By reading the 2 page paper from the author [0] - it's linked to somewhere in this thread:
"[...] SMM code is installed during the boot process by system firmware, the diversity of which typically precludes a widespread attack. However select components of system firmware are derived from a set of Unified Extensible Firmware Interface (UEFI) template code provided by Intel. Such is the case for the initial SMM entry point, which is almost universally deployed on modern systems. An attack directed against this specific code sequence achieves the widest possible coverage. [...]"
So theoretically it's exploitable on all Operating Systems. The exploit is using the combination of a hardware bug and UEFI code.
The hardware bug consists in allowing to relocate the APIC (Advanced Programmable Interrupt Controller) memory range to the memory range used by the SMM (System Management Mode) and so influencing the data in some of SMMs memory.
Oh, I was aware, but that was just my immediate thought, because I'd never really conceived of something like it. Thanks, though! I'm sure someone reading this thread found your comment very helpful.
"[...] SMM code is installed during the boot process by system firmware, the diversity of which typically precludes a widespread attack. However select components of system firmware are derived from a set of Unified Extensible Firmware Interface (UEFI) template code provided by Intel. Such is the case for the initial SMM entry point, which is almost universally deployed on modern systems. An attack directed against this specific code sequence achieves the widest possible coverage. [...]"
So theoretically it's exploitable on all Operating Systems. The exploit is using the combination of a hardware bug and UEFI code.
The hardware bug consists in allowing to relocate the APIC (Advanced Programmable Interrupt Controller) memory range to the memory range used by the SMM (System Management Mode) and so influencing the data in some of SMMs memory.
[0] https://www.blackhat.com/docs/us-15/materials/us-15-Domas-Th...