CVE-2021-31853 : Security Advisory and Response

A detailed overview of the DLL Search Order Hijacking vulnerability in McAfee Drive Encryption (MDE) and its impact.

Understanding CVE-2021-31853

This section delves into the nature and consequences of the CVE-2021-31853 vulnerability in McAfee Drive Encryption (MDE).

What is CVE-2021-31853?

The CVE-2021-31853, a DLL Search Order Hijacking Vulnerability, exists in McAfee Drive Encryption (MDE) versions prior to 7.3.0 HF2 (7.3.0.183). It permits local users to execute arbitrary code and escalate privileges by running programs from a compromised directory.

The Impact of CVE-2021-31853

The vulnerability poses a significant threat, with a CVSSv3.1 base score of 7.8 (High). It can result in local attackers gaining high access to confidential information, system integrity compromise, and heightened availability impact.

Technical Details of CVE-2021-31853

Explore the specific technical aspects related to CVE-2021-31853 affecting McAfee Drive Encryption (MDE).

Vulnerability Description

The vulnerability stems from uncontrolled search path elements, categorized under CWE-427. It specifically impacts McAfee Drive Encryption (MDE) versions preceding 7.3.0 HF2.

Affected Systems and Versions

McAfee Drive Encryption (MDE) versions less than 7.3.0 HF2 are vulnerable to this issue, with an unspecified custom version type.

Exploitation Mechanism

The attack vector for this vulnerability is local, with low attack complexity and required privileges. The execution from a compromised folder enables the exploitation of arbitrary code by threat actors.

Mitigation and Prevention

Discover the necessary steps to mitigate and prevent the CVE-2021-31853 vulnerability in McAfee Drive Encryption (MDE).

Immediate Steps to Take

Users should promptly update their McAfee Drive Encryption (MDE) installations to version 7.3.0 HF2 or a higher non-vulnerable release. Avoid executing programs from untrusted or compromised directories to reduce the risk of exploitation.

Long-Term Security Practices

Maintain a robust security posture by continuously monitoring for updates and patches from McAfee. Employ strict access controls and user permissions to limit the impact of potential privilege escalation.

Patching and Updates

Regularly check for security advisories and CVE notifications from McAfee to stay informed about patches and updates to address vulnerabilities like CVE-2021-31853.