# CVE-2018-20218: Command injection in n/a

> Attackers can execute arbitrary commands via the login password field on Teracue ENC-400 devices due to lack of input validation.

- **Severity:** Critical 9.8 (`CVSS:3.0/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 Mar 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-27cv-whxj-627j

## What is CVE-2018-20218?

CVE-2018-20218 is a critical command injection vulnerability in n/a, published on 17 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered on Teracue ENC-400 devices with firmware 2.56 and below. The login form passes user input directly to a shell command without any kind of escaping or validation in /usr/share/www/check.lp file. An attacker is able to perform command injection using the "password" parameter in the login form.

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

## Which versions are affected by CVE-2018-20218?

It affects 3 products.


Products: Teracue Enc-400 Hdmi2 Firmware, Teracue Enc-400 Hdmi Firmware, Teracue Enc-400 Hdsdi Firmware.

## How do I fix CVE-2018-20218?

No fix has been published for CVE-2018-20218 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-20218 being exploited?

There is no known exploitation of CVE-2018-20218 in the wild and no public exploit code.

Public exploit code:

- Teracue ENC-400 - Command Injection / Missing Authentication (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2018-20219](https://insights.sbomify.com/CVE-2018-20219/): Hardcoded credentials in n/a (high 8.1)
- [CVE-2018-20220](https://insights.sbomify.com/CVE-2018-20220/): Missing authorization in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-20218 and fix it if it is affected.

What it is: CVE-2018-20218 is a critical command injection vulnerability in n/a, published on 17 Mar 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-2018-20218 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-2018-20218/ (Markdown: https://insights.sbomify.com/CVE-2018-20218/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-20218
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-20218
- OSV: https://osv.dev/vulnerability/CVE-2018-20218

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-20218/
Summaries are generated and may contain mistakes; the official description above is the record.