CVE-2021-21130 : What You Need to Know

A detailed overview of CVE-2021-21130, a vulnerability in Google Chrome that allowed a remote attacker to bypass filesystem restrictions via a crafted HTML page.

Understanding CVE-2021-21130

This section delves into the specifics of the CVE-2021-21130 vulnerability in Google Chrome.

What is CVE-2021-21130?

CVE-2021-21130 is an insufficient policy enforcement vulnerability in the File System API of Google Chrome prior to version 88.0.4324.96. This flaw allowed a remote attacker to bypass filesystem restrictions by exploiting a crafted HTML page.

The Impact of CVE-2021-21130

The vulnerability could be exploited by a malicious actor to circumvent filesystem restrictions, potentially leading to unauthorized access to sensitive information or the execution of arbitrary code on a victim's system.

Technical Details of CVE-2021-21130

This section provides technical insights into the CVE-2021-21130 vulnerability affecting Google Chrome.

Vulnerability Description

The vulnerability stemmed from insufficient policy enforcement within the File System API, enabling threat actors to evade filesystem protections through a specially crafted HTML page.

Affected Systems and Versions

Google Chrome versions prior to 88.0.4324.96 were impacted by this vulnerability. Users operating on earlier versions were at risk of exploitation.

Exploitation Mechanism

By leveraging the flaw in the File System API, attackers could design malicious HTML pages to manipulate filesystem restrictions, gaining unauthorized access to system resources.

Mitigation and Prevention

Explore the necessary steps to address and prevent the CVE-2021-21130 vulnerability in Google Chrome.

Immediate Steps to Take

Users are advised to update their Google Chrome browser to version 88.0.4324.96 or above to mitigate the risk of exploitation. It is crucial to employ caution while browsing and avoid clicking on suspicious links or downloading files from untrusted sources.

Long-Term Security Practices

To enhance cybersecurity resilience, users should practice secure browsing habits, regularly update their software, and utilize reputable security tools to detect and prevent potential threats.

Patching and Updates

Google Chrome users should stay informed about security updates and promptly apply patches released by the vendor to remediate known vulnerabilities and strengthen the overall security posture of their systems.