CVE-2020-7543 : Security Advisory and Response
Discover the CWE-754 vulnerability in Schneider Electric's Modicon M580, M340, Quantum & Premium devices, potentially leading to denial of service. Learn about impacts, affected systems, and mitigation steps.
A CWE-754 vulnerability exists in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium, potentially leading to denial of service when a specially crafted request is sent over Modbus.
Understanding CVE-2020-7543
This CVE involves an Improper Check for Unusual or Exceptional Conditions vulnerability in Schneider Electric's Modicon devices.
What is CVE-2020-7543?
The vulnerability in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium could be exploited through a specially crafted Read Physical Memory request over Modbus, resulting in a denial of service.
The Impact of CVE-2020-7543
The vulnerability could allow attackers to disrupt the operation of affected devices, potentially leading to downtime and operational issues.
Technical Details of CVE-2020-7543
This section provides more technical insights into the vulnerability.
Vulnerability Description
The CWE-754 vulnerability arises from an improper check for unusual or exceptional conditions in the affected Schneider Electric devices.
Affected Systems and Versions
- Products: Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium
- Versions: Refer to security notifications for the specific affected versions.
Exploitation Mechanism
The vulnerability can be exploited by sending a specially crafted Read Physical Memory request over Modbus to the controller, triggering a denial of service.
Mitigation and Prevention
Protecting systems from CVE-2020-7543 is crucial to maintaining security.
Immediate Steps to Take
- Apply security patches provided by Schneider Electric promptly.
- Implement network segmentation to limit the impact of potential attacks.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Conduct regular security assessments and audits on industrial control systems.
- Educate staff on cybersecurity best practices and awareness.
Patching and Updates
Regularly check for security advisories and updates from Schneider Electric to ensure systems are protected against known vulnerabilities.