Static binary without system, rop chain to execve syscall.

Full writeup: [https://ctf.rip/write-ups/pwn/metared-maradona123/#maradona3](https://ctf.rip/write-ups/pwn/metared-maradona123/#maradona3)

Original writeup (https://ctf.rip/write-ups/pwn/metared-maradona123/#maradona3).