CVE-2021-30555 : What You Need to Know

A security vulnerability, identified as CVE-2021-30555, was discovered in Google Chrome prior to version 91.0.4472.114. This vulnerability, categorized as 'Use after free in Sharing,' could allow an attacker to exploit heap corruption by convincing a user to install a malicious extension through a crafted HTML page and user gesture.

Understanding CVE-2021-30555

This section provides insights into the nature and impact of the CVE-2021-30555 vulnerability.

What is CVE-2021-30555?

The CVE-2021-30555 vulnerability is a 'Use after free' issue in Sharing in Google Chrome before version 91.0.4472.114. It enables an attacker to potentially exploit heap corruption by manipulating a user into installing a malicious extension.

The Impact of CVE-2021-30555

The impact of CVE-2021-30555 includes the potential for an attacker to execute arbitrary code and compromise the security and integrity of the affected system.

Technical Details of CVE-2021-30555

In this section, we delve into the technical specifics of the CVE-2021-30555 vulnerability.

Vulnerability Description

The vulnerability arises from a 'Use after free' issue in Sharing in Google Chrome versions prior to 91.0.4472.114, allowing an attacker to exploit heap corruption.

Affected Systems and Versions

Google Chrome versions less than 91.0.4472.114 are affected by this vulnerability in the Sharing functionality.

Exploitation Mechanism

Exploiting this vulnerability involves convincing a user to install a malicious extension via a crafted HTML page and user gesture.

Mitigation and Prevention

This section outlines the steps to mitigate and prevent exploitation of CVE-2021-30555.

Immediate Steps to Take

Users should update Google Chrome to version 91.0.4472.114 or later to prevent exploitation of this vulnerability. Additionally, exercise caution when installing browser extensions from untrusted sources.

Long-Term Security Practices

Maintaining up-to-date software, employing security best practices, and raising awareness among users about safe browsing habits can enhance overall cybersecurity defenses.

Patching and Updates

Regularly check for updates and security patches for Google Chrome to address known vulnerabilities and protect systems from potential threats.