The hack of simulated aircraft systems with an Android phone may have been an overstated media stunt and perhaps not a possibility with MH 370.
However, as we go more and more digital on the flight deck, this computer and digital comm stuff is a threat surface we really need to consider in my opinion.
For fear of repeating what I said a mere 3114 posts prior to yours.....
Well, sure they could perhaps, maybe do something to something.
But how much could they do to safety critical systems ? I suspect the numbers plummet dramatically, if not to zero.
How much could they do to safety critical systems that the flight crew could not overrule by flicking a switch or pulling a CB ? I suspect the number is exactly zero.
Therefore, as you say.... it was an "overstated media stunt". We all know how the media like a good aviation story they can hype up... and what better than an aviation security story for the journos to have a field day on !
Both regulators and the manufacturers looked at his claims and found no issues with aircraft systems.