### [CVE-2018-20818](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20818)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

A buffer overflow vulnerability was discovered in the OpenPLC controller, in the OpenPLC_v2 and OpenPLC_v3 versions. It occurs in the modbus.cpp mapUnusedIO() function, which can cause a runtime crash of the PLC or possibly have unspecified other impact.

### POC

#### Reference
- https://arxiv.org/pdf/1809.07477
- https://arxiv.org/pdf/1809.07477

#### Github
No PoCs found on GitHub currently.