# CVE-2020-25233: Hardcoded credentials in LOGO! 8 BM (incl. SIPLUS variants)

> Attackers can extract the private RSA key from firmware to decrypt communication with Siemens LOGO! 8 BM devices.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 14 Dec 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-j892-5fgm-v8hw

## What is CVE-2020-25233?

CVE-2020-25233 is a medium-severity vulnerability in Siemens LOGO! 8 BM (incl. SIPLUS variants), published on 14 Dec 2020. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V8.3). The firmware update of affected devices contains the private RSA key that is used as a basis for encryption of communication with the device.

Weakness: CWE-321 (Use of Hard-coded Cryptographic Key)

## Which versions are affected by CVE-2020-25233?

It affects 1 product.


Products: Siemens Logo\! 8 Bm Firmware.

## How do I fix CVE-2020-25233?

No fix has been published for CVE-2020-25233 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-25233 being exploited?

There is no known exploitation of CVE-2020-25233 in the wild and no public exploit code.

## Other vulnerabilities in Siemens LOGO! 8 BM (incl. SIPLUS variants)

- [CVE-2020-25228](https://insights.sbomify.com/CVE-2020-25228/): Missing authorization in LOGO! 8 BM (incl. SIPLUS variants) (critical 9.8)
- [CVE-2020-7593](https://insights.sbomify.com/CVE-2020-7593/): Memory corruption in LOGO! 8 BM (incl. SIPLUS variants) (critical 9.8)
- [CVE-2020-7589](https://insights.sbomify.com/CVE-2020-7589/): Missing authorization in LOGO! 8 BM (incl. SIPLUS variants) (critical 9.1)
- [CVE-2020-25234](https://insights.sbomify.com/CVE-2020-25234/): Hardcoded credentials in LOGO! 8 BM (incl. SIPLUS variants) (high 7.7)
- [CVE-2020-25229](https://insights.sbomify.com/CVE-2020-25229/): Weak cryptography in LOGO! 8 BM (incl. SIPLUS variants) (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-25233 and fix it if it is affected.

What it is: CVE-2020-25233 is a medium-severity vulnerability in Siemens LOGO! 8 BM (incl. SIPLUS variants), published on 14 Dec 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-25233 in the wild and no public exploit code.

Affected product: Siemens LOGO! 8 BM (incl. SIPLUS variants). 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-2020-25233/ (Markdown: https://insights.sbomify.com/CVE-2020-25233/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-25233
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-25233
- OSV: https://osv.dev/vulnerability/CVE-2020-25233

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-25233/
Summaries are generated and may contain mistakes; the official description above is the record.