pwninit

A tool for automating starting binary exploit challenges

Features

• Set challenge binary to be executable
• Download a linker (ld-linux.so.*) that can flawlessly LD_PRELOAD the provided libc
• Download debug symbols and unstrip the libc
• Fill in a template pwntools solve script

Usage

Short version

Run pwninit

Long version

Run pwninit in a directory with the relevant files and it will detect which ones are the binary, libc, and linker. If the detection is wrong, you can specify the locations with --bin, --libc, and --ld.

Install

Arch Linux

Install pwninit from the AUR.

Using cargo

cargo install pwninit

The binary will be placed in ~/.cargo/bin.

Example

$ ls
hunter  libc.so.6  readme

$ pwninit
bin: ./hunter
libc: ./libc.so.6

fetching linker
unstripping libc
setting ./ld-2.23.so executable
writing solve.py stub

$ ls
hunter  ld-2.23.so  libc.so.6  readme  solve.py

solve.py:

#!/usr/bin/env python2

from pwn import *

exe = ELF("./hunter")
libc = ELF("./libc.so.6")
ld = ELF("./ld-2.23.so")

context.binary = exe


def conn():
    if args.LOCAL:
        return process([ld.path, exe.path], env={"LD_PRELOAD": libc.path})
    else:
        return remote("addr", 1337)


def main():
    r = conn()

    # good luck pwning :)

    r.interactive()


if __name__ == "__main__":
    main()