What is the CVSS score of CVE-2022-29958?

CVE-2022-29958 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.5%.

Pc10G Cpu Tcc 6353 Firmware CVE-2022-29958

CRITICAL

Insufficient Verification of Data Authenticity (CWE-345)

2022-07-26 cve@mitre.org

RCE Pc10G Cpu Tcc 6353 Firmware Pc10Ge Tcc 6464 Firmware Pc10P Tcc 6372 Firmware Pc10P Dp Tcc 6726 Firmware Pc10P Dp Io Tcc 6752 Firmware Pc10B P Tcc 6373 Firmware Pc10B Tcc 1021 Firmware Pc10E Tcc 4737 Firmware Pc10El Tcc 4747 Firmware Plus Cpu Tcc 6740 Firmware Pc3Jx Tcc 6901 Firmware Pc3Jx D Tcc 6902 Firmware Pc10Pe Tcc 1101 Firmware Pc10Pe 1616P Tcc 1102 Firmware Pcdl Tkc 6688 Firmware Nano 10Gx Tuc 1157 Firmware Nano Cpu Tuc 6941 Firmware

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Jul 26, 2022 - 22:15 nvd

CRITICAL 9.8

DescriptionNVD

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.

AnalysisAI

JTEKT TOYOPUC PLCs through 2022-04-29 do not ensure data integrity. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-345. 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 products include: 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. Version information: through 2022.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.