CVE-2019-6859 : Exploit Details and Defense Strategies

Modicon Controllers are affected by a CWE-798 vulnerability that exposes hardcoded credentials, potentially leading to FTP credential disclosure when the controller's Web server is used on an insecure network.

Understanding CVE-2019-6859

This CVE involves a vulnerability in Modicon Controllers that could result in the exposure of FTP hardcoded credentials.

What is CVE-2019-6859?

The CWE-798 vulnerability in Modicon Controllers allows for the exploitation of hardcoded credentials, impacting all versions of the CPUs and Communication Module product references listed in the Security Notifications.

The Impact of CVE-2019-6859

The vulnerability can lead to the disclosure of FTP hardcoded credentials when the controller's Web server is accessed on an insecure network.

Technical Details of CVE-2019-6859

Modicon Controllers are susceptible to the following technical aspects:

Vulnerability Description

CWE-798: Use of Hardcoded Credentials

Affected Systems and Versions

All versions of the CPUs and Communication Module product references listed in the Security Notifications

Exploitation Mechanism

Exposure of FTP hardcoded credentials when the controller's Web server is used on an insecure network

Mitigation and Prevention

To address CVE-2019-6859, consider the following steps:

Immediate Steps to Take

Disable the controller's Web server if not essential
Implement network segmentation to isolate critical systems
Regularly monitor and audit FTP access and usage

Long-Term Security Practices

Implement strong password policies and avoid hardcoded credentials
Conduct regular security assessments and penetration testing
Stay informed about security updates and patches

Patching and Updates

Apply security patches provided by the vendor
Keep the Modicon Controllers firmware up to date