# CVE-2023-22357: Missing authorization in CP1L-EL20DR-D

> Remote attackers can execute arbitrary commands and read/write memory on OMRON CP1L PLCs due to active debug code, leading to code execution or denial of service.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Jan 2023
- **Updated:** 4 Apr 2025
- **Also known as:** GHSA-rjg6-q2fh-x6mj

## What is CVE-2023-22357?

CVE-2023-22357 is a critical missing authorization vulnerability in OMRON Corporation CP1L-EL20DR-D, published on 17 Jan 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Active debug code exists in OMRON CP1L-EL20DR-D all versions, which may lead to a command that is not specified in FINS protocol being executed without authentication. A remote unauthenticated attacker may read/write in arbitrary area of the device memory, which may lead to overwriting the firmware, causing a denial-of-service (DoS) condition, and/or arbitrary code execution.

Weakness: CWE-489 (Active Debug Code)

## Which versions are affected by CVE-2023-22357?

It affects 1 product.


Products: Omron Cp1l-El20dr-D Firmware.

## How do I fix CVE-2023-22357?

No fix has been published for CVE-2023-22357 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-22357 being exploited?

There is no known exploitation of CVE-2023-22357 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-22357 and fix it if it is affected.

What it is: CVE-2023-22357 is a critical missing authorization vulnerability in OMRON Corporation CP1L-EL20DR-D, published on 17 Jan 2023. 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-2023-22357 in the wild and no public exploit code.

Affected product: OMRON Corporation CP1L-EL20DR-D. 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-2023-22357/ (Markdown: https://insights.sbomify.com/CVE-2023-22357/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-22357
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-22357
- OSV: https://osv.dev/vulnerability/CVE-2023-22357

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-22357/
Summaries are generated and may contain mistakes; the official description above is the record.