CVE-2021-23963 : Security Advisory and Response

This article provides an overview of CVE-2021-23963, a vulnerability affecting Mozilla Firefox versions prior to 85.

Understanding CVE-2021-23963

CVE-2021-23963 is a security vulnerability in Firefox that could lead to a loss of control over granted permissions when sharing geolocation during an active WebRTC share.

What is CVE-2021-23963?

When sharing geolocation in Firefox with a live WebRTC session, a reset in the webRTC sharing state may occur, resulting in a disruption in permission control.

The Impact of CVE-2021-23963

This vulnerability impacts Firefox versions earlier than version 85, potentially allowing unauthorized access to shared geolocation information.

Technical Details of CVE-2021-23963

The technical details of this CVE include:

Vulnerability Description

Firefox < 85 is susceptible to an issue where sharing geolocation during an active WebRTC session may reset the sharing state, leading to permission control loss.

Affected Systems and Versions

The vulnerability affects all versions of Firefox that are below version 85.

Exploitation Mechanism

Exploiting this vulnerability involves manipulating the webRTC sharing state during an active geolocation sharing session in Firefox.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-23963, consider the following steps:

Immediate Steps to Take

Users are advised to update their Firefox browser to version 85 or higher to prevent exploitation of this vulnerability.

Long-Term Security Practices

Implementing best security practices when sharing geolocation data and regularly updating browser versions can help prevent such vulnerabilities.

Patching and Updates

Ensure timely installation of security patches and updates released by Mozilla to address CVE-2021-23963.