# CVE-2020-5353: Missing authorization in Isilon OneFS

> An attacker can spoof a UID over NFS to rewrite sensitive files in the admin home directory, gaining administrative access to the system.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/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:** No
- **Published:** 29 Jul 2021
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-54h3-rfwf-3g76

## What is CVE-2020-5353?

CVE-2020-5353 is a high-severity missing authorization vulnerability in Dell Emc Powerscale Onefs, published on 29 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Dell Isilon OneFS versions 8.2.2 and earlier and Dell EMC PowerScale OneFS version 9.0.0 default configuration for Network File System (NFS) allows access to an 'admin' home directory. An attacker may leverage a spoofed Unique Identifier (UID) over NFS to rewrite sensitive files to gain administrative access to the system.

Weakness: CWE-276 (Incorrect Default Permissions)

## Which versions are affected by CVE-2020-5353?

It affects 2 products.


Products: Dell Emc Isilon Onefs, Dell Emc Powerscale Onefs.

## How do I fix CVE-2020-5353?

No fix has been published for CVE-2020-5353 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-5353 being exploited?

There is no known exploitation of CVE-2020-5353 in the wild and no public exploit code.

## Other vulnerabilities in Dell Emc Powerscale Onefs

- [CVE-2020-5328](https://insights.sbomify.com/CVE-2020-5328/): Missing authorization in Isilon OneFS (critical 9.8)
- [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)
- [CVE-2020-5318](https://insights.sbomify.com/CVE-2020-5318/): Auth bypass in Isilon OneFS (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-5353 and fix it if it is affected.

What it is: CVE-2020-5353 is a high-severity missing authorization vulnerability in Dell Emc Powerscale Onefs, published on 29 Jul 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-5353 in the wild and no public exploit code.

Affected product: Dell Emc Powerscale 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-2020-5353/ (Markdown: https://insights.sbomify.com/CVE-2020-5353/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-5353
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-5353
- OSV: https://osv.dev/vulnerability/CVE-2020-5353

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-5353/
Summaries are generated and may contain mistakes; the official description above is the record.