CVE-2021-41021 Explained : Impact and Mitigation

A privilege escalation vulnerability in FortiNAC versions 8.8.8 and below and 9.1.2 and below may allow an admin user to escalate the privileges to root via the sudo command.

Understanding CVE-2021-41021

This CVE highlights a privilege escalation vulnerability affecting Fortinet FortiNAC.

What is CVE-2021-41021?

CVE-2021-41021 is a privilege escalation vulnerability present in FortiNAC versions 8.8.8 and below, as well as 9.1.2 and below. It enables an admin user to elevate privileges to root using the sudo command.

The Impact of CVE-2021-41021

The vulnerability has a base score of 7.8 (High Severity) and may result in high impacts on confidentiality, integrity, and availability, with low privileges required and local attack vector.

Technical Details of CVE-2021-41021

This section delves into the specifics of the vulnerability.

Vulnerability Description

The vulnerability in FortiNAC versions allows an admin user to escalate privileges to root through the sudo command.

Affected Systems and Versions

FortiNAC 8.8.8 and below
FortiNAC 9.1.2 and below

Exploitation Mechanism

The vulnerability can be exploited locally by an admin user through the use of the sudo command.

Mitigation and Prevention

Mitigation strategies to address CVE-2021-41021.

Immediate Steps to Take

Update FortiNAC to the latest version immediately
Monitor system logs for any suspicious activities
Restrict admin access to critical system functions
Implement the principle of least privilege

Long-Term Security Practices

Regularly audit and review user privileges
Conduct security training for system administrators
Apply security patches promptly

Patching and Updates

Fortinet has released patches to address this vulnerability
Follow vendor recommendations and apply patches promptly