# CVE-2021-21600: Denial of service in NetWorker

> An authorized user can cause denial of service in Dell NetWorker via uncontrolled resource consumption in the API service.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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:** 10 Aug 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-pxqh-pg23-r5vg

## What is CVE-2021-21600?

CVE-2021-21600 is a medium-severity denial of service vulnerability in Dell NetWorker, published on 10 Aug 2021. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Dell EMC NetWorker, 19.4 or older, contain an uncontrolled resource consumption flaw in its API service. An authorized API user could potentially exploit this vulnerability via the web and desktop user interfaces, leading to denial of service in the manageability path.

Weakness: CWE-772 (Missing Release of Resource after Effective Lifetime)

## Which versions are affected by CVE-2021-21600?

It affects 1 product.


Products: Dell Emc Networker.

## How do I fix CVE-2021-21600?

No fix has been published for CVE-2021-21600 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-21600 being exploited?

There is no known exploitation of CVE-2021-21600 in the wild and no public exploit code.

## Other vulnerabilities in Dell NetWorker

- [CVE-2017-8023](https://insights.sbomify.com/CVE-2017-8023/): EMC Networker Remote Code Execution Vulnerability (critical 9.8)
- [CVE-2018-11050](https://insights.sbomify.com/CVE-2018-11050/): Information disclosure in Networker (high 8.8)
- [CVE-2021-21558](https://insights.sbomify.com/CVE-2021-21558/): Information disclosure in NetWorker (high 8.2)
- [CVE-2021-21546](https://insights.sbomify.com/CVE-2021-21546/): Information disclosure in NetWorker (high 7.8)
- [CVE-2023-24567](https://insights.sbomify.com/CVE-2023-24567/): Information disclosure in Dell NetWorker, NVE (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-21600 and fix it if it is affected.

What it is: CVE-2021-21600 is a medium-severity denial of service vulnerability in Dell NetWorker, published on 10 Aug 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-2021-21600 in the wild and no public exploit code.

Affected product: Dell NetWorker. 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-2021-21600/ (Markdown: https://insights.sbomify.com/CVE-2021-21600/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-21600
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-21600
- OSV: https://osv.dev/vulnerability/CVE-2021-21600

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-21600/
Summaries are generated and may contain mistakes; the official description above is the record.