Hack Air-Gapped Computers Using Heat
An anonymous reader writes Ben-Gurion University of the Negev (BGU) researchers have discovered a new method to breach air-gapped computer systems called "BitWhisper," which enables two-way communications between adjacent, unconnected PC computers using heat. BitWhisper bridges the air-gap between the two computers, approximately 15 inches apart that are infected with malware by using their heat emissions and built-in thermal sensors to communicate. It establishes a covert, bi-directional channel by emitting heat from one PC to the other in a controlled manner.
Also at Wired.
And how did Stuxnet spread?
In some cases, by exploiting removable media.
If you think there's no precedent for getting the infection onto the machine, you're horribly mistaken.
Lost at C:>. Found at C.
If anything, then, I'd say they've hacked the air gap, not the computers.
systemd is Roko's Basilisk.