CVE-2019-5838 : Security Advisory and Response

Google Chrome prior to version 75.0.3770.80 had insufficient policy enforcement in its extensions API, allowing attackers to bypass restrictions on file URIs through malicious Chrome Extensions.

Understanding CVE-2019-5838

This CVE relates to a vulnerability in Google Chrome that could be exploited by convincing users to install a specially crafted extension.

What is CVE-2019-5838?

Prior to version 75.0.3770.80, Google Chrome had inadequate policy enforcement in its extensions API, enabling attackers to override limitations on file URIs using a skillfully crafted Chrome Extension.

The Impact of CVE-2019-5838

This vulnerability allowed attackers to bypass restrictions on file URIs by exploiting the insufficient policy enforcement in Chrome extensions, potentially leading to unauthorized access and malicious activities.

Technical Details of CVE-2019-5838

Google Chrome's vulnerability details and affected systems.

Vulnerability Description

Insufficient policy enforcement in extensions API in Google Chrome prior to 75.0.3770.80 allowed attackers to bypass restrictions on file URIs via a crafted Chrome Extension.

Affected Systems and Versions

Product: Chrome
Vendor: Google
Versions Affected: < 75.0.3770.80

Exploitation Mechanism

Attackers could exploit this vulnerability by convincing users to install a malicious extension, enabling them to override limitations on file URIs.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2019-5838.

Immediate Steps to Take

Update Google Chrome to version 75.0.3770.80 or newer.
Avoid installing extensions from untrusted sources.
Regularly monitor for Chrome security updates.

Long-Term Security Practices

Educate users on safe extension installation practices.
Implement strict extension review processes.

Patching and Updates

Apply security patches promptly.
Stay informed about Chrome security advisories and updates.