# CVE-2018-16055: An authenticated command injection vulnerability exists in status_interfaces.php via dhcp_relinquish_lease() in pfSense before 2.4.4 due to


- **Severity:** High 8.8 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 26 Sep 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-qg28-hqjm-95pc

## What is CVE-2018-16055?

CVE-2018-16055 is a high-severity vulnerability in n/a, published on 26 Sep 2018. 

### Official description

An authenticated command injection vulnerability exists in status_interfaces.php via dhcp_relinquish_lease() in pfSense before 2.4.4 due to its passing user input from the $_POST parameters "ifdescr" and "ipv" to a shell without escaping the contents of the variables. This allows an authenticated WebGUI user with privileges for the affected page to execute commands in the context of the root user when submitting a request to relinquish a DHCP lease for an interface which is configured to obtain its address via DHCP.

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

## Which versions are affected by CVE-2018-16055?

It affects 1 product.


Products: Netgate Pfsense.

## How do I fix CVE-2018-16055?

No fix has been published for CVE-2018-16055 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-16055 being exploited?

There is no known exploitation of CVE-2018-16055 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2019-16915](https://insights.sbomify.com/CVE-2019-16915/): Path traversal in n/a (critical 9.8)
- [CVE-2020-21487](https://insights.sbomify.com/CVE-2020-21487/): Cross-site scripting in n/a (critical 9.6)
- [CVE-2024-46538](https://insights.sbomify.com/CVE-2024-46538/): Cross-site scripting in n/a (critical 9.3)
- [CVE-2023-48123](https://insights.sbomify.com/CVE-2023-48123/): Command injection in n/a (high 8.8)
- [CVE-2023-42326](https://insights.sbomify.com/CVE-2023-42326/): Command injection in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-16055 and fix it if it is affected.

What it is: CVE-2018-16055 is a high-severity vulnerability in n/a, published on 26 Sep 2018. 
Exploitation: There is no known exploitation of CVE-2018-16055 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-2018-16055/ (Markdown: https://insights.sbomify.com/CVE-2018-16055/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-16055
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-16055
- OSV: https://osv.dev/vulnerability/CVE-2018-16055

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-16055/
Summaries are generated and may contain mistakes; the official description above is the record.