I've seen an article from blackhat[0] talking about how someone attack the firmware of the battery, bit not the eathernet controller.<p>[0]-<a href="https://www.blackhat.com/presentations/bh-usa-09/CHEN/BHUSA09-Chen-RevAppleFirm-SLIDES.pdf" rel="nofollow">https://www.blackhat.com/presentations/bh-usa-09/CHEN/BHUSA0...</a>