CVE-2019-5811 Explained : Impact and Mitigation

A flaw in the way Google Chrome handled CORS in ServiceWorker version prior to 74.0.3729.108 enabled a malicious actor to bypass the same origin policy by using a specially crafted HTML page.

Understanding CVE-2019-5811

What is CVE-2019-5811?

Incorrect handling of CORS in ServiceWorker in Google Chrome prior to 74.0.3729.108 allowed a remote attacker to bypass the same origin policy via a crafted HTML page.

The Impact of CVE-2019-5811

This vulnerability could be exploited by a remote attacker to bypass the same origin policy, potentially leading to unauthorized access to sensitive information or the execution of malicious code.

Technical Details of CVE-2019-5811

Vulnerability Description

The flaw in Google Chrome's handling of CORS in ServiceWorker versions prior to 74.0.3729.108 could be exploited by a malicious actor to bypass the same origin policy using a specially crafted HTML page.

Affected Systems and Versions

Product: Chrome
Vendor: Google
Versions Affected: < 74.0.3729.108

Exploitation Mechanism

The vulnerability could be exploited by a remote attacker through the use of a specially crafted HTML page to bypass the same origin policy in Google Chrome.

Mitigation and Prevention

Immediate Steps to Take

Update Google Chrome to version 74.0.3729.108 or later to mitigate the vulnerability.
Exercise caution when visiting untrusted websites or clicking on suspicious links.

Long-Term Security Practices

Regularly update browsers and software to the latest versions to patch known vulnerabilities.
Implement strict security policies and practices to prevent unauthorized access to sensitive information.

Patching and Updates

Stay informed about security updates and advisories from Google Chrome and apply patches promptly to secure systems and data.