CVE-2021-23962 : Vulnerability Insights and Analysis

A use-after-poison vulnerability has been identified in Mozilla Firefox versions prior to 85. Exploitation of this vulnerability could lead to a potentially exploitable crash. Learn more about CVE-2021-23962 and how to mitigate the risks.

Understanding CVE-2021-23962

This section will provide an overview of the CVE-2021-23962 vulnerability affecting Mozilla Firefox versions prior to 85.

What is CVE-2021-23962?

The vulnerability stems from the incorrect use of the '<RowCountChanged>' method in Firefox, resulting in a use-after-poison issue that could trigger a potentially exploitable crash.

The Impact of CVE-2021-23962

Exploitation of this vulnerability could allow threat actors to execute arbitrary code or cause a denial of service, posing a significant risk to users of affected Firefox versions.

Technical Details of CVE-2021-23962

In this section, we delve into the specifics of the CVE-2021-23962 vulnerability, including its description, affected systems, and exploitation mechanism.

Vulnerability Description

The vulnerability arises from the improper handling of the '<RowCountChanged>' method in Firefox, leading to a use-after-poison scenario that could result in a crash.

Affected Systems and Versions

Mozilla Firefox versions earlier than 85 are impacted by this vulnerability, making users of these versions susceptible to potential exploitation.

Exploitation Mechanism

Threat actors could exploit this vulnerability by leveraging the incorrect use of the '<RowCountChanged>' method to trigger a user-after-poison scenario and subsequently a potentially exploitable crash.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-23962, users and organizations should take immediate actions and implement long-term security practices.

Immediate Steps to Take

Users of Firefox versions prior to 85 should update to the latest version immediately to prevent exploitation of this vulnerability. Additionally, exercise caution while browsing potentially malicious websites.

Long-Term Security Practices

Establish robust security measures, including regular software updates, endpoint protection, and security awareness training, to enhance overall security posture.

Patching and Updates

Ensure that systems running affected Firefox versions are promptly patched with the latest updates from Mozilla to address the CVE-2021-23962 vulnerability.