CVE-2023-51701: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

January 8, 2024

fastify-reply-from is a Fastify plugin to forward the current HTTP request to another server. A reverse proxy server built with @fastify/reply-from could misinterpret the incoming body by passing an header ContentType: application/json ; charset=utf-8. This can lead to bypass of security checks. This vulnerability has been patched in ‘@fastify/reply-from` version 9.6.0.

References

github.com/advisories/GHSA-v2v2-hph8-q5xp
github.com/fastify/fastify-reply-from/commit/cbd7c17c09e6476268e34f5e499a6b923e8acc18
github.com/fastify/fastify-reply-from/releases/tag/v9.6.0
github.com/fastify/fastify-reply-from/security/advisories/GHSA-v2v2-hph8-q5xp
nvd.nist.gov/vuln/detail/CVE-2023-51701

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