# CVE-2018-14747: Null dereference in QNAP QTS

> Remote attackers can crash the QNAP NAS media server via a null pointer dereference, requiring a firmware upgrade.

- **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:** 28 Nov 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-qjhx-fg4j-47h8

## What is CVE-2018-14747?

CVE-2018-14747 is a high-severity vulnerability in Qnap Qts, published on 28 Nov 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

NULL Pointer Dereference vulnerability in QTS 4.3.5 build 20181013, QTS 4.3.4 build 20181008, QTS 4.3.3 build 20180829, QTS 4.2.6 build 20180829 and earlier versions could allow remote attackers to crash the NAS media server.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2018-14747?

It affects 1 product.


Products: Qnap Qts.

## How do I fix CVE-2018-14747?

No fix has been published for CVE-2018-14747 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-14747 being exploited?

There is no known exploitation of CVE-2018-14747 in the wild and no public exploit code.

## Other vulnerabilities in Qnap Qts

- [CVE-2020-2509](https://insights.sbomify.com/CVE-2020-2509/): QNAP Network-Attached Storage (NAS) Command Injection (critical 9.8, exploited in the wild)
- [CVE-2018-19949](https://insights.sbomify.com/CVE-2018-19949/): QNAP NAS File Station Command Injection (critical 9.8, exploited in the wild)
- [CVE-2019-7193](https://insights.sbomify.com/CVE-2019-7193/): QNAP QTS Improper Input Validation (critical 9.8, exploited in the wild)
- [CVE-2018-19943](https://insights.sbomify.com/CVE-2018-19943/): QNAP NAS File Station Cross-Site Scripting (high 8.0, exploited in the wild)
- [CVE-2018-19953](https://insights.sbomify.com/CVE-2018-19953/): QNAP NAS File Station Cross-Site Scripting (medium 6.1, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-14747 and fix it if it is affected.

What it is: CVE-2018-14747 is a high-severity vulnerability in Qnap Qts, published on 28 Nov 2018. 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-2018-14747 in the wild and no public exploit code.

Affected product: Qnap Qts. 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-2018-14747/ (Markdown: https://insights.sbomify.com/CVE-2018-14747/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-14747
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-14747
- OSV: https://osv.dev/vulnerability/CVE-2018-14747

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-14747/
Summaries are generated and may contain mistakes; the official description above is the record.