SMM exploit POC code published

and finally:

Intel has informed us that they have been working on a solution to prevent caching attacks on SMM memory for quite a while and have also engaged with OEMs/BIOS vendors to implement certain new mechanisms that are supposed to prevent the attack. According to Intel, many new systems are protected against the attack. We have found out, however, that some of the Intel 's recent motherboards, like e.g. the popular DQ35, are still vulnerable to the attack. Additionally the workarounds that Intel has mentioned to us are not yet officially documented, but Intel told us that they will be updating the CPU documentation shortly (In particular the vol. 3a of [4]).

The paper is here (pdf).