# CVE-2024-56946: Denial of service in n/a

> Remote attackers can cause a permanent denial of service in Technitium DNS Server by triggering unhandled exceptions in DNS-over-QUIC listener threads.

- **Severity:** Medium 5.3 (`CVSS:3.1/AC:L/AV:N/A:L/C:N/I:N/PR:N/S:U/UI:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Feb 2025
- **Updated:** 13 Mar 2025
- **Also known as:** GHSA-r58r-w68f-vcxj

## What is CVE-2024-56946?

CVE-2024-56946 is a medium-severity denial of service vulnerability in n/a, published on 3 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Denial of service in DNS-over-QUIC in Technitium DNS Server <= v13.2.2 allows remote attackers to permanently stop the server from accepting new DNS-over-QUIC connections by triggering unhandled exceptions in listener threads.

Weakness: CWE-248 (Uncaught Exception)

## Which versions are affected by CVE-2024-56946?

It affects 1 product.


Products: Technitium Dnsserver.

## How do I fix CVE-2024-56946?

No fix has been published for CVE-2024-56946 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-56946 being exploited?

There is no known exploitation of CVE-2024-56946 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2025-50334](https://insights.sbomify.com/CVE-2025-50334/): Denial of service in n/a (high 7.5)
- [CVE-2024-56089](https://insights.sbomify.com/CVE-2024-56089/): Other in n/a (high 7.5)
- [CVE-2023-28451](https://insights.sbomify.com/CVE-2023-28451/): Denial of service in n/a (high 7.5)
- [CVE-2023-28455](https://insights.sbomify.com/CVE-2023-28455/): Denial of service in n/a (high 7.5)
- [CVE-2023-28456](https://insights.sbomify.com/CVE-2023-28456/): Denial of service in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-56946 and fix it if it is affected.

What it is: CVE-2024-56946 is a medium-severity denial of service vulnerability in n/a, published on 3 Feb 2025. 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-2024-56946 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-2024-56946/ (Markdown: https://insights.sbomify.com/CVE-2024-56946/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-56946
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-56946
- OSV: https://osv.dev/vulnerability/CVE-2024-56946

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-56946/
Summaries are generated and may contain mistakes; the official description above is the record.