KB886903

This is a silent installer for KB886903 for Windows 2000:

<package id="kb8869032k" name="KB886903 for Windows 2000">

<!-- Microsoft Security Bulletin MS05-004 -->
<check type="file" condition="versiongreaterorequal"
 path="%Windir%\Microsoft.NET\Framework\v1.1.4322\System.Web.dll" value="1.1.4322.2037" />
<install cmd='%SOFTWARE%\hotfixes\enu\NDP1.1sp1-KB886903-X86.exe /q /i' >
<exit code="194" reboot="true" />
<exit code="1603" />
<exit code="3010" reboot="true" />
</install>
</package> 

This is a silent installer for KB886903 for Windows XP:

<package id="kb886903xp" name="KB886903 for Windows XP">

<!-- ASP.NET Security Update for Microsoft .NET Framework 1.1 Service Pack 1 -->
<!-- Microsoft Security Bulletin MS05-004 -->
<!-- "ASP.NET Path Validation Vulnerability (887219)" -->
<check type="file" condition="versiongreaterorequal" path="%Windir%\Microsoft.NET\Framework\v1.1.4322\System.Web.dll" value="1.1.4322.2037" />
<install cmd='cmd /c if not exist %Windir%\wpkg-hack-886903 %SOFTWARE%\hotfixes\common\ENU\NDP1.1sp1-KB886903-X86.exe /q /i'>
<exit code="194" reboot="true" />
<exit code="3010" />
</install>
<install cmd='cmd /c copy %Windir%\win.ini %Windir%\wpkg-hack-886903' />
</package>