# CVE-2018-7300: Path traversal in n/a

> Unauthenticated attackers can exploit a directory traversal flaw to write arbitrary files and execute remote code on Homematic CCU2 devices.

- **Severity:** Critical 9.8 (`CVSS:3.1/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:** 22 Feb 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-64v8-x795-vgp3

## What is CVE-2018-7300?

CVE-2018-7300 is a critical path traversal vulnerability in n/a, published on 22 Feb 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Directory Traversal / Arbitrary File Write / Remote Code Execution in the User.setLanguage method in eQ-3 AG Homematic CCU2 2.29.2 and earlier allows remote attackers to write arbitrary files to the device's filesystem. This vulnerability can be exploited by unauthenticated attackers with access to the web interface.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2018-7300?

It affects 1 product.


Products: Eq-3 Homematic Ccu2 Firmware.

## How do I fix CVE-2018-7300?

No fix has been published for CVE-2018-7300 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-7300 being exploited?

There is no known exploitation of CVE-2018-7300 in the wild and no public exploit code.

Public exploit code:

- Homematic CCU2 2.29.23 - Arbitrary File Write (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2021-33032](https://insights.sbomify.com/CVE-2021-33032/): Command injection in n/a (critical 10.0)
- [CVE-2019-18937](https://insights.sbomify.com/CVE-2019-18937/): Command injection in n/a (critical 9.8)
- [CVE-2019-18938](https://insights.sbomify.com/CVE-2019-18938/): Code injection in n/a (critical 9.8)
- [CVE-2019-18939](https://insights.sbomify.com/CVE-2019-18939/): Command injection in n/a (critical 9.8)
- [CVE-2019-16199](https://insights.sbomify.com/CVE-2019-16199/): Auth bypass in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-7300 and fix it if it is affected.

What it is: CVE-2018-7300 is a critical path traversal vulnerability in n/a, published on 22 Feb 2018. 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-2018-7300 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-2018-7300/ (Markdown: https://insights.sbomify.com/CVE-2018-7300/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-7300
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-7300
- OSV: https://osv.dev/vulnerability/CVE-2018-7300

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-7300/
Summaries are generated and may contain mistakes; the official description above is the record.