalid page fault in module <unknown> at
   0000:40404040.

Outlook Express may unexpectedly quit.

It is difficult but possible for an individual to cause malicious code to be executed on your computer as a result of this problem. There have not been any reports of customers being affected by this problem.

PATCH INFORMATION

Outlook Express 4.01 for Windows 95 and Windows NT 4.0 x86

   Patch File Name:  Oepat401.exe
   Available at:     http://www.microsoft.com/ie/security

   Updated File Name    Size (bytes)   Date        Version
   -------------------------------------------------------
   Msimnui.dll          1,689,872      8-6-98     4.72.2115.0
   Wab32.dll              398,608      8-6-98     4.72.2120.0
   Inetcomm.dll           350,480      8-6-98     4.72.2120.0

NOTE: If you are using Outlook Express 4.0 that comes with Internet Explorer 4.0, you must upgrade to Internet Explorer 4.01 in order to apply this update. You can upgrade to Internet Explorer 4.01 with Service Pack 1 at the following location:

   http://www.microsoft.com/ie

Outlook Express 4.01 for Windows 95 and Windows NT 4.0 x86

NOTE: Use this patch with Internet Explorer 4.01 Service Pack 1.

   Patch File Name:  Oepatsp1.exe
   Available at:     http://www.microsoft.com/ie/security

   Updated File Name    Size (bytes)   Date        Version
   -------------------------------------------------------
   Msimnui.dll          1,709,328      8-6-98     4.72.3120.0
   Wab32.dll              402,704      8-6-98     4.72.3155.0
   Inetcomm.dll           351,504      8-6-98     4.72.3155.0

Outlook Express 4.01 for Windows NT 4.0 on Compaq (DEC) Alpha

   Patch File Name:  Oepat401.exe
   Available at:     http://www.microsoft.com/ie/security

   Updated File Name    Size (bytes)   Date        Version
   -------------------------------------------------------
   Msimnui.dll          2,431,760      8-6-98     4.72.2115.0
   Wab32.dll              638,736      8-6-98     4.72.2120.0
   Inetcomm.dll           665,360      8-6-98     4.72.2120.0

Outlook Express 4.01 for Windows NT 4.0 for Compaq (DEC) Alpha

NOTE: Use this patch with Internet Explorer 4.01 Service Pack 1.

   Patch File Name:  Oepatsp1.exe
   Availability:     http://www.microsoft.com/ie/security

   Updated File Name    Size (bytes)   Date        Version
   -------------------------------------------------------
   Msimnui.dll          2,461,456      8-6-98     4.72.3120.0
   Wab32.dll              646,416      8-6-98     4.72.3155.0
   Inetcomm.dll           665,872      8-6-98     4.72.3155.0

Outlook Express 4.01 for Windows 98

   Patch File Name:  Oewupd1.exe
   Available at:     Microsoft Windows Update

   Updated File Name    Size (bytes)   Date        Version
   -------------------------------------------------------
   Msimnui.dll          1,709,328      8-6-98     4.72.3120.0
   Wab32.dll              402,704      8-6-98     4.72.3155.0
   Inetcomm.dll           351,504      8-6-98     4.72.3155.0

For information on how to use Microsoft Windows Update, please see the following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q189306
   TITLE     : How the Windows Update Tool Determines if an Update Is Valid

Additional query words: outex

Keywords          : kbpatch outexw95 outexnt outexw98 outex 
Version           : WINDOWS: 95 98 4.01
Platform          : WINDOWS winnt

Last Reviewed: August 20, 1998