CVE-2021-30538 : Security Advisory and Response

Google Chrome prior to version 91.0.4472.77 was affected by an insufficient policy enforcement vulnerability that allowed a remote attacker to bypass content security policy via a crafted HTML page.

Understanding CVE-2021-30538

This section will cover the details of the CVE-2021-30538 vulnerability in Google Chrome.

What is CVE-2021-30538?

CVE-2021-30538 is an insufficient policy enforcement vulnerability in content security policy in Google Chrome versions prior to 91.0.4472.77. It enabled a remote attacker to evade content security policy through a specifically designed HTML page.

The Impact of CVE-2021-30538

The impact of this vulnerability was significant as it allowed malicious actors to bypass content security policy, potentially leading to further exploitation and compromise of user systems.

Technical Details of CVE-2021-30538

This section will delve into the technical aspects of CVE-2021-30538.

Vulnerability Description

The vulnerability stemmed from the lack of proper enforcement in the content security policy of Google Chrome versions prior to 91.0.4472.77, creating a loophole for remote attackers.

Affected Systems and Versions

Google Chrome versions earlier than 91.0.4472.77 were affected by this vulnerability, exposing users of those versions to exploitation.

Exploitation Mechanism

Remote attackers could exploit this vulnerability by leveraging a crafted HTML page to bypass the content security policy implemented in Google Chrome.

Mitigation and Prevention

To address and prevent the CVE-2021-30538 vulnerability, certain steps and security measures are recommended.

Immediate Steps to Take

Users are advised to update their Google Chrome browsers to version 91.0.4472.77 or newer to mitigate the risk of exploitation through this vulnerability.

Long-Term Security Practices

Maintaining up-to-date software and regularly applying security patches are essential security practices to prevent exposure to known vulnerabilities like CVE-2021-30538.

Patching and Updates

Regularly checking for and applying browser updates and patches from trusted sources is crucial in ensuring protection against known vulnerabilities such as CVE-2021-30538.