CVE-2022-29958

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.09%
Third-Party Advisory cisa.gov Third-Party Advisory forescout.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.forescout.com/blog/ third party advisory
https://www.cisa.gov/uscert/ics/advisories/icsa-22-172-02 third party advisory us government resource

Frequently Asked Questions

What is the severity of CVE-2022-29958?
CVE-2022-29958 has been scored as a critical severity vulnerability.
How to fix CVE-2022-29958?
To fix CVE-2022-29958, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-29958 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-29958 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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