# CVE-2022-27615: Path traversal in DNS Server

> Remote authenticated users can delete arbitrary files via path traversal in Synology DNS Server.

- **Severity:** High 7.7 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Jul 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-9q4r-rvww-q2rv

## What is CVE-2022-27615?

CVE-2022-27615 is a high-severity path traversal vulnerability in Synology DNS Server, published on 28 Jul 2022. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Improper limitation of a pathname to a restricted directory ('Path Traversal') vulnerability in cgi component in Synology DNS Server before 2.2.2-5027 allows remote authenticated users to delete arbitrary files via unspecified vectors.

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

## Which versions are affected by CVE-2022-27615?

It affects 1 product.


Products: Synology Dns Server.

## How do I fix CVE-2022-27615?

No fix has been published for CVE-2022-27615 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-27615 being exploited?

There is no known exploitation of CVE-2022-27615 in the wild and no public exploit code.

## Other vulnerabilities in Synology DNS Server

- [CVE-2017-12074](https://insights.sbomify.com/CVE-2017-12074/): Path traversal in Synology DNS Server (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-27615 and fix it if it is affected.

What it is: CVE-2022-27615 is a high-severity path traversal vulnerability in Synology DNS Server, published on 28 Jul 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2022-27615 in the wild and no public exploit code.

Affected product: Synology DNS Server. 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-2022-27615/ (Markdown: https://insights.sbomify.com/CVE-2022-27615/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-27615
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-27615
- OSV: https://osv.dev/vulnerability/CVE-2022-27615

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-27615/
Summaries are generated and may contain mistakes; the official description above is the record.