CVE-2021-21196 Explained : Impact and Mitigation

Heap buffer overflow in TabStrip in Google Chrome on Windows prior to 89.0.4389.114 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.

Understanding CVE-2021-21196

This CVE refers to a heap buffer overflow vulnerability in Google Chrome that could allow a remote attacker to trigger heap corruption via a specially crafted HTML page.

What is CVE-2021-21196?

CVE-2021-21196 is a security vulnerability in Google Chrome that exists in the TabStrip functionality of the browser on Windows systems running versions below 89.0.4389.114.

The Impact of CVE-2021-21196

This vulnerability could be exploited by a remote attacker to execute arbitrary code or crash the browser, leading to potential heap corruption and compromise of the affected system.

Technical Details of CVE-2021-21196

This section provides more insight into the vulnerability including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability is a result of a heap buffer overflow in the TabStrip component of Google Chrome, potentially triggered by an attacker through a maliciously crafted HTML page.

Affected Systems and Versions

Google Chrome versions prior to 89.0.4389.114 on Windows systems are vulnerable to this heap buffer overflow issue.

Exploitation Mechanism

A remote attacker could exploit this vulnerability by enticing a user to visit a specially designed HTML page, leading to the execution of arbitrary code or browser crashes.

Mitigation and Prevention

To protect systems from CVE-2021-21196, certain immediate steps can be taken along with long-term security practices and timely patching.

Immediate Steps to Take

Users are advised to update their Google Chrome browser to version 89.0.4389.114 or higher to mitigate the risk of exploitation.

Long-Term Security Practices

Regularly update browsers and software applications, exercise caution while visiting unfamiliar websites, and be wary of clicking on suspicious links or downloading unknown files.

Patching and Updates

It is crucial to stay informed about security updates released by Google Chrome and apply patches promptly to address known vulnerabilities and reinforce system security.