CVE-2018-20818 : Security Advisory and Response
Learn about CVE-2018-20818, a buffer overflow vulnerability in OpenPLC controller versions OpenPLC_v2 and OpenPLC_v3, potentially leading to PLC runtime crashes and other undesired consequences. Find mitigation steps and prevention measures.
OpenPLC controller vulnerability related to buffer overflow in versions OpenPLC_v2 and OpenPLC_v3.
Understanding CVE Information
What is CVE-2018-20818?
A buffer overflow vulnerability in the OpenPLC controller versions OpenPLC_v2 and OpenPLC_v3, specifically in the mapUnusedIO() function of modbus.cpp.
The Impact of CVE-2018-20818
This vulnerability can lead to a potential runtime crash of the PLC or other undesired consequences.
Technical Details of CVE-2018-20818
Vulnerability Description
The vulnerability is related to buffer overflow in the OpenPLC controller, affecting versions OpenPLC_v2 and OpenPLC_v3 in the mapUnusedIO() function of modbus.cpp.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: Not applicable
Exploitation Mechanism
The vulnerability can be exploited in the mapUnusedIO() function of modbus.cpp, potentially causing a runtime crash of the PLC or other unspecified impacts.
Mitigation and Prevention
Immediate Steps to Take
- Implement security patches provided by the vendor
- Monitor network traffic for any suspicious activities
- Restrict access to the affected systems
Long-Term Security Practices
- Regularly update and patch all software and firmware
- Conduct security assessments and penetration testing
- Educate users on cybersecurity best practices
Patching and Updates
Apply the latest patches and updates released by the vendor to address the buffer overflow vulnerability in the OpenPLC controller.