CVE-2019-3635 : What You Need to Know

A Cross-Frame Scripting vulnerability in McAfee Web Gateway (MWG) versions before 7.8.2.12 allows attackers to access sensitive data by creating a malicious webpage.

Understanding CVE-2019-3635

This CVE involves a security flaw in McAfee Web Gateway (MWG) that could lead to data exfiltration.

What is CVE-2019-3635?

CVE-2019-3635 is a Cross-Frame Scripting vulnerability in MWG versions prior to 7.8.2.12, enabling attackers to extract sensitive information through a crafted webpage.

The Impact of CVE-2019-3635

CVSS Base Score: 4.3 (Medium Severity)
Attack Vector: Network
Attack Complexity: Low
User Interaction: Required
Confidentiality Impact: Low
Integrity Impact: None
Privileges Required: None
Scope: Unchanged
Availability Impact: None

Technical Details of CVE-2019-3635

This section delves into the specifics of the vulnerability.

Vulnerability Description

Attackers can exploit this vulnerability to retrieve sensitive data by tricking the Web Gateway into blocking user access to an iframe.

Affected Systems and Versions

Product: McAfee Web Gateway (MWG)
Vendor: McAfee, LLC
Affected Versions: 7.8.2.x (before 7.8.2.12)

Exploitation Mechanism

The vulnerability is triggered by creating a complex webpage that prompts the Web Gateway to restrict user access to an iframe.

Mitigation and Prevention

Protecting systems from CVE-2019-3635 is crucial to prevent data breaches.

Immediate Steps to Take

Update McAfee Web Gateway to version 7.8.2.12 or later.
Monitor network traffic for any suspicious activities.
Implement web filtering rules to block potentially harmful content.

Long-Term Security Practices

Regularly update and patch all software and security solutions.
Conduct security training for employees to recognize and report phishing attempts.

Patching and Updates

Apply security patches provided by McAfee promptly.