# CVE-2021-41054: Memory corruption in n/a

> A buffer overflow in the atftp TFTP server allows remote attackers to execute arbitrary code or cause a denial of service via crafted packets.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 13 Sep 2021
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2021-41054, GHSA-pjhr-q582-mpq7, SUSE-SU-2021:3237-1, UBUNTU-CVE-2021-41054

## What is CVE-2021-41054?

CVE-2021-41054 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 13 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

tftpd_file.c in atftp through 0.7.4 has a buffer overflow because buffer-size handling does not properly consider the combination of data, OACK, and other options.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2021-41054?

It affects 2 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `atftp` | SUSE:Linux Enterprise Server 12 SP5 | All versions | 0.7.0-160.11.1 |
| `atftp` | SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 0.7.0-160.11.1 |

Products: Atftp Project Atftp, Debian Debian Linux.

## How do I fix CVE-2021-41054?

Apply the vendor's patch.

## Is CVE-2021-41054 being exploited?

There is no known exploitation of CVE-2021-41054 in the wild and no public exploit code.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2019-11365](https://insights.sbomify.com/CVE-2019-11365/): Memory corruption in n/a (critical 9.8)
- [CVE-2020-6097](https://insights.sbomify.com/CVE-2020-6097/): Denial of service in atftpd (high 7.5)
- [CVE-2019-11366](https://insights.sbomify.com/CVE-2019-11366/): Null dereference in n/a (medium 5.9)
- [CVE-2021-46671](https://insights.sbomify.com/CVE-2021-46671/): Information disclosure in n/a (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-41054 and fix it if it is affected.

What it is: CVE-2021-41054 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 13 Sep 2021. 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-2021-41054 in the wild and no public exploit code.

Affected product: Debian Debian Linux. 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-2021-41054/ (Markdown: https://insights.sbomify.com/CVE-2021-41054/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-41054
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-41054
- OSV: https://osv.dev/vulnerability/CVE-2021-41054

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-41054/
Summaries are generated and may contain mistakes; the official description above is the record.