# CVE-2019-5054: Null dereference in N300 WNR2000v5

> An unauthenticated attacker can crash the HTTP service on Netgear N300 routers by sending a request with an empty User-Agent string.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:** 11 Sep 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-3fq7-8gqg-m2m9

## What is CVE-2019-5054?

CVE-2019-5054 is a high-severity vulnerability in Netgear Wnr2000 Firmware, published on 11 Sep 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An exploitable denial-of-service vulnerability exists in the session handling functionality of the NETGEAR N300 (WNR2000v5 with Firmware Version V1.0.0.70) HTTP server. An HTTP request with an empty User-Agent string sent to a page requiring authentication can cause a null pointer dereference, resulting in the HTTP service crashing. An unauthenticated attacker can send a specially crafted HTTP request to trigger this vulnerability.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2019-5054?

It affects 1 product.


Products: Netgear Wnr2000 Firmware.

## How do I fix CVE-2019-5054?

No fix has been published for CVE-2019-5054 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-5054 being exploited?

There is no known exploitation of CVE-2019-5054 in the wild and no public exploit code.

## Other vulnerabilities in Netgear Wnr2000 Firmware

- [CVE-2017-6862](https://insights.sbomify.com/CVE-2017-6862/): NETGEAR Multiple Devices Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2023-50089](https://insights.sbomify.com/CVE-2023-50089/): Command injection in n/a (critical 9.8)
- [CVE-2022-46423](https://insights.sbomify.com/CVE-2022-46423/): File upload in n/a (high 8.1)
- [CVE-2019-5055](https://insights.sbomify.com/CVE-2019-5055/): Null dereference in N300 WNR2000v5 (high 7.5)
- [CVE-2022-46422](https://insights.sbomify.com/CVE-2022-46422/): Denial of service in n/a (medium 4.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-5054 and fix it if it is affected.

What it is: CVE-2019-5054 is a high-severity vulnerability in Netgear Wnr2000 Firmware, published on 11 Sep 2019. 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-2019-5054 in the wild and no public exploit code.

Affected product: Netgear Wnr2000 Firmware. 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-2019-5054/ (Markdown: https://insights.sbomify.com/CVE-2019-5054/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-5054
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-5054
- OSV: https://osv.dev/vulnerability/CVE-2019-5054

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-5054/
Summaries are generated and may contain mistakes; the official description above is the record.