# CVE-2019-20217: Command injection in n/a

> Remote attackers can execute arbitrary OS commands on D-Link DIR-859 routers via the M-SEARCH method due to improper handling of the urn: parameter.

- **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:** 29 Jan 2020
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-rm3g-gj58-gg6q

## What is CVE-2019-20217?

CVE-2019-20217 is a critical command injection vulnerability in n/a, published on 29 Jan 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

D-Link DIR-859 1.05 and 1.06B01 Beta01 devices allow remote attackers to execute arbitrary OS commands via the urn: to the M-SEARCH method in ssdpcgi() in /htdocs/cgibin, because SERVER_ID is mishandled. The value of the urn: service/device is checked with the strstr function, which allows an attacker to concatenate arbitrary commands separated by shell metacharacters.

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

## Which versions are affected by CVE-2019-20217?

It affects 1 product.


Products: Dlink Dir-859 Firmware.

## How do I fix CVE-2019-20217?

No fix has been published for CVE-2019-20217 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-20217 being exploited?

There is no known exploitation of CVE-2019-20217 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2024-0769](https://insights.sbomify.com/CVE-2024-0769/): D-Link DIR-859 Router Path Traversal (medium 5.3, exploited in the wild)
- [CVE-2019-20215](https://insights.sbomify.com/CVE-2019-20215/): Command injection in n/a (critical 9.8)
- [CVE-2019-20216](https://insights.sbomify.com/CVE-2019-20216/): Command injection in n/a (critical 9.8)
- [CVE-2023-36092](https://insights.sbomify.com/CVE-2023-36092/): Auth bypass in n/a (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-20217 and fix it if it is affected.

What it is: CVE-2019-20217 is a critical command injection vulnerability in n/a, published on 29 Jan 2020. 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-2019-20217 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-2019-20217/ (Markdown: https://insights.sbomify.com/CVE-2019-20217/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-20217
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-20217
- OSV: https://osv.dev/vulnerability/CVE-2019-20217

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-20217/
Summaries are generated and may contain mistakes; the official description above is the record.