# CVE-2014-0239: Denial of service in n/a

> Remote attackers can cause denial of service in Samba's internal DNS server by sending forged response packets that trigger communication loops.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 28 May 2014
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2014-0239, ECHO-d287-ef1a-ddd2, GHSA-4rm5-v8f4-mx8v, UBUNTU-CVE-2014-0239

## What is CVE-2014-0239?

CVE-2014-0239 is a medium-severity denial of service vulnerability in Samba Samba, published on 28 May 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The internal DNS server in Samba 4.x before 4.0.18 does not check the QR field in the header section of an incoming DNS message before sending a response, which allows remote attackers to cause a denial of service (CPU and bandwidth consumption) via a forged response packet that triggers a communication loop, a related issue to CVE-1999-0103.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2014-0239?

It affects 1 product.


Products: Samba Samba.

## How do I fix CVE-2014-0239?

Upgrade to a fixed version.

## Is CVE-2014-0239 being exploited?

There is no known exploitation of CVE-2014-0239 in the wild and no public exploit code.

## Other vulnerabilities in Samba Samba

- [CVE-2012-1182](https://insights.sbomify.com/CVE-2012-1182/): Integer overflow in n/a (critical 10.0)
- [CVE-2007-2446](https://insights.sbomify.com/CVE-2007-2446/): Memory corruption in n/a (critical 10.0)
- [CVE-2004-0600](https://insights.sbomify.com/CVE-2004-0600/): Memory corruption in n/a (critical 10.0)
- [CVE-1999-0810](https://insights.sbomify.com/CVE-1999-0810/): Denial of service in n/a (critical 10.0)
- [CVE-1999-0182](https://insights.sbomify.com/CVE-1999-0182/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2014-0239 and fix it if it is affected.

What it is: CVE-2014-0239 is a medium-severity denial of service vulnerability in Samba Samba, published on 28 May 2014. 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-2014-0239 in the wild and no public exploit code.

Affected product: Samba Samba. 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-2014-0239/ (Markdown: https://insights.sbomify.com/CVE-2014-0239/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2014-0239
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2014-0239
- OSV: https://osv.dev/vulnerability/CVE-2014-0239

---
From sbomify Insights: https://insights.sbomify.com/CVE-2014-0239/
Summaries are generated and may contain mistakes; the official description above is the record.