# CVE-2021-0004: Denial of service in Intel(R) Ethernet Adapters 800 Series Controllers and associated adapters

> A privileged local user can cause a denial of service in Intel Ethernet Adapter firmware due to improper buffer restrictions.

- **Severity:** Medium 4.4 (`CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Aug 2021
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-p85q-fm7j-ffmp

## What is CVE-2021-0004?

CVE-2021-0004 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 11 Aug 2021. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Improper buffer restrictions in the firmware of Intel(R) Ethernet Adapters 800 Series Controllers and associated adapters before version 1.5.3.0 may allow a privileged user to potentially enable denial of service via local access.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2021-0004?

It affects 2 products.


Products: Fedoraproject Fedora, Intel Ethernet Controller E810 Firmware.

## How do I fix CVE-2021-0004?

No fix has been published for CVE-2021-0004 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-0004 being exploited?

There is no known exploitation of CVE-2021-0004 in the wild and no public exploit code.

## Other vulnerabilities in Fedoraproject Fedora

- [CVE-2024-4577](https://insights.sbomify.com/CVE-2024-4577/): PHP-CGI OS Command Injection (critical 9.8, exploited in the wild)
- [CVE-2021-39226](https://insights.sbomify.com/CVE-2021-39226/): Grafana Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2019-5544](https://insights.sbomify.com/CVE-2019-5544/): VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2024-4947](https://insights.sbomify.com/CVE-2024-4947/): Google Chromium V8 Type Confusion (critical 9.6, exploited in the wild)
- [CVE-2024-4671](https://insights.sbomify.com/CVE-2024-4671/): Google Chromium Visuals Use-After-Free (critical 9.6, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-0004 and fix it if it is affected.

What it is: CVE-2021-0004 is a medium-severity denial of service vulnerability in Fedoraproject Fedora, published on 11 Aug 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-2021-0004 in the wild and no public exploit code.

Affected product: Fedoraproject Fedora. 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-2021-0004/ (Markdown: https://insights.sbomify.com/CVE-2021-0004/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-0004
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-0004
- OSV: https://osv.dev/vulnerability/CVE-2021-0004

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-0004/
Summaries are generated and may contain mistakes; the official description above is the record.