CVE-2021-38491 Explained : Impact and Mitigation
Learn about CVE-2021-38491, a Firefox vulnerability affecting versions less than 92 due to mixed-content checks bypass. Find out the impact, affected systems, and mitigation steps.
This article provides detailed information on CVE-2021-38491, a vulnerability affecting Firefox versions before 92.
Understanding CVE-2021-38491
This section will cover what CVE-2021-38491 is and its impact.
What is CVE-2021-38491?
CVE-2021-38491 is a vulnerability in Firefox that resulted in mixed-content checks being unable to analyze opaque origins, leading to the loading of some mixed content.
The Impact of CVE-2021-38491
The vulnerability affects Firefox versions less than 92, potentially allowing malicious actors to exploit mixed-content issues.
Technical Details of CVE-2021-38491
In this section, we will delve into the vulnerability description, affected systems, versions, and exploitation mechanism.
Vulnerability Description
The vulnerability in Firefox allowed some mixed content to be loaded due to inadequate checks on opaque origins.
Affected Systems and Versions
Firefox versions prior to 92 are affected by this vulnerability.
Exploitation Mechanism
Malicious actors could exploit this vulnerability by manipulating the loading of mixed content on affected Firefox versions.
Mitigation and Prevention
Here, we will discuss steps to mitigate the impact of CVE-2021-38491 and prevent similar vulnerabilities in the future.
Immediate Steps to Take
Users should update their Firefox browser to versions 92 or newer to address the vulnerability.
Long-Term Security Practices
Regularly updating browsers and enabling security features such as mixed-content blocking are essential for long-term security.
Patching and Updates
Mozilla has released patches addressing CVE-2021-38491 in Firefox version 92 to mitigate the risk of exploitation.