CVE-2019-6857 : Vulnerability Insights and Analysis
Discover the CWE-754 vulnerability in Schneider Electric's Modicon M580, M340, Quantum, Premium devices, potentially leading to a Denial of Service. Learn about the impact, affected systems, exploitation, and mitigation steps.
Modicon M580, Modicon M340, Modicon Quantum, Modicon Premium are affected by a CWE-754 vulnerability that could result in a Denial of Service when reading specific memory blocks using Modbus TCP.
Understanding CVE-2019-6857
This CVE involves a vulnerability in Schneider Electric's Modicon series that could lead to a controller's Denial of Service.
What is CVE-2019-6857?
CVE-2019-6857 is a CWE-754 vulnerability affecting Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium devices. The vulnerability arises when attempting to read certain memory blocks using Modbus TCP, potentially causing a Denial of Service.
The Impact of CVE-2019-6857
The vulnerability could allow malicious actors to disrupt the operation of affected controllers, leading to service denial and potential operational downtime.
Technical Details of CVE-2019-6857
Schneider Electric's Modicon series is susceptible to a specific vulnerability.
Vulnerability Description
The CWE-754 vulnerability in Modicon M580, M340, Quantum, and Premium devices arises from an improper check for unusual or exceptional conditions, potentially leading to a Denial of Service.
Affected Systems and Versions
- Modicon M580
- Modicon M340
- Modicon Quantum
- Modicon Premium (specific versions detailed in the security notification)
Exploitation Mechanism
The vulnerability is exploited by attempting to read specific memory blocks using Modbus TCP, triggering the Denial of Service condition.
Mitigation and Prevention
To address CVE-2019-6857, immediate steps and long-term security practices are recommended.
Immediate Steps to Take
- Apply security patches provided by Schneider Electric promptly.
- Implement network segmentation to isolate vulnerable devices.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Regularly update and patch all industrial control systems.
- Conduct security assessments and audits to identify vulnerabilities.
- Train personnel on cybersecurity best practices.
Patching and Updates
- Stay informed about security advisories from Schneider Electric.
- Apply firmware updates and security patches as soon as they are released.