[Read here](https://ethanwu.dev/blog/2021/07/14/redpwn-ctf-2021-rp2sm/) ([direct section jump link](https://ethanwu.dev/blog/2021/07/14/redpwn-ctf-2021-rp2sm/#rev))

Original writeup (https://ethanwu.dev/blog/2021/07/14/redpwn-ctf-2021-rp2sm/).