CVE-2021-21148 : Security Advisory and Response

Heap buffer overflow in V8 in Google Chrome prior to 88.0.4324.150 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Understanding CVE-2021-21148

This CVE describes a heap buffer overflow vulnerability in Google Chrome that could allow a remote attacker to exploit heap corruption.

What is CVE-2021-21148?

CVE-2021-21148 is a vulnerability in V8 in Google Chrome before version 88.0.4324.150 that enables a remote attacker to potentially trigger heap corruption by using a specially crafted HTML page.

The Impact of CVE-2021-21148

The impact of this vulnerability is that a remote attacker could exploit it to launch various attacks that may lead to the compromise of a user's system or sensitive information.

Technical Details of CVE-2021-21148

This section provides more in-depth technical details about the vulnerability.

Vulnerability Description

The vulnerability involves a heap buffer overflow in the V8 engine of Google Chrome before version 88.0.4324.150, allowing malicious actors to corrupt the heap by tricking a user into visiting a malicious website or opening a crafted HTML page.

Affected Systems and Versions

Google Chrome versions earlier than 88.0.4324.150 are affected by this heap buffer overflow vulnerability. Users with these versions are at risk of exploitation.

Exploitation Mechanism

The exploitation of this vulnerability involves a remote attacker designing a specially crafted HTML page to trigger the heap buffer overflow in the V8 engine, potentially leading to heap corruption.

Mitigation and Prevention

To address CVE-2021-21148 and prevent exploitation, follow the mitigation and prevention steps outlined below.

Immediate Steps to Take

Update Google Chrome to version 88.0.4324.150 or newer to mitigate the vulnerability.
Avoid clicking on suspicious links or visiting untrusted websites to minimize the risk of exploitation.

Long-Term Security Practices

Regularly update your browser and other software to the latest versions to protect against known vulnerabilities.
Implement security best practices, such as using ad blockers and content security policies, to enhance your overall security posture.

Patching and Updates

Stay informed about security updates and patches released by Google Chrome to address vulnerabilities like CVE-2021-21148. Promptly apply these updates to keep your system secure.