Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2022-29958

Severity CVSS v4.0:
Pending analysis
Type:
CWE-345 Insufficient Verification of Data Authenticity
Publication date:
26/07/2022
Last modified:
03/08/2022

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.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.80 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
9.80
Severity 3.x
CRITICAL

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:jtekt:pc10g-cpu_tcc-6353_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:jtekt:pc10g-cpu_tcc-6353:-:*:*:*:*:*:*:*
cpe:2.3:o:jtekt:pc10ge_tcc-6464_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:jtekt:pc10ge_tcc-6464:-:*:*:*:*:*:*:*
cpe:2.3:o:jtekt:pc10p_tcc-6372_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:jtekt:pc10p_tcc-6372:-:*:*:*:*:*:*:*
cpe:2.3:o:jtekt:pc10p-dp_tcc-6726_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:jtekt:pc10p-dp_tcc-6726:-:*:*:*:*:*:*:*
cpe:2.3:o:jtekt:pc10p-dp-io_tcc-6752_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:jtekt:pc10p-dp-io_tcc-6752:-:*:*:*:*:*:*:*
cpe:2.3:o:jtekt:pc10b-p_tcc-6373_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:jtekt:pc10b-p_tcc-6373:-:*:*:*:*:*:*:*
cpe:2.3:o:jtekt:pc10b_tcc-1021_firmware:-:*:*:*:*:*:*:*
cpe:2.3:h:jtekt:pc10b_tcc-1021:-:*:*:*:*:*:*:*
cpe:2.3:o:jtekt:pc10e_tcc-4737_firmware:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools