CVE-2019-3591 Explained : Impact and Mitigation

McAfee Data Loss Prevention (DLPe) for Windows 11.x prior to 11.3.0 is vulnerable to Cross-site Scripting (XSS) attacks through the ePO extension.

Understanding CVE-2019-3591

This CVE involves a security vulnerability in the ePO extension of McAfee Data Loss Prevention (DLPe) for Windows 11.x versions before 11.3.0.

What is CVE-2019-3591?

The vulnerability in the ePO extension allows an unauthenticated remote user to execute specially crafted JavaScript in the ePO user interface by uploading a specific file to a remote website, triggering a Cross-site Scripting (XSS) attack.

The Impact of CVE-2019-3591

CVSS Base Score: 3.9 (Low)
Attack Vector: Local
Attack Complexity: Low
User Interaction: Required
Confidentiality, Integrity, and Availability Impact: Low

Technical Details of CVE-2019-3591

The technical details of the CVE-2019-3591 vulnerability are as follows:

Vulnerability Description

The vulnerability is due to improper neutralization of input during web page generation, leading to XSS attacks in the ePO user interface.

Affected Systems and Versions

Product: Data Loss Prevention ePO extension
Vendor: McAfee, LLC
Affected Versions: 11.x (prior to 11.3.0)

Exploitation Mechanism

The XSS vulnerability can be exploited by uploading a specially crafted file to a remote website, which triggers the execution of malicious JavaScript in the ePO UI.

Mitigation and Prevention

To address CVE-2019-3591, consider the following steps:

Immediate Steps to Take

Update McAfee Data Loss Prevention to version 11.3.0 or higher.
Monitor and restrict access to the ePO user interface.

Long-Term Security Practices

Regularly review and update security policies and configurations.
Educate users on safe browsing practices and potential security risks.

Patching and Updates

Apply security patches and updates provided by McAfee to mitigate the vulnerability.