CVE-2018-20818 Memory corruption in n/a
A buffer overflow in OpenPLC's modbus handler can crash the PLC, impacting industrial control system availability.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-20818?
CVE-2018-20818 is a critical memory corruption vulnerability in n/a, published on 21 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-119
Which versions are affected by CVE-2018-20818?
It affects 2 products.
Products include Openplcproject Openplc V2 Firmware, Openplcproject Openplc V3 Firmware.
How do I fix CVE-2018-20818?
No fix has been published for CVE-2018-20818 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2018-20818 being exploited?
There is no known exploitation of CVE-2018-20818 in the wild and no public exploit code.
Sources
Also known as GHSA-j22f-7hvx-mqp8.