CVE-2019-11716 Explained : Impact and Mitigation

A vulnerability in Firefox versions older than 68 allows bypassing sandboxes due to restricted visibility of window.globalThis until accessed by a script.

Understanding CVE-2019-11716

This CVE involves a security issue in Firefox versions prior to 68 that could potentially lead to sandbox bypass.

What is CVE-2019-11716?

The vulnerability restricts the visibility of window.globalThis until it is specifically accessed by a script, potentially allowing bypassing of sandboxes that rely on enumerating and restricting access to the window object.

The Impact of CVE-2019-11716

The vulnerability could be exploited to bypass sandboxing methods, compromising the security of affected systems.

Technical Details of CVE-2019-11716

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The visibility of window.globalThis to certain code is restricted until explicitly accessed by a script, potentially leading to sandbox bypass.

Affected Systems and Versions

Product: Firefox
Vendor: Mozilla
Versions Affected: Older than 68

Exploitation Mechanism

The vulnerability allows attackers to potentially bypass sandboxes by exploiting the restricted visibility of window.globalThis.

Mitigation and Prevention

Protective measures to address the CVE.

Immediate Steps to Take

Update Firefox to version 68 or newer to mitigate the vulnerability.
Monitor vendor advisories and apply patches promptly.

Long-Term Security Practices

Regularly update software to the latest versions.
Implement secure coding practices to prevent similar vulnerabilities.

Patching and Updates

Apply security patches provided by Mozilla promptly to address the vulnerability.