CVE-2021-27477 Information

Description

When JTEKT Corporation TOYOPUC PLC versions PC10G-CPU 2PORT-EFR Plus CPU Plus EX Plus EX2 Plus EFR Plus EFR2 Plus 2P-EFR PC10P-DP PC10P-DP-IO Plus BUS-EX Nano 10GX Nano 2ETPC10PE PC10PE-16/16P PC10E FL/ET-T-V2H PC10BPC10B-P Nano CPU PC10P and PC10GE receive an invalid frame the outside area of a receive buffer for FL-net are overwritten. As a result the PLC CPU detects a system error and the affected products stop.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

https://us-cert.cisa.gov/ics/advisories/icsa-21-180-04

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5