Writeup from author with source code attached.Unfortunatly no solves on this one :(
[https://github.com/0x4d5a-ctf/Writeups/tree/master/2019/Camp2019/licpwn_2/documentation](https://github.com/0x4d5a-ctf/Writeups/tree/master/2019/Camp2019/licpwn_2/documentation)