# CVE-2023-31412: Weak cryptography in LMS5xx

> Weak hash generation in SICK LMS5xx allows attackers to potentially retrieve passwords via collision attacks if hashes are exposed.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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:** 24 Aug 2023
- **Updated:** 1 Jun 2026
- **Also known as:** GHSA-9pmh-r27r-8vx3

## What is CVE-2023-31412?

CVE-2023-31412 is a high-severity vulnerability in SICK AG LMS5xx, published on 24 Aug 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The LMS5xx uses weak hash generation methods, resulting in the creation of insecure hashs. If an attacker manages to retrieve the hash, it could lead to collision attacks and the potential retrieval of the password.

Weakness: CWE-916 (Use of Password Hash With Insufficient Computational Effort)

## Which versions are affected by CVE-2023-31412?

It affects 3 products.


Products: Sick Lms500 Firmware, Sick Lms511 Firmware, Sick Lms531 Firmware.

## How do I fix CVE-2023-31412?

No fix has been published for CVE-2023-31412 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-31412 being exploited?

There is no known exploitation of CVE-2023-31412 in the wild and no public exploit code.

## Other vulnerabilities in SICK AG LMS5xx

- [CVE-2023-4419](https://insights.sbomify.com/CVE-2023-4419/): Hardcoded credentials in LMS5xx (critical 9.8)
- [CVE-2023-4420](https://insights.sbomify.com/CVE-2023-4420/): Information disclosure in LMS5xx (critical 9.8)
- [CVE-2023-4418](https://insights.sbomify.com/CVE-2023-4418/): Denial of service in LMS5xx (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-31412 and fix it if it is affected.

What it is: CVE-2023-31412 is a high-severity vulnerability in SICK AG LMS5xx, published on 24 Aug 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-2023-31412 in the wild and no public exploit code.

Affected product: SICK AG LMS5xx. 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-2023-31412/ (Markdown: https://insights.sbomify.com/CVE-2023-31412/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-31412
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-31412
- OSV: https://osv.dev/vulnerability/CVE-2023-31412

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-31412/
Summaries are generated and may contain mistakes; the official description above is the record.