CVEvulnerability

CVE-2022-29958

9.8 CRITICAL Published 2022-07-26 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2022-07-26
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-345

Description

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.

Affected configurations

• jtekt pc10g-cpu tcc-6353 firmware • jtekt pc10ge tcc-6464 firmware • jtekt pc10p tcc-6372 firmware • jtekt pc10p-dp tcc-6726 firmware • jtekt pc10p-dp-io tcc-6752 firmware • jtekt pc10b-p tcc-6373 firmware • jtekt pc10b tcc-1021 firmware • jtekt pc10e tcc-4737 firmware • jtekt pc10el tcc-4747 firmware • jtekt plus cpu tcc-6740 firmware • jtekt pc3jx tcc-6901 firmware • jtekt pc3jx-d tcc-6902 firmware • jtekt pc10pe tcc-1101 firmware • jtekt pc10pe-1616p tcc-1102 firmware • jtekt pcdl tkc-6688 firmware • jtekt nano 10gx tuc-1157 firmware • jtekt nano cpu tuc-6941 firmware

Related

Weakness · CWE (1)

  • CWE-345 Insufficient Verification of Data Authenticity weakness

References