I remember some crazy insecure drivers on Android drivers back in the day (2012-13 or so) -- stuff like `/dev/fbN` and `/dev/input/eventN` being world read/writ

I remember some crazy insecure drivers on Android drivers back in the day (2012-13 or so) -- stuff like `/dev/fbN` and `/dev/input/eventN` being world read/writeable, allowing unprivileged screen and input capture from any application. It was far more basic than what's described in this blog post, but really good fun to poke around at.