CVE-2019-11747 : Vulnerability Insights and Analysis

A security flaw in Firefox and Firefox ESR versions prior to 69 and 68.1 respectively allows the removal of HSTS settings from pre-loaded websites, compromising user security.

Understanding CVE-2019-11747

This CVE highlights a vulnerability in the "Forget about this site" feature in Firefox and Firefox ESR versions.

What is CVE-2019-11747?

The flaw causes websites on the pre-load list to lose their HSTS setting when the "Forget about this site" feature is used, potentially exposing users to security risks.

The Impact of CVE-2019-11747

The vulnerability affects user security by removing HSTS settings from pre-loaded websites, leaving users vulnerable to potential security breaches.

Technical Details of CVE-2019-11747

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The bug in Firefox and Firefox ESR versions prior to 69 and 68.1 respectively removes HSTS settings from pre-loaded websites when using the "Forget about this site" feature.

Affected Systems and Versions

Firefox versions prior to 69
Firefox ESR versions prior to 68.1

Exploitation Mechanism

The flaw occurs when the "Forget about this site" feature is used, causing websites on the pre-load list to lose their HSTS setting.

Mitigation and Prevention

Protecting systems from the CVE-2019-11747 vulnerability is crucial for maintaining security.

Immediate Steps to Take

Update Firefox and Firefox ESR to versions 69 and 68.1 respectively.
Avoid using the "Forget about this site" feature until the browser is updated.

Long-Term Security Practices

Regularly update browsers to the latest versions to patch security vulnerabilities.
Educate users on safe browsing practices to minimize security risks.

Patching and Updates

Apply all available security patches and updates to ensure protection against known vulnerabilities.