This isn’t specifically a SharePoint patching issue, but it’s close enough I thought I’d add it. A recent .NET security patch, KB 4457916, while doing a bang-up job fixing a remote exploitation in .NET, broke Workflows in SharePoint. Of course you could uninstall the patch, but everyone except the bad guys think that’s a horrible idea. Fortunately there’s a fix that allows you all the protection of the patch as well as continue to enjoy SharePoint workflows. This blog post on MSDN provides the solution;
After that, you should be good to go.
This issue punctuates why it’s important to keep an eye on the Windows patches on your SharePoint servers. If you’re using some sort of patch distribution service, like WSUS, your SharePoint servers should be in their own group.
If you’ve had any experience with this patch or the fix, leave a comment below.