CVE-2021-38492 : Vulnerability Insights and Analysis

Firefox, Thunderbird, and Firefox ESR versions are affected by a vulnerability that could allow attackers to launch pages and execute scripts in Internet Explorer. Learn more about CVE-2021-38492 below.

Understanding CVE-2021-38492

This CVE identifies a security vulnerability affecting Mozilla's Firefox, Thunderbird, and Firefox ESR products.

What is CVE-2021-38492?

When delegating navigations to the operating system, Firefox would accept the

mk

scheme, potentially enabling attackers to execute scripts in Internet Explorer.

The Impact of CVE-2021-38492

The vulnerability could permit attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode, affecting Firefox < 92, Thunderbird < 91.1, Thunderbird < 78.14, Firefox ESR < 78.14, and Firefox ESR < 91.1.

Technical Details of CVE-2021-38492

The technical details of the CVE provide insights into the vulnerability's nature.

Vulnerability Description

The vulnerability arises from Firefox's acceptance of the

mk

scheme, enabling potential exploitation by attackers.

Affected Systems and Versions

Mozilla's Firefox, Thunderbird, and Firefox ESR versions prior to the specified versions are susceptible to this vulnerability.

Exploitation Mechanism

By utilizing the

mk

scheme in delegating navigations, attackers can potentially execute scripts in Internet Explorer.

Mitigation and Prevention

Understanding the necessary steps to mitigate and prevent the exploitation of CVE-2021-38492 is crucial.

Immediate Steps to Take

Users are advised to update their Firefox, Thunderbird, and Firefox ESR to versions greater than the specified vulnerable versions.

Long-Term Security Practices

Maintaining a regular software update routine and staying informed about security advisories can enhance long-term security.

Patching and Updates

Regularly applying security patches and updates for all affected software is essential to safeguard against known vulnerabilities.