CVE-2021-30528 : Security Advisory and Response

A critical security vulnerability, CVE-2021-30528, was discovered in Google Chrome on Android prior to version 91.0.4472.77. This vulnerability allowed a remote attacker to potentially exploit heap corruption through a crafted HTML page.

Understanding CVE-2021-30528

This section provides insights into the nature of the CVE-2021-30528 vulnerability.

What is CVE-2021-30528?

The CVE-2021-30528 vulnerability involves a 'Use after free' issue in WebAuthentication within Google Chrome on Android before version 91.0.4472.77. This flaw could be leveraged by a remote attacker who had compromised the renderer process of a user with saved credit card information in their Google account.

The Impact of CVE-2021-30528

The impact of this vulnerability could lead to heap corruption, potentially enabling attackers to execute arbitrary code or carry out other malicious activities on the affected system.

Technical Details of CVE-2021-30528

This section delves into the technical aspects of CVE-2021-30528.

Vulnerability Description

CVE-2021-30528 is classified as a 'Use after free' vulnerability, signifying an error where memory is accessed after it has been freed, leading to potential exploitation by attackers.

Affected Systems and Versions

The vulnerability affects Google Chrome on Android versions prior to 91.0.4472.77.

Exploitation Mechanism

By exploiting the WebAuthentication component in older versions of Google Chrome, attackers could trigger heap corruption by luring users to visit a specially crafted HTML page.

Mitigation and Prevention

Learn how to mitigate and prevent exploitation of CVE-2021-30528.

Immediate Steps to Take

Users are advised to update Google Chrome on Android to version 91.0.4472.77 or newer to remediate the vulnerability.

Long-Term Security Practices

Implementing secure browsing habits and keeping software up to date are vital practices for long-term security.

Patching and Updates

Regularly check for and apply security patches and updates to mitigate the risk of potential vulnerabilities.