# CVE-2017-14423: Auth bypass in n/a

> Remote attackers can bypass authentication by guessing nonces to modify DNS settings on D-Link DIR-850L 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:** 13 Sep 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-cj6q-74j6-gvjm

## What is CVE-2017-14423?

CVE-2017-14423 is a high-severity authentication bypass vulnerability in n/a, published on 13 Sep 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

htdocs/parentalcontrols/bind.php on D-Link DIR-850L REV. A (with firmware through FW114WWb07_h2ab_beta1) devices does not prevent unauthenticated nonce-guessing attacks, which makes it easier for remote attackers to change the DNS configuration via a series of requests.

Weakness: CWE-307 (Improper Restriction of Excessive Authentication Attempts)

## Which versions are affected by CVE-2017-14423?

It affects 1 product.


Products: Dlink Dir-850l Firmware.

## How do I fix CVE-2017-14423?

No fix has been published for CVE-2017-14423 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-14423 being exploited?

There is no known exploitation of CVE-2017-14423 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2023-49004](https://insights.sbomify.com/CVE-2023-49004/): Code injection in n/a (critical 9.8)
- [CVE-2018-9032](https://insights.sbomify.com/CVE-2018-9032/): Auth bypass in n/a (critical 9.8)
- [CVE-2017-14417](https://insights.sbomify.com/CVE-2017-14417/): Missing authorization in n/a (critical 9.8)
- [CVE-2017-14421](https://insights.sbomify.com/CVE-2017-14421/): Hardcoded credentials in n/a (critical 9.8)
- [CVE-2017-14429](https://insights.sbomify.com/CVE-2017-14429/): Command injection in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-14423 and fix it if it is affected.

What it is: CVE-2017-14423 is a high-severity authentication bypass vulnerability in n/a, published on 13 Sep 2017. 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-2017-14423 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-2017-14423/ (Markdown: https://insights.sbomify.com/CVE-2017-14423/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-14423
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-14423
- OSV: https://osv.dev/vulnerability/CVE-2017-14423

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-14423/
Summaries are generated and may contain mistakes; the official description above is the record.