CVE-2021-23958 : Security Advisory and Response

This article provides an in-depth look into CVE-2021-23958, a vulnerability that affects Mozilla Firefox versions prior to 85.

Understanding CVE-2021-23958

This section delves into the specifics of the CVE-2021-23958 vulnerability and its implications.

What is CVE-2021-23958?

The vulnerability in Mozilla Firefox (< 85) could lead to the incorrect transfer of screen sharing state between tabs, potentially exposing sensitive information.

The Impact of CVE-2021-23958

The impact of CVE-2021-23958 is the leakage of screen sharing permission across tabs, allowing unintended access to private data.

Technical Details of CVE-2021-23958

This section outlines the technical aspects of the CVE-2021-23958 vulnerability.

Vulnerability Description

Mozilla Firefox versions prior to 85 are susceptible to transferring screen sharing state incorrectly between tabs, potentially resulting in data leakage.

Affected Systems and Versions

The vulnerability affects Firefox versions lower than 85, leaving them vulnerable to unauthorized information exposure.

Exploitation Mechanism

Attackers could exploit this vulnerability by manipulating screen sharing permissions to access confidential data across Firefox tabs.

Mitigation and Prevention

In this section, you will find guidance on mitigating and preventing the risks posed by CVE-2021-23958.

Immediate Steps to Take

Users are advised to update their Mozilla Firefox browser to version 85 or higher to address this vulnerability and prevent unauthorized data leaks.

Long-Term Security Practices

Implementing regular browser updates, maintaining good browsing habits, and avoiding sharing sensitive information via insecure channels are vital for long-term security.

Patching and Updates

Stay updated with security patches and follow official security advisories from Mozilla to stay protected against known vulnerabilities.