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CVE-2023-31999GHSA-G8X5-P9QC-CF95

All versions of @fastify/oauth2 used a statically generated state parameter at startup time and were used across all requests for all users.

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in v7.2.0, 7.2.0
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: total

Summary

All versions of @fastify/oauth2 used a statically generated state parameter at startup time and were used across all requests for all users. The purpose of the Oauth2 state parameter is to prevent Cross-Site-Request-Forgery attacks. As such, it should be unique per user and should be connected to the user's session in some way that will allow the server to validate it. v7.2.0 changes the default behavior to store the state in a cookie with the http-only and same-site=lax attributes set. The state is now by default generated for every user. Note that this contains a breaking change in the checkStateFunction function, which now accepts the full Request object.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • npm @fastify/oauth2

    From v7.2.0 · fixed in v7.2.0

  • @fastify/oauth2npm

    fixed in 7.2.0

References 3

hackerone.com

auth0.com

GitHub · fastify/fastify-oauth2