Fastify: Incorrect Content-Type parsing can lead to CSRF attack
### Impact The attacker can use the incorrect `Content-Type` to bypass the `Pre-Flight` checking of `fetch`. `fetch()` requests with Content-Type’s [essence](https://mimesniff.spec.whatwg.org/#mime-type-essence) as "application/x-www-form-urlencoded", "multipart/form-data", or "text/plain", could potentially be used to invoke routes that only accepts `application/json` content type, thus bypassing any [CORS protection](https://fetch.spec.whatwg.org/#simple-header), and therefore they could lead to a Cross-Site Request Forgery attack. ### Patches For `4.x` users, please update to at least `4.10.2` For `3.x` users, please update to at least `3.29.4` ### Workarounds Implement Cross-Site Request Forgery protection using [`@fastify/csrf`](https://www.npmjs.com/package/@fastify/csrf). ### References Check out the HackerOne report: https://hackerone.com/reports/1763832. ### For more information [Fastify security policy](https://github.com/fastify/fastify/security/policy)
beschreibt (1)
Zugehörige CVEs.
| ID | Schweregrad | ausnutzbar | ||
|---|---|---|---|---|
| CVE-2022-41919US | high8.8 | — | ||
Fastify is a web framework with minimal overhead and plugin architecture. The attacker can use the incorrect `Content-Type` to bypass the `Pre-Flight` checking of `fetch`. `fetch()… | ||||
Referenzen
Externe Belege — Patches, Meldungen, Analysen.
- https://github.com/fastify/fastifyPACKAGE
- https://github.com/fastify/fastify/commit/62dde76f1f7aca76e38625fe8d983761f26e6fc9WEB
- https://github.com/fastify/fastify/security/advisories/GHSA-3fjj-p79j-c9hhWEB
- https://nvd.nist.gov/vuln/detail/CVE-2022-41919ADVISORY
- https://www.npmjs.com/package/@fastify/csrfWEB
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