Strix
26.1K

CVE-2022-29958

CRITICALCVSS 9.8/10EPSS 0.47%

Last modified

CVE-2022-29958 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 0.47% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.8/10

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

EPSS Probability
0.47%

36.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
JtektPc10g-Cpu Tcc-6353 FirmwareAll versions
JtektPc10ge Tcc-6464 FirmwareAll versions
JtektPc10p Tcc-6372 FirmwareAll versions
JtektPc10p-Dp Tcc-6726 FirmwareAll versions
JtektPc10p-Dp-Io Tcc-6752 FirmwareAll versions
JtektPc10b-P Tcc-6373 FirmwareAll versions
JtektPc10b Tcc-1021 FirmwareAll versions
JtektPc10e Tcc-4737 FirmwareAll versions
JtektPc10el Tcc-4747 FirmwareAll versions
JtektPlus Cpu Tcc-6740 FirmwareAll versions
JtektPc3jx Tcc-6901 FirmwareAll versions
JtektPc3jx-D Tcc-6902 FirmwareAll versions
JtektPc10pe Tcc-1101 FirmwareAll versions
JtektPc10pe-1616p Tcc-1102 FirmwareAll versions
JtektPcdl Tkc-6688 FirmwareAll versions
JtektNano 10gx Tuc-1157 FirmwareAll versions
JtektNano Cpu Tuc-6941 FirmwareAll versions

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2022-29958?
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.
How severe is CVE-2022-29958?
CVE-2022-29958 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.
How do I fix CVE-2022-29958?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-29958?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST