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

> Attackers can brute-force Omron FINS authentication to access protected memory and overwrite programmed logic in CJ and CS series PLCs.

- **Severity:** High 8.6 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Jan 2024
- **Updated:** 13 Nov 2024
- **Also known as:** GHSA-c7q6-prxw-fgx7

## What is CVE-2022-45790?

CVE-2022-45790 is a high-severity authentication bypass vulnerability in Omron CJ-series and CS-series CPU modules, published on 22 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2022-45790?

It affects 46 products.


Products: Omron Cj1g-Cpu42p Firmware, Omron Cj1g-Cpu43p Firmware, Omron Cj1g-Cpu44p Firmware, Omron Cj1g-Cpu45p-Gtc Firmware, Omron Cj1g-Cpu45p Firmware, Omron Cj2h-Cpu64-Eip Firmware, Omron Cj2h-Cpu64 Firmware, Omron Cj2h-Cpu65-Eip Firmware, Omron Cj2h-Cpu65 Firmware, Omron Cj2h-Cpu66-Eip Firmware, Omron Cj2h-Cpu66 Firmware, Omron Cj2h-Cpu67-Eip Firmware, Omron Cj2h-Cpu67 Firmware, Omron Cj2h-Cpu68-Eip Firmware, Omron Cj2h-Cpu68 Firmware, Omron Cj2m-Cpu11 Firmware, Omron Cj2m-Cpu12 Firmware, Omron Cj2m-Cpu13 Firmware, Omron Cj2m-Cpu14 Firmware, Omron Cj2m-Cpu15 Firmware and 26 more.

## How do I fix CVE-2022-45790?

No fix has been published for CVE-2022-45790 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-45790 being exploited?

There is no known exploitation of CVE-2022-45790 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-45790 and fix it if it is affected.

What it is: CVE-2022-45790 is a high-severity authentication bypass vulnerability in Omron CJ-series and CS-series CPU modules, published on 22 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-45790 in the wild and no public exploit code.

Affected product: Omron CJ-series and CS-series CPU modules. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2022-45790/ (Markdown: https://insights.sbomify.com/CVE-2022-45790/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-45790
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-45790
- OSV: https://osv.dev/vulnerability/CVE-2022-45790

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-45790/
Summaries are generated and may contain mistakes; the official description above is the record.