That is not a source that confirms SemiAccurate's claims, it's a nearly decade-old paper (~2008-2009) describing an attack against a completely different security feature. The "System Management Mode" described and attacked in the paper is unrelated to Intel ME.
>The details of our new SMM attacks will be made
available once Intel patches its firmware, most
likely we will present them at the Black Hat USA
conference in summer 2009. We will also make the
code of our TXT exploit available.