# CVE-2019-10921: Information disclosure in LOGO! 8 BM (incl. SIPLUS variants)

> An unauthenticated attacker with network access can obtain device passwords due to unencrypted storage, compromising confidentiality.

- **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:** 14 May 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-m7mv-qphm-p8rq

## What is CVE-2019-10921?

CVE-2019-10921 is a high-severity vulnerability in Siemens LOGO! 8 BM (incl. SIPLUS variants), published on 14 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been identified in LOGO! 8 BM (incl. SIPLUS variants) (All versions < V8.3). Unencrypted storage of passwords in the project could allow an attacker with access to port 10005/tcp to obtain passwords of the device. The security vulnerability could be exploited by an unauthenticated attacker with network access to port 10005/tcp. No user interaction is required to exploit this security vulnerability. The vulnerability impacts confidentiality of the device. At the time of advisory publication no public exploitation of this security vulnerability was known

Weakness: CWE-522 (Insufficiently Protected Credentials), CWE-256 (Plaintext Storage of a Password)

## Which versions are affected by CVE-2019-10921?

It affects 1 product.


Products: Siemens Logo\!8 Bm Firmware.

## How do I fix CVE-2019-10921?

No fix has been published for CVE-2019-10921 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-10921 being exploited?

There is no known exploitation of CVE-2019-10921 in the wild and no public exploit code.

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

- [CVE-2019-10919](https://insights.sbomify.com/CVE-2019-10919/): Missing authorization in LOGO! 8 BM (incl. SIPLUS variants) (critical 9.4)
- [CVE-2019-10920](https://insights.sbomify.com/CVE-2019-10920/): Hardcoded credentials in LOGO! 8 BM (incl. SIPLUS variants) (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-10921 and fix it if it is affected.

What it is: CVE-2019-10921 is a high-severity vulnerability in Siemens LOGO! 8 BM (incl. SIPLUS variants), published on 14 May 2019. 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-2019-10921 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-2019-10921/ (Markdown: https://insights.sbomify.com/CVE-2019-10921/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-10921
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-10921
- OSV: https://osv.dev/vulnerability/CVE-2019-10921

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-10921/
Summaries are generated and may contain mistakes; the official description above is the record.