CVE-2019-6809 : Exploit Details and Defense Strategies

The Modicon M580, Modicon M340, Modicon Premium, and Modicon Quantum by Schneider Electric SE are affected by a CWE-248 vulnerability leading to a denial of service risk.

Understanding CVE-2019-6809

This CVE identifies a vulnerability in multiple Schneider Electric products that could potentially result in a denial of service situation.

What is CVE-2019-6809?

The vulnerability in Modicon M580, M340, Premium, and Quantum allows attackers to trigger a denial of service by attempting to read invalid data from the controller.

The Impact of CVE-2019-6809

Exploiting this vulnerability could lead to a denial of service condition, affecting the availability of the affected systems and potentially disrupting critical operations.

Technical Details of CVE-2019-6809

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The CWE-248 vulnerability in the specified Schneider Electric products allows for an uncaught exception, potentially leading to a denial of service scenario.

Affected Systems and Versions

Modicon M580: Firmware versions prior to V2.90
Modicon M340: Firmware versions prior to V3.10
Modicon Premium: All versions
Modicon Quantum: All versions

Exploitation Mechanism

Attackers can exploit this vulnerability by attempting to read invalid data from the controller, triggering a denial of service condition.

Mitigation and Prevention

Protecting systems from CVE-2019-6809 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly to mitigate the vulnerability.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activity that could indicate exploitation attempts.

Long-Term Security Practices

Regularly update and patch all software and firmware to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate weaknesses proactively.
Educate personnel on cybersecurity best practices to enhance overall security posture.

Patching and Updates

Schneider Electric may release patches or updates to address the CWE-248 vulnerability. Stay informed about security advisories and apply patches as soon as they are available.