Overview
In the rapidly evolving landscape of cybersecurity, vulnerabilities in widely used software can pose significant risks. One such vulnerability, identified as CVE-2025-3620, affects Google Chrome, one of the most popular web browsers globally. This high-severity flaw can potentially enable a remote attacker to exploit heap corruption via a specially crafted HTML page, which could lead to system compromise or data leakage. Given the widespread use of Google Chrome, this vulnerability has broad implications and demands immediate attention.
Vulnerability Summary
CVE ID: CVE-2025-3620
Severity: High (8.8 CVSS score)
Attack Vector: Network
Privileges Required: None
User Interaction: Required
Impact: System compromise, potential data leakage
Affected Products
No phone number, email, or personal info required.
Product | Affected Versions
Google Chrome | Prior to 135.0.7049.95
How the Exploit Works
The vulnerability stems from a use-after-free condition in the USB component of Google Chrome. A use-after-free error occurs when a piece of memory is used after it has been freed, which can lead to program instability or, in the worst case, a potential security vulnerability.
In this case, a remote attacker can craft a specific HTML page to trigger this vulnerability. If a user visits this page, it could exploit the flaw to cause heap corruption. This corruption could then be leveraged to execute arbitrary code in the context of the current user, potentially leading to system compromise or data leakage.
Conceptual Example Code
While the exact payload would depend on the specifics of the target system, the general approach might be something like this:
<html>
<body>
<script>
var uaf_object = new USBDevice();
uaf_object.close(); // Frees the object
// uaf_object is now a Use-After-Free (UAF) object
// Force JavaScript engine to reuse the freed memory space
for (var i = 0; i < 0x1000; i++) {
var arr = new Array(uaf_object);
}
// The malicious code that will be executed when the UAF object is used
arr[0x800] = "arbitrary code";
</script>
</body>
</html>In this example, the crafted HTML page creates a new USBDevice object, immediately frees it, and then attempts to use it again. This misuse can lead to heap corruption, which is then exploited to insert and execute arbitrary code within the browser’s context.