Comments moved to <a href="https://news.ycombinator.com/item?id=11166852" rel="nofollow">https://news.ycombinator.com/item?id=11166852</a>.
Troy Hunt's original story has more technical details which are worth the read: <a href="http://www.troyhunt.com/2016/02/controlling-vehicle-features-of-nissan.html" rel="nofollow">http://www.troyhunt.com/2016/02/controlling-vehicle-features...</a>