# CVE-2021-40222: Command injection in n/a

> Remote attackers can inject shell commands via the hostname field to execute code as root on Rittal CMC PU III devices.

- **Severity:** High 7.2 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Sep 2021
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-cxf9-4ff5-hx4j

## What is CVE-2021-40222?

CVE-2021-40222 is a high-severity command injection vulnerability in n/a, published on 9 Sep 2021. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Rittal CMC PU III Web management Version affected: V3.11.00_2. Version fixed: V3.17.10 is affected by a remote code execution vulnerablity. It is possible to introduce shell code to create a reverse shell in the PU-Hostname field of the TCP/IP Configuration dialog. Web application fails to sanitize user input on Network TCP/IP configuration page. This allows the attacker to inject commands as root on the device which will be executed once the data is received.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2021-40222?

It affects 1 product.


Products: Rittal Cmc Pu Iii 7030.000 Firmware.

## How do I fix CVE-2021-40222?

No fix has been published for CVE-2021-40222 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-40222 being exploited?

There is no known exploitation of CVE-2021-40222 in the wild and no public exploit code.

Public exploit code:

- Remote Code Execution at Rittal (github_poc): https://github.com/asang17/CVE-2021-40222

## Other vulnerabilities in n/a

- [CVE-2019-19393](https://insights.sbomify.com/CVE-2019-19393/): Cross-site scripting in n/a (medium 6.1)
- [CVE-2021-40223](https://insights.sbomify.com/CVE-2021-40223/): Cross-site scripting in n/a (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-40222 and fix it if it is affected.

What it is: CVE-2021-40222 is a high-severity command injection vulnerability in n/a, published on 9 Sep 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-40222 in the wild and no public exploit code.

Affected product: n/a. 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-2021-40222/ (Markdown: https://insights.sbomify.com/CVE-2021-40222/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-40222
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-40222
- OSV: https://osv.dev/vulnerability/CVE-2021-40222

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-40222/
Summaries are generated and may contain mistakes; the official description above is the record.