# CVE-2020-5347: Denial of service in Isilon OneFS

> An attacker can trigger a loop in SmartConnect, causing high CPU usage and preventing DNS responses, leading to denial of service.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Apr 2020
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-rmjc-gxcm-fvf5

## What is CVE-2020-5347?

CVE-2020-5347 is a medium-severity denial of service vulnerability in Dell Isilon OneFS, published on 3 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Dell EMC Isilon OneFS versions 8.2.2 and earlier contain a denial of service vulnerability. SmartConnect had an error condition that may be triggered to loop, using CPU and potentially preventing other SmartConnect DNS responses.

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2020-5347?

It affects 1 product.


Products: Dell Emc Isilon Onefs.

## How do I fix CVE-2020-5347?

No fix has been published for CVE-2020-5347 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-5347 being exploited?

There is no known exploitation of CVE-2020-5347 in the wild and no public exploit code.

## Other vulnerabilities in Dell Isilon OneFS

- [CVE-2020-5328](https://insights.sbomify.com/CVE-2020-5328/): Missing authorization in Isilon OneFS (critical 9.8)
- [CVE-2020-5353](https://insights.sbomify.com/CVE-2020-5353/): Missing authorization in Isilon OneFS (high 8.8)
- [CVE-2020-5369](https://insights.sbomify.com/CVE-2020-5369/): Privilege escalation in Isilon OneFS (high 8.8)
- [CVE-2018-1213](https://insights.sbomify.com/CVE-2018-1213/): Cross-site request forgery in Isilon OneFS (high 8.8)
- [CVE-2020-5371](https://insights.sbomify.com/CVE-2020-5371/): Misconfiguration in Isilon OneFS (high 8.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-5347 and fix it if it is affected.

What it is: CVE-2020-5347 is a medium-severity denial of service vulnerability in Dell Isilon OneFS, published on 3 Apr 2020. 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-2020-5347 in the wild and no public exploit code.

Affected product: Dell Isilon OneFS. 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-2020-5347/ (Markdown: https://insights.sbomify.com/CVE-2020-5347/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-5347
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-5347
- OSV: https://osv.dev/vulnerability/CVE-2020-5347

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-5347/
Summaries are generated and may contain mistakes; the official description above is the record.