[Full Writeup](https://github.com/mdsnins/ctf-writeups/blob/master/2019/0ctf%202019/Wallbreaker%20Easy/WallbreakerEasy.md)Sorry for bad English!
Big steps.
1. Upload shared library2. Set LD_PRELOAD,  trigger /usr/bin/gs using Imagick to open invalid `.eps` file3. Get a shell!