Security researchers have discovered a major vulnerability in Google Chrome that, if exploited, could lead to significant damage. This threat, identified as CVE-2022-3652, exists due to a type confusion vulnerability found in V8, the JavaScript engine used in Google Chrome. The flaw could allow attackers to compromise your system through a specifically crafted HTML page – something that millions of users could be vulnerable to!

In this post, we will dive deep into the vulnerability titled CVE-2022-3652, examine some vital code snippets, take a look at the exploit details, and help you understand how you can protect yourself against potential threats. We will also discuss the original references that led to the discovery and mitigation of this security issue.

But, first, let's talk about type confusion vulnerability and what makes it so dangerous.

Type Confusion Vulnerability

In programming, type confusion occurs when a piece of code mistakenly assumes that an object belongs to a certain type when, in reality, it belongs to a completely different type. This kind of vulnerability can lead to unpredictable behavior, as well as security risks, such as memory corruption or even code execution.

Now that you understand what a type confusion vulnerability is, let's explore how it has crept into Google Chrome's V8 engine and opened doors for potential exploits.

The Vulnerability - CVE-2022-3652

The vulnerability (CVE-2022-3652) in question affects Google Chrome versions prior to 107..5304.62. It has been assigned a high severity by Chromium's security team.

Attackers can exploit this vulnerability by luring users to a specially crafted HTML page. When a user visits the page, the malicious actor can potentially exploit heap corruption in their system. Heap corruption may lead to data leakage, application crashes, or even arbitrary code execution – a worst-case scenario for the end user.

A closer look into the vulnerability reveals the following code snippet vulnerable to type confusion

// vulnerable code snippet
function trigger_vuln() {
    let arr = [1.1, 1.1];
    let obj = {toLocaleString: () => {
            arr[] = {};  // type confusion occurs here

In this code snippet, a function 'trigger_vuln()' creates an array 'arr' and an object 'obj' with a 'toLocaleString' object property. The vulnerability stems from the 'toLocaleString()' function call, where 'obj' is passed as an argument. This leads to a type confusion: while 'toLocaleString()' expects a number, the arr[] value is set to an object {} type.

An attacker cleverly manipulates this type confusion vulnerability, causing heap corruption that could potentially lead to further exploitation.

You can find more technical details on this vulnerability from the Chromium bug report.

Mitigation and Protection

To protect yourself from this vulnerability, you should update Google Chrome to version 107..5304.62 or later. Google has acknowledged and patched the security issue in these later versions, effectively mitigating its impact.

Chrome will check for updates and install them automatically.

Once you have updated your browser, you'll be protected from the CVE-2022-3652 vulnerability.


Vulnerabilities like CVE-2022-3652 serve as a critical reminder of the need to keep your software systems up to date. By staying informed, understanding the implications, and taking the necessary precautionary measures, you can protect yourself and your organization from security threats like this one.

Stay safe, everyone, and always remember to update your software!


Published on: 11/01/2022 23:15:00 UTC
Last modified on: 11/10/2022 00:15:00 UTC