Microsoft KB Archive/894538

= When Internet Authentication Service receives an unknown attribute in a packet, a Windows Server 2003-based Internet Authentication Service server stops responding =

Article ID: 894538

Article Last Modified on 7/24/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Web Edition
 * Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
 * Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems

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SYMPTOMS
A Microsoft Windows Server 2003-based Microsoft Internet Authentication Service (IAS) server stops responding when IAS receives an unknown attribute in a packet.

Also, the following event message may appear in the Application log in Event Viewer: Event Type: Error Event Source: Application Error Event Category: (100) Event ID: 1000 Date: 12/07/2004 Time: 4:38:12 AM User: N/A Computer:  Description: Faulting application svchost.exe, version 5.2.3790.0, faulting module iassam.dll, version 5.2.3790.0, fault address 0x00009ace.

For more information, see Help and Support Center at http://support.microsoft.com. Data: 0000: 41 70 70 6c 69 63 61 74 Applicat 0008: 69 6f 6e 20 46 61 69 6c ion Fail 0010: 75 72 65 20 20 73 76 63 ure svc 0018: 68 6f 73 74 2e 65 78 65 host.exe 0020: 20 35 2e 32 2e 33 37 39 5.2.379 0028: 30 2e 30 20 69 6e 20 69 0.0 in i 0030: 61 73 73 61 6d 2e 64 6c assam.dl 0038: 6c 20 35 2e 32 2e 33 37 l 5.2.37 0040: 39 30 2e 30 20 61 74 20 90.0 at 0048: 6f 66 66 73 65 74 20 30 offset 0 0050: 30 30 30 39 61 63 65 0009ace



Service pack information
To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

Hotfix information
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 do not 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.Windows Server 2003, Itanium-based versions   Date         Time   Version            Size    File name     Platform -  19-Apr-2005  00:15  5.2.3790.312      336,384  Iassam.dll    IA-64 19-Apr-2005 00:15  5.2.3790.312      102,400  Wiassam.dll   x86 Windows Server 2003, x86-based versions   Date         Time   Version            Size    File name -  19-Apr-2005  15:15  5.2.3790.312      102,400  Iassam.dll



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section. This problem was corrected in Windows Server 2003 Service Pack 1.



MORE INFORMATION
For more 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: IAS unknown attribute crash

Keywords: kbocabucket kbbug kbfix kbwinserv2003presp1fix kbpubtypekc kbhotfixserver kbqfe KB894538

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