CVE-2018-7794 : Exploit Details and Defense Strategies
Learn about CVE-2018-7794, a CWE-754 vulnerability in Schneider Electric's Modicon M580, M340, Quantum, and Premium products, potentially leading to a Denial of Service through Modbus TCP exploitation. Find mitigation steps and prevention measures here.
The Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium (specific versions mentioned in the security notification) by Schneider Electric SE are vulnerable to a CWE-754 vulnerability, potentially leading to a Denial of Service when reading data with an invalid index using Modbus TCP.
Understanding CVE-2018-7794
This CVE identifies a specific vulnerability in Schneider Electric's Modicon series that could be exploited to cause a Denial of Service.
What is CVE-2018-7794?
CVE-2018-7794 is a CWE-754 vulnerability, indicating an Improper Check for Unusual or Exceptional Conditions in the affected Schneider Electric Modicon products.
The Impact of CVE-2018-7794
The vulnerability could allow attackers to disrupt services by reading data with an invalid index through Modbus TCP, potentially leading to a Denial of Service.
Technical Details of CVE-2018-7794
Schneider Electric's Modicon products are affected by a specific vulnerability that can be exploited under certain conditions.
Vulnerability Description
The vulnerability, identified as CWE-754, involves an improper check for unusual or exceptional conditions in the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium products.
Affected Systems and Versions
- Modicon M580
- Modicon M340
- Modicon Quantum
- Modicon Premium (specific versions mentioned in the security notification)
Exploitation Mechanism
The vulnerability can be exploited by reading data with an invalid index using Modbus TCP, potentially causing a Denial of Service.
Mitigation and Prevention
It is crucial to take immediate steps to address and prevent the exploitation of this vulnerability.
Immediate Steps to Take
- Apply security patches provided by Schneider Electric.
- Implement network segmentation to limit exposure.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Regularly update and patch all software and firmware.
- Conduct security assessments and penetration testing.
- Educate staff on cybersecurity best practices.
Patching and Updates
Ensure that all affected systems are updated with the latest security patches from Schneider Electric to mitigate the risk of exploitation.