CVE-2021-21116 Explained : Impact and Mitigation

A heap buffer overflow vulnerability was discovered in Google Chrome prior to version 87.0.4280.141. This could allow a remote attacker to trigger heap corruption through a specifically crafted HTML page.

Understanding CVE-2021-21116

This section will delve into the details of the CVE-2021-21116 vulnerability in Google Chrome.

What is CVE-2021-21116?

The CVE-2021-21116 CVE identifier is assigned to a heap buffer overflow vulnerability in the audio component of Google Chrome before version 87.0.4280.141. Attackers could potentially exploit this issue by luring a victim to visit a malicious website hosting crafted content.

The Impact of CVE-2021-21116

The impact of this vulnerability is significant as it could lead to remote code execution or crash the browser, giving the attacker undue control over the affected system.

Technical Details of CVE-2021-21116

Let's dive deeper into the technical aspects of the CVE-2021-21116 vulnerability.

Vulnerability Description

The vulnerability involves a heap buffer overflow in the audio component of Google Chrome, enabling attackers to corrupt the heap memory through malicious HTML content.

Affected Systems and Versions

Google Chrome versions prior to 87.0.4280.141 are affected by this vulnerability. Users are urged to update to the latest version to mitigate the risk.

Exploitation Mechanism

The exploitation of this vulnerability involves an attacker crafting a specific HTML page that, when accessed by the victim using a vulnerable Chrome browser, triggers the heap buffer overflow.

Mitigation and Prevention

To safeguard systems from potential exploitation of CVE-2021-21116, it is crucial to implement the following security measures.

Immediate Steps to Take

Users should update their Google Chrome browser to version 87.0.4280.141 or later to patch the vulnerability and prevent potential attacks.

Long-Term Security Practices

Practicing safe browsing habits, avoiding suspicious links, and keeping browsers and other software applications up-to-date are essential to maintain a secure environment.

Patching and Updates

Regularly check for updates and security advisories from Google Chrome to address any new vulnerabilities that may arise.