http://www.aviationtoday.com/2017/11/08/boeing-757-testing-shows-airplanes-vulnerable-hacking-dhs-says/ Just think what they could do with Brand A Image Unavailable, Please Login
This paragraph in the article is startling: The cost to change one line of code on a piece of avionics equipment is $1 million, and it takes a year to implement. For Southwest Airlines, whose fleet is based on Boeing’s 737, it would “bankrupt” them if a cyber vulnerability was specific to systems on board 737s, he said, adding that other airlines that fly 737s would also see their earnings hurt. Hickey said newer models of 737s and other aircraft, like Boeing’s 787 and the Airbus Group A350, have been designed with security in mind, but that legacy aircraft, which make up more than 90% of the commercial planes in the sky, don’t have these protections.
There was this from during the 787 development. https://www.wired.com/2008/01/dreamliner-security/ Apparently the FAA was satisfied with the fix, but a software solution doesn't seem like the most robust route to take. http://www.academia.edu/10377642/CASE_STUDY_BOEING_787_DREAMLINER_NETWORK_SECURITY
Sorry...I don't buy any of these scary tales...hackers might be able to change your in flight entertainment options, but hack the flight, nav, or engine control functions...I'm way skeptical...