CVE-2019-3586 Explained : Impact and Mitigation

McAfee Endpoint Security (ENS) 10.x prior to the May 2019 update is vulnerable to a firewall issue that can be exploited by attackers. This CVE-2019-3586 vulnerability allows attackers to bypass ENS protection when the firewall fails to block IP addresses flagged by GTI.

Understanding CVE-2019-3586

This CVE involves a vulnerability in the McAfee Endpoint Security (ENS) firewall that could be exploited by attackers with contextual knowledge.

What is CVE-2019-3586?

The vulnerability in McAfee Endpoint Security (ENS) 10.x before the May 2019 update allows attackers to bypass the ENS protection by manipulating GTI flagged IP addresses.

The Impact of CVE-2019-3586

The vulnerability has a CVSS base score of 7.5 (High) with a significant impact on availability. Attackers can exploit this issue to create malicious websites that trick the ENS Firewall into not blocking connections.

Technical Details of CVE-2019-3586

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The firewall in McAfee Endpoint Security (ENS) 10.x before the May 2019 update fails to block IP addresses flagged by GTI, allowing attackers to bypass ENS protection.

Affected Systems and Versions

Product: McAfee Endpoint Security (ENS)
Vendor: McAfee, LLC
Versions affected: All versions of 10.x before the May 2019 update

Exploitation Mechanism

Attackers can exploit this vulnerability by creating malicious websites that manipulate the GTI reputation to deceive the ENS Firewall into not blocking connections.

Mitigation and Prevention

Protecting systems from CVE-2019-3586 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update McAfee Endpoint Security (ENS) to version 10.6.1 May 2019 update or later.
Monitor network traffic for any suspicious activities.
Implement additional firewall rules to mitigate potential risks.

Long-Term Security Practices

Regularly update security patches and software versions.
Conduct security awareness training to educate users on potential threats.

Patching and Updates

Apply security patches promptly to ensure systems are protected against known vulnerabilities.