CVE-2023-51701: @fastify-reply-from JSON Content-Type parsing confusion
First published: Mon Jan 08 2024(Updated: )
### Impact The main repo of fastify use [fast-content-type-parse](https://github.com/fastify/fast-content-type-parse) to parse request Content-Type, which will [trim after split](https://github.com/fastify/fast-content-type-parse/blob/2776d054dd48e9ce40b8d5e5ff9b46fee82b95f1/index.js#L59). The [fastify-reply-from](https://github.com/fastify/fastify-reply-from/blob/b79a22d6eb9a0b52cfbe8eb2cb22ad65f5a39e64/index.js#L118C14-L118C14) have not use this repo to unify the parse of Content-Type, which [won't trim](https://github.com/fastify/fastify-reply-from/blob/b79a22d6eb9a0b52cfbe8eb2cb22ad65f5a39e64/index.js#L118C14-L118C14). As a result, 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. ### Patches `@fastify/reply-from` v9.6.0 include the fix. ### Workarounds There are no known workarounds. ### References Hackerone Report: https://hackerone.com/reports/2295770.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| npm/@fastify/reply-from | <9.6.0 | 9.6.0 |
| Fastify Reply-from | <9.6.0 |
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Reference Links
- https://github.com/fastify/fastify-reply-from/security/advisories/GHSA-v2v2-hph8-q5xp
- https://github.com/fastify/fastify-reply-from/commit/cbd7c17c09e6476268e34f5e499a6b923e8acc18
- https://github.com/fastify/fastify-reply-from/releases/tag/v9.6.0
- https://nvd.nist.gov/vuln/detail/CVE-2023-51701
- https://github.com/advisories/GHSA-v2v2-hph8-q5xp (Advisory)
Frequently Asked Questions
What is the severity of CVE-2023-51701?
CVE-2023-51701 is classified as a moderate severity vulnerability.
How do I fix CVE-2023-51701?
To fix CVE-2023-51701, upgrade the @fastify/reply-from package to version 9.6.0 or later.
What is the impact of CVE-2023-51701?
The impact of CVE-2023-51701 involves issues with parsing the Content-Type of requests which can lead to unexpected behavior.
Which versions are affected by CVE-2023-51701?
Versions of @fastify/reply-from prior to 9.6.0 are affected by CVE-2023-51701.
Is CVE-2023-51701 related to the fastify framework?
Yes, CVE-2023-51701 is related to the fastify framework, specifically its use of the fast-content-type-parse module.
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