# CVE-2020-13960: Misconfiguration in n/a

> Remote attackers can intercept DNS queries and provide malicious responses due to a default domain name configuration in D-Link routers.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Jun 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-7w9r-cjjc-pxw2

## What is CVE-2020-13960?

CVE-2020-13960 is a high-severity vulnerability in n/a, published on 8 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

D-Link DSL 2730-U IN_1.10 and IN_1.11 and DIR-600M 3.04 devices have the domain.name string in the DNS resolver search path by default, which allows remote attackers to provide valid DNS responses (and also offer Internet services such as HTTP) for names that otherwise would have had an NXDOMAIN error, by registering a subdomain of the domain.name domain name.

## Which versions are affected by CVE-2020-13960?

It affects 2 products.


Products: Dlink Dir-600m Firmware, Dlink Dsl-2730u Firmware.

## How do I fix CVE-2020-13960?

No fix has been published for CVE-2020-13960 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-13960 being exploited?

There is no known exploitation of CVE-2020-13960 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2019-13101](https://insights.sbomify.com/CVE-2019-13101/): Missing authorization in n/a (critical 9.8)
- [CVE-2019-7736](https://insights.sbomify.com/CVE-2019-7736/): Auth bypass in n/a (critical 9.8)
- [CVE-2017-9100](https://insights.sbomify.com/CVE-2017-9100/): Auth bypass in n/a (high 8.8)
- [CVE-2024-1786](https://insights.sbomify.com/CVE-2024-1786/): D-Link DIR-600M C1 Telnet Service buffer overflow (high 7.5)
- [CVE-2018-16605](https://insights.sbomify.com/CVE-2018-16605/): Cross-site scripting in n/a (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-13960 and fix it if it is affected.

What it is: CVE-2020-13960 is a high-severity vulnerability in n/a, published on 8 Jun 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-2020-13960 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-2020-13960/ (Markdown: https://insights.sbomify.com/CVE-2020-13960/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-13960
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-13960
- OSV: https://osv.dev/vulnerability/CVE-2020-13960

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-13960/
Summaries are generated and may contain mistakes; the official description above is the record.