Yes. We are working on an update to ASP.NET that we will release via Windows Update once it has been thoroughly tested and is ready for broad distribution.

Until the update is available, we will also publish details on workarounds (like the one described in this post) that can be applied immediately to help protect against the vulnerability.  Note that the workarounds are temporary - and will not be required once the update fixes the vulnerability in the underlying products.  They are intended to provide steps that you can take immediately until the update is available.