Security Expert Claims He Hacked Airliner's Computer In Flight

Computer security expert Chris Roberts claims to have used the in-flight entertainment system to hack into the computer onboard the airliner he was flying:

http://www.usatoday.com/story/tech/2015/05/16/chris-roberts-fbi-plane-hack-one-world-labs/27448335/

http://www.dailymail.co.uk/news/article-3084856/Security-researcher-admits-FBI-hacked-commercial-airline-s-entertainment-took-control-plane-making-climb-fly-sideways.html

http://aptn.ca/news/2015/05/15/hacker-told-f-b-made-plane-fly-sideways-cracking-entertainment-system/

If this is a real vulnerability, then airlines and manufacturers had better address the problem before terrorists try to do something serious.