Overview
In this post, we will delve into a critical vulnerability that has been identified in Google Chrome on desktop platforms. The vulnerability, cataloged as CVE-2025-10200, is a Use-After-Free bug found in Chrome’s Serviceworker. Such vulnerabilities are marked as severe due to their potential for enabling remote attackers to exploit heap corruption via a crafted HTML page, leading to data leakage or even full system compromise.
As Google Chrome is one of the most widely used web browsers across the globe, this vulnerability affects an extensive number of users and systems, making it a critical concern for both individuals and businesses alike. It underlines the need for timely patching and the use of appropriate security measures.
Vulnerability Summary
CVE ID: CVE-2025-10200
Severity: Critical, CVSS score 8.8
Attack Vector: Network
Privileges Required: None
User Interaction: Required
Impact: Potential system compromise and data leakage
Affected Products
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Product | Affected Versions
Google Chrome | Prior to 140.0.7339.127
How the Exploit Works
This vulnerability arises from a Use-After-Free condition in the Serviceworker of Google Chrome. Use-After-Free refers to the attempt by a program to access memory after it has been freed, which can lead to a variety of undesirable outcomes including program crashes, incorrect computations, and even the execution of arbitrary code.
In this context, a remote attacker can create a specifically crafted HTML page that, when loaded and interacted with by a user, triggers this vulnerability. The exploit would manipulate the Serviceworker to access memory after it has been freed, leading to heap corruption, and potentially allowing the attacker to execute arbitrary code or cause system instability.
Conceptual Example Code
Below is a conceptual code snippet that represents how the vulnerability might be exploited. This is not an actual exploit code, but rather a simplified representation to illustrate the underlying concepts.
<!DOCTYPE html>
<html>
<body>
<script>
// Create a new ServiceWorker
navigator.serviceWorker.register('sw.js').then(function(reg) {
// Trigger the Use-After-Free vulnerability
reg.unregister().then(function() {
// Attempt to use the ServiceWorker after it's been unregistered
reg.sync.register('test');
});
});
</script>
</body>
</html>In this example, the ServiceWorker is unregistered, and an attempt is then made to use it, triggering the Use-After-Free vulnerability. The actual exploit would be far more complex and tailored to induce heap corruption, potentially leading to arbitrary code execution or system instability.
