CVE-2024-22400 : What You Need to Know

This CVE record involves an open redirect vulnerability in the user_saml container via the RelayState parameter in Nextcloud User Saml.

Understanding CVE-2024-22400

This vulnerability is classified as CWE-601, which refers to URL Redirection to an Untrusted Site, commonly known as an 'Open Redirect' vulnerability.

What is CVE-2024-22400?

In the context of the Nextcloud User Saml app, users could be directed to an uncontrolled third-party server when clicking on a link to the Nextcloud server. This could potentially lead to phishing attacks or other malicious activities.

The Impact of CVE-2024-22400

The impact of this vulnerability is considered low with a CVSS base score of 3.1. However, it still poses a risk as users can be tricked into visiting malicious websites unknowingly.

Technical Details of CVE-2024-22400

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability allows attackers to craft malicious links that appear legitimate, redirecting users to external untrusted sites, potentially leading to further security breaches.

Affected Systems and Versions

The following versions of the Nextcloud User Saml app are affected:

Version >= 5.0.0 and < 5.1.5
Version >= 5.2.0 and < 5.2.5
Version >= 6.0.0 and < 6.0.1

Exploitation Mechanism

The vulnerability exploits the RelayState parameter in the User Saml app, manipulating the link to redirect users to unintended destinations.

Mitigation and Prevention

To address CVE-2024-22400 and prevent exploitation, consider the following mitigation strategies.

Immediate Steps to Take

Upgrade the User Saml app to version 5.1.5, 5.2.5, or 6.0.1 to eliminate the vulnerability.
Educate users about the risks of clicking on unfamiliar or suspicious links to mitigate the chances of exploitation.

Long-Term Security Practices

Implement secure coding practices to avoid similar open redirect vulnerabilities in future app developments.
Regularly review and update security measures in place to protect against evolving threats.

Patching and Updates

Ensure that the Nextcloud User Saml app is kept up to date with the latest patches and security fixes to address known vulnerabilities and enhance overall security posture.