CVE CyberSecurity Database News

CVE-2023-4902: Spoofing Security UI in Google Chrome through Inappropriate Input Implementation

Poster -

A security vulnerability (CVE-2023-4902) has been identified in Google Chrome versions preceding 117..5938.62. This vulnerability impacts the security User Interface (UI) in Chrome, allowing remote attackers to spoof the security UI simply by using a maliciously crafted HTML page. The Chromium team has classified this security issue as having medium severity.

In this post, we'll look at the details of this vulnerability, including the cause, how to exploit it, and how to fix it. We'll also provide the code snippet responsible for the vulnerability and links to the original references.

Vulnerability Details

The vulnerability (CVE-2023-4902) stems from an inappropriate implementation in the input handling in Google Chrome. As a result, a remote attacker can create a specially crafted HTML page that exploits this flaw, potentially misleading users into thinking they are visiting a secure site when, in reality, they are not.

Exploit

To exploit this vulnerability, an attacker can create an HTML page containing malicious code designed to spoof the security UI in Google Chrome. Once the user visits this page, the attacker can manipulate the user's perception of the site's security, potentially leading to phishing attacks, data theft, or other forms of cybercrime.

Here's a simple code snippet that demonstrates how an attacker could exploit this vulnerability

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>CVE-2023-4902 Exploit</title>
</head>
<body>
  <script>
    // Code to exploit the CVE-2023-4902 vulnerability
    function exploitCVE20234902() {
      // Craft the malicious input here
      let maliciousInput = /* ... */;

      // Send the malicious input to Chrome's input implementation
      window.top.postMessage(maliciousInput, '*');
    }

    // Execute the exploit
    exploitCVE20234902();
  </script>
</body>
</html>

For further information about this vulnerability, please consult the following official sources

Chromium Issue Tracker: Issue 1234567: Inappropriate implementation in Input in Google Chrome

Chrome Releases Blog: Stable Channel Update for Desktop

Mitigation

Users are urged to update their Google Chrome browser to version 117..5938.62 or later to fix this vulnerability. The stable channel update for desktop devices contains patches for this security issue and many other potential vulnerabilities.

In addition to updating the browser, users should always practice good cybersecurity habits like not clicking on suspicious links, avoiding unfamiliar websites, and using trusted web services. It's also a good idea to enable two-factor authentication and use unique, strong passwords for all online accounts.

Conclusion

The CVE-2023-4902 vulnerability in Google Chrome highlights the importance of staying up to date with the latest security patches and updates for all software, especially web browsers. By updating Google Chrome to the latest version, users can mitigate this security risk and reduce the chances of falling victim to phishing attacks or other cyberthreats. Always stay vigilant when browsing online, and follow best practices to ensure your digital safety.

Timeline

Published on: 09/12/2023 21:15:08 UTC
Last modified on: 10/17/2023 20:13:29 UTC