CVE-2021-37993 : Security Advisory and Response

A use-after-free vulnerability in PDF Accessibility in Google Chrome before version 95.0.4638.54 could allow a remote attacker to exploit heap corruption through a maliciously crafted HTML page.

Understanding CVE-2021-37993

This section will provide an overview of the CVE-2021-37993 vulnerability in Google Chrome.

What is CVE-2021-37993?

CVE-2021-37993 is a use-after-free vulnerability in PDF Accessibility in Google Chrome versions prior to 95.0.4638.54. This flaw could be exploited by a remote attacker to potentially trigger heap corruption by enticing a user to visit a specially crafted HTML page.

The Impact of CVE-2021-37993

The impact of this vulnerability includes the potential for a remote attacker to execute arbitrary code, access sensitive information, or cause denial of service on affected systems running vulnerable versions of Google Chrome.

Technical Details of CVE-2021-37993

This section will delve deeper into the technical aspects of the CVE-2021-37993 vulnerability.

Vulnerability Description

The vulnerability arises from a use-after-free issue in PDF Accessibility within Google Chrome, allowing attackers to manipulate heap memory via specifically designed HTML content.

Affected Systems and Versions

Google Chrome versions prior to 95.0.4638.54 are affected by this vulnerability. Users of these versions are at risk of exploitation if exposed to malicious HTML content.

Exploitation Mechanism

Attackers can exploit this vulnerability by luring users to visit a malicious website containing specially crafted HTML code, triggering the use-after-free condition and potentially leading to heap corruption.

Mitigation and Prevention

In this section, we will discuss mitigation strategies and preventive measures to address CVE-2021-37993 in Google Chrome.

Immediate Steps to Take

Users are advised to update Google Chrome to version 95.0.4638.54 or newer to mitigate the risk of exploitation. Additionally, exercise caution when interacting with potentially unsafe websites or files.

Long-Term Security Practices

Maintaining up-to-date software and conducting regular security awareness training can help in preventing similar vulnerabilities in the future. Stay informed about security updates and best practices for safe browsing.

Patching and Updates

Google has released patches addressing CVE-2021-37993 in newer versions of Chrome. Ensure prompt installation of updates to stay protected against known security threats.