CVE-2021-21184 : Exploit Details and Defense Strategies

Inappropriate implementation in performance APIs in Google Chrome prior to version 89.0.4389.72 allowed a remote attacker to leak cross-origin data via a crafted HTML page.

Understanding CVE-2021-20657

This CVE relates to a vulnerability in Google Chrome that could be exploited by a remote attacker to leak cross-origin data.

What is CVE-2021-20657?

The CVE-2021-20657 involves inappropriate implementation in performance APIs in Google Chrome versions earlier than 89.0.4389.72, enabling a remote attacker to extract cross-origin data.

The Impact of CVE-2021-20657

The vulnerability could potentially be exploited by a malicious actor to extract sensitive data across different origins via a specially crafted HTML page.

Technical Details of CVE-2021-20657

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability arises due to the improper implementation of performance APIs in Google Chrome, allowing the leakage of cross-origin data.

Affected Systems and Versions

Google Chrome versions before 89.0.4389.72 are impacted by this vulnerability.

Exploitation Mechanism

A remote attacker can exploit this vulnerability by luring a user to visit a malicious website containing a specially crafted HTML page to extract sensitive cross-origin data.

Mitigation and Prevention

To protect against the CVE-2021-20657 vulnerability, immediate action and long-term security practices are essential.

Immediate Steps to Take

Users are advised to update their Google Chrome browser to version 89.0.4389.72 or newer to mitigate the risk of exploitation.

Long-Term Security Practices

Regularly updating software, practicing safe browsing habits, and implementing security measures can enhance overall cybersecurity.

Patching and Updates

It is crucial for users to regularly install security patches and updates released by Google Chrome to address known vulnerabilities and enhance system security.