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CRITICAL · 9.8

CVE-2018-20818

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...

Vulnerability 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.

CVSS Score

9.8

CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
OpenplcprojectOpenplc V2 Firmware-
OpenplcprojectOpenplc V2-
OpenplcprojectOpenplc V3 Firmware-
OpenplcprojectOpenplc V3-

Related Weaknesses (CWE)

CWE-119

References

FAQ

What is CVE-2018-20818?

CVE-2018-20818 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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...

How severe is CVE-2018-20818?

CVE-2018-20818 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2018-20818?

Check the references section above for vendor advisories and patch information. Affected products include: Openplcproject Openplc V2 Firmware, Openplcproject Openplc V2, Openplcproject Openplc V3 Firmware, Openplcproject Openplc V3.