# CVE-2019-11365: Memory corruption in n/a

> A remote attacker can trigger a stack-based buffer overflow in the atftpd TFTP server via crafted error packets, potentially leading to code execution or service disruption.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:** 20 Apr 2019
- **Updated:** 4 Aug 2024
- **Also known as:** DEBIAN-CVE-2019-11365, GHSA-4g6j-v9hp-3h66, UBUNTU-CVE-2019-11365

## What is CVE-2019-11365?

CVE-2019-11365 is a critical memory corruption vulnerability in n/a, published on 20 Apr 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in atftpd in atftp 0.7.1. A remote attacker may send a crafted packet triggering a stack-based buffer overflow due to an insecurely implemented strncpy call. The vulnerability is triggered by sending an error packet of 3 bytes or fewer. There are multiple instances of this vulnerable strncpy pattern within the code base, specifically within tftpd_file.c, tftp_file.c, tftpd_mtftp.c, and tftp_mtftp.c.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2019-11365?

It affects 1 product.


Products: Atftp Project Atftp.

## How do I fix CVE-2019-11365?

Apply the vendor's patch.

## Is CVE-2019-11365 being exploited?

There is no known exploitation of CVE-2019-11365 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2021-41054](https://insights.sbomify.com/CVE-2021-41054/): Memory corruption in n/a (high 7.5)
- [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-2019-11365 and fix it if it is affected.

What it is: CVE-2019-11365 is a critical memory corruption vulnerability in n/a, published on 20 Apr 2019. 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-2019-11365 in the wild and no public exploit code.

Affected product: n/a. 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-2019-11365/ (Markdown: https://insights.sbomify.com/CVE-2019-11365/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-11365
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-11365
- OSV: https://osv.dev/vulnerability/CVE-2019-11365

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-11365/
Summaries are generated and may contain mistakes; the official description above is the record.