# OMRON Corporation CJ2M CPU Unit: Denial-of-service (DoS) vulnerability due to improper validation of specified type of…

CVE record · `CVE-2023-38744`

- **Identifiers:** `CVE-2023-38744`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** jpcert
- **Weakness (CWE):** [CWE-1284](https://cwe.mitre.org/data/definitions/1284.html)
- **Tags:** [CWE-1284](https://agentprime.io/advisories/tag/cwe-1284.md)
- **Technologies:** [OMRON Corporation CJ2M CPU Unit](https://agentprime.io/advisories/technology/omron-corporation-cj2m-cpu-unit.md) · [OMRON Corporation CJ2H CPU Unit](https://agentprime.io/advisories/technology/omron-corporation-cj2h-cpu-unit.md) · [OMRON Corporation CS/CJ Series EtherNet/IP Unit](https://agentprime.io/advisories/technology/omron-corporation-cs-cj-series-ethernet-ip-unit.md)
- **Published:** 3 Aug 2023
- **Updated:** 17 Oct 2024
- **Reviewed by a person:** No

Published by the CVE Program (CNA: jpcert) at 3 Aug 2023, 04:55 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: OMRON Corporation. Product: CJ2M CPU Unit.
  - affected: `CJ2M-CPU3[] Unit version of the built-in EtherNet/IP section Ver. 2.18 and earlier`
- Vendor: OMRON Corporation. Product: CJ2H CPU Unit.
  - affected: `CJ2H-CPU6[]-EIP Unit version of the built-in EtherNet/IP section Ver. 3.04 and earlier`
- Vendor: OMRON Corporation. Product: CS/CJ Series EtherNet/IP Unit.
  - affected: `CS1W-EIP21 V3.04 and earlier`
- Vendor: OMRON Corporation. Product: CS/CJ Series EtherNet/IP Unit.
  - affected: `CJ1W-EIP21 V3.04 and earlier`

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0087, the 58th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 3 Aug 2023. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2023-38744](https://www.cve.org/CVERecord?id=CVE-2023-38744)
- [NVD: CVE-2023-38744](https://nvd.nist.gov/vuln/detail/CVE-2023-38744)

### References from the CNA

- <https://www.ia.omron.com/product/vulnerability/OMSR-2023-006_en.pdf>
- <https://jvn.jp/en/vu/JVNVU92193064/>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2023-38744>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2023-38744/>. Everything for agents: <https://agentprime.io/llms.txt>.