CVE-2021-27477
Last modified
CVE-2021-27477 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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 2ET,PC10PE, PC10PE-16/16P, PC10E, FL/ET-T-V2H, PC10B,PC10B-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.. EPSS estimates a 1.13% chance of exploitation in the next 30 days.
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 2ET,PC10PE, PC10PE-16/16P, PC10E, FL/ET-T-V2H, PC10B,PC10B-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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Jtekt | Pc10g-Cpu Firmware | < 3.91 |
| Jtekt | 2port-Efr Firmware | < 1.50 |
| Jtekt | Plus Cpu Firmware | < 3.11 |
| Jtekt | Plus Ex Firmware | < 3.11 |
| Jtekt | Plus Ex2 Firmware | < 3.11 |
| Jtekt | Plus Efr Firmware | < 3.11 |
| Jtekt | Plus Efr2 Firmware | < 3.11 |
| Jtekt | Plus 2p-Efr Firmware | < 3.11 |
| Jtekt | Pc10p-Dp Firmware | < 1.50 |
| Jtekt | Pc10p-Dp-Io Firmware | < 1.50 |
| Jtekt | Plus Bus-Ex Firmware | < 2.13 |
| Jtekt | Nano 10gx Firmware | < 3.00 |
| Jtekt | Nano 2et Firmware | < 2.40 |
| Jtekt | Pc10pe Firmware | < 1.02 |
| Jtekt | Pc10pe-16\/16p Firmware | < 1.02 |
| Jtekt | Pc10e Firmware | < 1.02 |
| Jtekt | Fl\/Et-T-V2h Firmware | < f2.8_e1.5 |
| Jtekt | Pc10b Firmware | < 1.11 |
| Jtekt | Pc10b-P Firmware | < 1.11 |
| Jtekt | Nano Cpu Firmware | < 2.08 |
| Jtekt | Pc10p Firmware | < 1.05 |
| Jtekt | Pc10ge Firmware | < 1.04 |
References
- https://us-cert.cisa.gov/ics/advisories/icsa-21-180-04Third Party Advisory, US Government Resource
- https://us-cert.cisa.gov/ics/advisories/icsa-21-180-04Third Party Advisory, US Government Resource
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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