CVE-2024-1671: Bypassing Content Security Policy in Google Chrome Versions Prior to 122..6261.57 through Inappropriate Site Isolation Implementation
In today's digital age, browser security is a top concern for both individuals and organizations. One such browser security feature is the Content Security Policy (CSP), which aims to prevent cross-site scripting (XSS) and other code injection attacks. However, when it comes to Google Chrome versions prior to 122..6261.57, there is an inappropriate implementation in Site Isolation that allows a remote attacker to bypass content security policy via a crafted HTML page. This security vulnerability has been assigned the identifier CVE-2024-1671 and has a severity rating of "Medium" according to Chromium security.
Content Security Policy (CSP) and Site Isolation
Content Security Policy (CSP) is a security feature that adds an extra layer of protection against content injection attacks such as cross-site scripting (XSS) [1]. It accomplishes this by specifying what sources of content are allowed to be loaded by the browser, thereby limiting the ability of attackers to execute malicious code on a webpage. Site Isolation, another security feature in Chrome, improves the security of the browser by running each website in a separate process, limiting the ability of an attacker to steal information or compromise the user's browser [2].
CVE-2024-1671 Vulnerability and Exploit Details
CVE-2024-1671 refers to an inappropriate implementation in Site Isolation in Google Chrome versions prior to 122..6261.57. This vulnerability allows a remote attacker to bypass content security policy restrictions via a carefully crafted HTML page. In essence, the issue lies within an attacker being able to load content that should be restricted by the browser's CSP, giving potential access to sensitive user information or causing unintended behavior from the user's perspective.
To illustrate how this vulnerability can be exploited, let's look at a simple yet effective example
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Security-Policy" content="default-src 'self'">
</head>
<body>
<!-- Content from the same origin is allowed, external content should be blocked -->
<img src="allowed_image.jpg" alt="Allowed Image">
<!-- The following image should be blocked, but can be loaded because of the vulnerability -->
<img src="https://attacker.example.com/exploit_image.jpg"; alt="Exploit Image">
</body>
</html>
In the example above, the Content Security Policy restricts the loading of resources to only those from the same origin ('self'). However, due to the vulnerability, an image hosted on an external domain can still be loaded, bypassing the CSP restrictions in place.
Original References and Further Reading
To stay up-to-date on the latest security vulnerabilities, it's crucial to follow official sources and references. For CVE-2024-1671, the following resources will provide more in-depth information:
1. Chromium issue tracker: Issue 1065642: Inappropriate implementation in Site Isolation
2. Chromium blog post: Chromium Content Security Policy (CSP)
3. Chromium blog post: Site Isolation for web developers
In Conclusion
CVE-2024-1671 is a medium-severity vulnerability that affects Google Chrome versions prior to 122..6261.57. The vulnerability allows for the inappropriate implementation of Site Isolation, enabling attackers to bypass the browser's content security policies. To protect yourself from such vulnerabilities, it's essential to keep your browser updated and stay informed about new security issues within the industry.
Timeline
Published on: 02/21/2024 04:15:08 UTC
Last modified on: 02/26/2024 16:27:52 UTC