JTEKT TOYOPUC PLCs through 2022-04-29 do not ensure data integrity. They utilize the unauthenticated CMPLink/TCP protocol for engineering purposes, including downloading projects and control logic to the PLC. Control logic is downloaded to the PLC on a block-by-block basis with a given memory address and a blob of machine code. The logic that is downloaded to the PLC is not cryptographically authenticated, allowing an attacker to execute arbitrary machine code on the PLC's CPU module in the context of the runtime. In the case of the PC10G-CPU, and likely for other CPU modules of the TOYOPUC family, a processor without MPU or MMU is used and this no memory protection or privilege-separation capabilities are available, giving an attacker full control over the CPU.

Project Subscriptions

Vendors Products
Nano 10gx Tuc-1157 Subscribe
Nano 10gx Tuc-1157 Firmware Subscribe
Nano Cpu Tuc-6941 Subscribe
Nano Cpu Tuc-6941 Firmware Subscribe
Pc10b-p Tcc-6373 Subscribe
Pc10b-p Tcc-6373 Firmware Subscribe
Pc10b Tcc-1021 Subscribe
Pc10b Tcc-1021 Firmware Subscribe
Pc10e Tcc-4737 Subscribe
Pc10e Tcc-4737 Firmware Subscribe
Pc10el Tcc-4747 Subscribe
Pc10el Tcc-4747 Firmware Subscribe
Pc10g-cpu Tcc-6353 Subscribe
Pc10g-cpu Tcc-6353 Firmware Subscribe
Pc10ge Tcc-6464 Subscribe
Pc10ge Tcc-6464 Firmware Subscribe
Pc10p-dp-io Tcc-6752 Subscribe
Pc10p-dp-io Tcc-6752 Firmware Subscribe
Pc10p-dp Tcc-6726 Subscribe
Pc10p-dp Tcc-6726 Firmware Subscribe
Pc10p Tcc-6372 Subscribe
Pc10p Tcc-6372 Firmware Subscribe
Pc10pe-1616p Tcc-1102 Subscribe
Pc10pe-1616p Tcc-1102 Firmware Subscribe
Pc10pe Tcc-1101 Subscribe
Pc10pe Tcc-1101 Firmware Subscribe
Pc3jx-d Tcc-6902 Subscribe
Pc3jx-d Tcc-6902 Firmware Subscribe
Pc3jx Tcc-6901 Subscribe
Pc3jx Tcc-6901 Firmware Subscribe
Pcdl Tkc-6688 Subscribe
Pcdl Tkc-6688 Firmware Subscribe
Plus Cpu Tcc-6740 Subscribe
Plus Cpu Tcc-6740 Firmware Subscribe
Advisories
Source ID Title
EUVD EUVD EUVD-2022-34265 JTEKT TOYOPUC PLCs through 2022-04-29 do not ensure data integrity. They utilize the unauthenticated CMPLink/TCP protocol for engineering purposes, including downloading projects and control logic to the PLC. Control logic is downloaded to the PLC on a block-by-block basis with a given memory address and a blob of machine code. The logic that is downloaded to the PLC is not cryptographically authenticated, allowing an attacker to execute arbitrary machine code on the PLC's CPU module in the context of the runtime. In the case of the PC10G-CPU, and likely for other CPU modules of the TOYOPUC family, a processor without MPU or MMU is used and this no memory protection or privilege-separation capabilities are available, giving an attacker full control over the CPU.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

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Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-03T06:33:43.188Z

Reserved: 2022-04-29T00:00:00

Link: CVE-2022-29958

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-07-26T22:15:10.963

Modified: 2024-11-21T07:00:03.713

Link: CVE-2022-29958

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses