CVE-2020-7537 : Vulnerability Insights and Analysis
Learn about the CWE-754 vulnerability in Modicon M580, M340, Quantum & Premium controllers, potentially leading to denial of service. Find mitigation steps and prevention measures here.
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 Read Physical Memory request over Modbus is sent.
Understanding CVE-2020-7537
This CVE involves an Improper Check for Unusual or Exceptional Conditions vulnerability in Schneider Electric's Modicon devices.
What is CVE-2020-7537?
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-2020-7537
The vulnerability could lead to a denial of service condition on the affected devices, potentially disrupting critical operations and services.
Technical Details of CVE-2020-7537
This section provides more technical insights into the CVE.
Vulnerability Description
The CWE-754 vulnerability allows attackers to cause denial of service by sending a specific Read Physical Memory request over Modbus to the controller.
Affected Systems and Versions
- Modicon M580
- Modicon M340
- Legacy Controllers Modicon Quantum & Modicon Premium
Exploitation Mechanism
Attackers can exploit this vulnerability by sending a specially crafted Read Physical Memory request over Modbus to the affected controllers.
Mitigation and Prevention
Protecting systems from CVE-2020-7537 is crucial to maintaining security.
Immediate Steps to Take
- Apply security patches provided by Schneider Electric promptly.
- Implement network segmentation to limit exposure of vulnerable devices.
- Monitor network traffic for any suspicious activity targeting Modicon devices.
Long-Term Security Practices
- Regularly update and patch all industrial control systems.
- Conduct security assessments and penetration testing to identify and address vulnerabilities.
- Educate personnel on cybersecurity best practices to enhance overall security posture.
Patching and Updates
Ensure that all affected Modicon devices are updated with the latest security patches to mitigate the risk of exploitation.