CVE-2018-6066 Explained : Impact and Mitigation

Google Chrome before version 65.0.3325.146 had a vulnerability in ResourceFetcher/ResourceLoader in Blink, allowing attackers to access cross-origin data through a malicious HTML page.

Understanding CVE-2018-6066

This CVE involves a lack of CORS checking in Google Chrome, potentially leading to data leakage.

What is CVE-2018-6066?

Before version 65.0.3325.146 of Google Chrome, the ResourceFetcher/ResourceLoader in Blink had a vulnerability where CORS checking was not implemented properly. This flaw enabled an attacker to access and retrieve cross-origin data through a maliciously designed HTML page.

The Impact of CVE-2018-6066

The vulnerability allowed remote attackers to leak cross-origin data, posing a risk to user privacy and data security.

Technical Details of CVE-2018-6066

Google Chrome's vulnerability details and affected systems.

Vulnerability Description

The ResourceFetcher/ResourceLoader in Blink in Google Chrome prior to 65.0.3325.146 lacked proper CORS checking, enabling a remote attacker to leak cross-origin data via a crafted HTML page.

Affected Systems and Versions

Product: Chrome
Vendor: Google
Versions Affected: < 65.0.3325.146

Exploitation Mechanism

Attackers could exploit this vulnerability by creating a specially crafted HTML page to access and retrieve cross-origin data.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2018-6066.

Immediate Steps to Take

Update Google Chrome to version 65.0.3325.146 or newer to patch the vulnerability.
Avoid visiting untrusted websites or clicking on suspicious links.

Long-Term Security Practices

Regularly update browsers and software to the latest versions.
Implement strict CORS policies to prevent unauthorized data access.

Patching and Updates

Stay informed about security updates from Google Chrome and apply patches promptly to address known vulnerabilities.