[http://blog.redrocket.club/2018/06/21/midnightsunctf-finals-2018-1337router/](http://blog.redrocket.club/2018/06/21/midnightsunctf-finals-2018-1337router/)

Original writeup (http://blog.redrocket.club/2018/06/21/midnightsunctf-finals-2018-1337router/).