CVE-2021-23880 : What You Need to Know

A detailed overview of CVE-2021-23880, highlighting the vulnerability found in McAfee Endpoint Security (ENS) for Windows prior to version 10.7.0 February 2021.

Understanding CVE-2021-23880

This section delves into the specifics of the vulnerability, its impact, technical details, and mitigation strategies.

What is CVE-2021-23880?

The CVE-2021-23880 vulnerability revolves around Improper Access Control in McAfee Endpoint Security (ENS) for Windows. It allows an authenticated local administrator user to uninstall the anti-malware engine using a specific command with correct parameters.

The Impact of CVE-2021-23880

With a CVSS base score of 6.7 (Medium severity), the vulnerability poses a significant risk due to high confidentiality and integrity impacts. Attackers with local access can exploit this flaw to dismantle the anti-malware engine.

Technical Details of CVE-2021-23880

This section outlines the technical aspects of the vulnerability, including its description, affected systems, versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability arises from improper access control in the ENS installer, specifically in versions prior to 10.7.0 February 2021. This enables local administrators to uninstall the anti-malware engine through a precise command execution.

Affected Systems and Versions

McAfee Endpoint Security (ENS) for Windows versions earlier than 10.7.0 February 2021 are impacted by this vulnerability. The custom version 10.7.x is particularly susceptible to exploitation.

Exploitation Mechanism

For successful exploitation, an authenticated local administrator user needs to run a specific command with the correct parameters, allowing them to conduct an unauthorized uninstallation of the anti-malware engine.

Mitigation and Prevention

In this section, we focus on immediate steps to take, long-term security practices, and the importance of patching and updates to address CVE-2021-23880.

Immediate Steps to Take

Immediately update McAfee Endpoint Security (ENS) for Windows to version 10.7.0 February 2021 or later to mitigate the vulnerability. Restricting access to critical system components can also enhance security posture.

Long-Term Security Practices

Regularly monitor privilege management controls, enforce the principle of least privilege, and conduct security awareness training to prevent similar vulnerabilities in the future.

Patching and Updates

Routine patch management is crucial. Stay updated with security advisories from McAfee and promptly apply patches to protect against known vulnerabilities and strengthen overall security.