In recent times, a vulnerability has drawn attention due to its potential impact on browsers. This vulnerability, identified as CVE-2024-11694, exhibits a weakness within the Enhanced Tracking Protection's Strict mode. It has been identified that it allows a Content Security Policy (CSP) frame-src bypass and a DOM-based XSS attack through the Google SafeFrame shim in the Web Compatibility extension. This issue poses a serious threat, as attackers could exploit it to execute malicious frames portraying themselves as legitimate content.

Exploit Details

In an attempt to demonstrate the vulnerability and understand it in detail, we have broken down the exploit into multiple steps:

To give you a better insight, let's take a look at an example code snippet

<html>
<head>
  <title>CVE-2024-11694 Demo</title>
  <meta http-equiv="Content-Security-Policy" content="frame-src 'self' https://tpc.googlesyndication.com;">;
</head>
<body>
  <!-- Legitimate Google SafeFrame -->
  <iframe src="https://tpc.googlesyndication.com/safeframe/1--38/html/container.html"></iframe>;
  <!-- Malicious Google SafeFrame -->
  <iframe src="https://evil.example.com/malicious-safeframe.html"></iframe>;
</body>
</html>

In the above snippet, a legitimate Google SafeFrame and an injected malicious Google SafeFrame are included. Here, the Content-Security-Policy allows only the legitimate Google SafeFrame. However, due to the vulnerability, the malicious SafeFrame can bypass this restriction, making it difficult for the user to distinguish the legitimate from the malicious.

Original References

For an in-depth understanding and further information about this vulnerability, you can refer to the following links:

- Mozilla Security Advisory: https://www.mozilla.org/en-US/security/advisories/mfsa2024-27/
- CVE Details: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-11694
- Google SafeFrame Documentation: https://developers.google.com/safeframe

Conclusion

It is evident that the CVE-2024-11694 vulnerability poses a significant threat to users, exposing them to malicious attacks. Therefore, it is highly recommended that users update their browsers to the patched versions to safeguard themselves from potential exploits. In this context, users should keep a watchful eye on security updates and remain informed about emerging threats.

As an essential practice, users must be wary of the websites they visit and the content they interact with, as threat actors will always devise new ways to exploit vulnerabilities in popular software. Keeping a vigilant eye and employing robust security measures can significantly reduce the risk of falling prey to such potentially harmful online hazards.

Timeline

Published on: 11/26/2024 14:15:18 UTC
Last modified on: 11/27/2024 17:15:09 UTC