# CVE-2021-27001: Business logic in Clustered Data ONTAP

> Privileged local attackers can modify WORM data before retention expires, compromising data integrity in NetApp Clustered Data ONTAP.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Oct 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-x9cp-w29r-p2qw

## What is CVE-2021-27001?

CVE-2021-27001 is a medium-severity vulnerability in Netapp Clustered Data Ontap, published on 19 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Clustered Data ONTAP versions 9.x prior to 9.5P18, 9.6P16, 9.7P16, 9.8P7 and 9.9.1P2 are susceptible to a vulnerability which could allow an authenticated privileged local attacker to arbitrarily modify Compliance-mode WORM data prior to the end of the retention period.

## Which versions are affected by CVE-2021-27001?

It affects 1 product.


Products: Netapp Clustered Data Ontap.

## How do I fix CVE-2021-27001?

No fix has been published for CVE-2021-27001 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-27001 being exploited?

There is no known exploitation of CVE-2021-27001 in the wild and no public exploit code.

## Other vulnerabilities in Netapp Clustered Data Ontap

- [CVE-2015-7853](https://insights.sbomify.com/CVE-2015-7853/): Integer overflow in n/a (critical 9.8)
- [CVE-2017-9119](https://insights.sbomify.com/CVE-2017-9119/): Denial of service in n/a (critical 9.8)
- [CVE-2016-7480](https://insights.sbomify.com/CVE-2016-7480/): Deserialization in PHP before 7.0.12 (critical 9.8)
- [CVE-2017-5340](https://insights.sbomify.com/CVE-2017-5340/): Integer overflow in n/a (critical 9.8)
- [CVE-2017-11147](https://insights.sbomify.com/CVE-2017-11147/): Information disclosure in n/a (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-27001 and fix it if it is affected.

What it is: CVE-2021-27001 is a medium-severity vulnerability in Netapp Clustered Data Ontap, published on 19 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-27001 in the wild and no public exploit code.

Affected product: Netapp Clustered Data Ontap. 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-2021-27001/ (Markdown: https://insights.sbomify.com/CVE-2021-27001/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-27001
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-27001
- OSV: https://osv.dev/vulnerability/CVE-2021-27001

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-27001/
Summaries are generated and may contain mistakes; the official description above is the record.