weakness in md5 carries over as weakness in ca roots

The weakness I posted about yesterday is being presented right now at the CCC. I listened to the beginning of the preso just enough to get an idea of what they are doing (the stream is too broken up to properly listen to right now). It appears the team is able to leverage md5 collisions to fake a CA root certificate because the CA roots still validate by md5 hashes. So I suppose if you can MITM connections (or MITM the CA check?) you can pose as a Root CA and validate SSL certs that you control. I might have missed something there, since I’m not watching the rest of the preso right now.

Does this mean the Internet is buckling right now? Not really. I might change my mind if Joe Teenager down the street can hop on an open wifi network and MITM all SSL connections successfully without my knowing it.