# CVE-2017-7652: Denial of service in Eclipse Mosquitto

> An attacker can cause a denial of service in Eclipse Mosquitto by exhausting file descriptors, preventing configuration reloads when a HUP signal is sent.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 25 Apr 2018
- **Updated:** 5 Aug 2024
- **Also known as:** ALPINE-CVE-2017-7652, DEBIAN-CVE-2017-7652, GHSA-7349-r6vq-ggx3, UBUNTU-CVE-2017-7652

## What is CVE-2017-7652?

CVE-2017-7652 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 25 Apr 2018. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

In Eclipse Mosquitto 1.4.14, if a Mosquitto instance is set running with a configuration file, then sending a HUP signal to server triggers the configuration to be reloaded from disk. If there are lots of clients connected so that there are no more file descriptors/sockets available (default limit typically 1024 file descriptors on Linux), then opening the configuration file will fail.

Weakness: CWE-789 (Memory Allocation with Excessive Size Value)

## Which versions are affected by CVE-2017-7652?

It affects 2 products.


Products: Debian Debian Linux, Eclipse Mosquitto.

## How do I fix CVE-2017-7652?

Apply the vendor's patch.

## Is CVE-2017-7652 being exploited?

There is no known exploitation of CVE-2017-7652 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-7652 and fix it if it is affected.

What it is: CVE-2017-7652 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 25 Apr 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-7652 in the wild and no public exploit code.

Affected product: Debian Debian Linux. 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-2017-7652/ (Markdown: https://insights.sbomify.com/CVE-2017-7652/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-7652
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-7652
- OSV: https://osv.dev/vulnerability/CVE-2017-7652

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-7652/
Summaries are generated and may contain mistakes; the official description above is the record.