Buffer overflow

A buffer overflow vulnerability was discovered in the OpenPLC controller, in the OpenPLCv2 and OpenPLCv3 versions. It occurs in the modbus.cpp mapUnusedIO function, which can cause a runtime crash of the PLC or possibly have unspecified other impact...

CVE-2018-20818

A buffer overflow vulnerability was discovered in the OpenPLC controller, in the OpenPLCv2 and OpenPLCv3 versions. It occurs in the modbus.cpp mapUnusedIO function, which can cause a runtime crash of the PLC or possibly have unspecified other impact...

Schneider Modicon Remote START/STOP Command

The Schneider Modicon with Unity series of PLCs use Modbus function code 90 0x5a to perform administrative commands without authentication. This module allows a remote user to change the state of the PLC between STOP and RUN, allowing an attacker to end process control by the PLC. This module is...