KB2661254 breaks SharePoint

Question

Over the weekend, a variety of patches went out to our servers. One of those installed updates, KB2661254, broke our WSS 3.0 farm.

Specifically, we were seeing the following symptoms:

• Windows Server 2008 R2 machine w/ SSRS 2008 R2. Attempting to run a report directly on the SSRS server would display the IIS error page with a message "The resource cannot be found."
• Windows Server 2003 responsible for indexing/batch processing had only one webapp crash. Attempting to browse to the broken webapp would result in 401 UNAUTHORIZED errors.
• Windows Server 2003 (DEV.. actually running MOSS 2007) has a similar issue except all webapps seem to be broken. Attempting to browse to Central Admin gives 403 Forbidden. Attempting to browse to a random site collection gives 404. Curiously, I can still get output from an stsadm -o enumsites.

Seems that others are experiencing the issue.

Q: Can we keep the patch installed and fix SharePoint?

The workaround is to completely uninstall the patch (warning, reboot may be required immediately). If you have the option, do NOT install this patch without first testing in DEV!

Update

Attempted to run psconfig and received the following errors (in Upgrade.log):

[SPIisWebSiteWssSequence] [ERROR] [10/23/2012 11:38:32 AM]: Action 3.0.3.0 of Microsoft.SharePoint.Upgrade.SPIisWebSiteWssSequence failed.
[SPIisWebSiteWssSequence] [ERROR] [10/23/2012 11:38:32 AM]: InstallAspNet 174101101 failed.
[SPIisWebSiteWssSequence] [ERROR] [10/23/2012 11:38:32 AM]:    at Microsoft.SharePoint.Upgrade.EnsureAspNetScriptMapInstalled.Upgrade()
   at Microsoft.SharePoint.Upgrade.SPActionSequence.Upgrade()

Update 2

I found this article searching for the error above. Looking at the "ASP.NET is registered incorrectly in the Internet Information Services (IIS) metabase" section. I was a little afraid of just running commands willy nilly so I checked the Application Configuration on one of my SharePoint Web Sites in IIS and noticed it no longer has the asp.net extentions (asmx, aspx, etc)!!

Answer 1

Kit! you should of had a disaster recovery plan in place before hand, not looking for one now! But that aside follow the steps of Migrating to a new server.

Moving Sharepoint to New Server

Microsoft's official line on this patch is to uninstall and reinstall SharePoint, and always test patches out on a test server before applying to live.

After you have recovered spend some time looking into disaster recovery plans.