CVE-2022-41919: Fastify Incorrect Content-Type Parsing Can Lead Vulnerability

MODERATE
Advisory Identifier: GHSA-3fjj-p79j-c9hh
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CVSS 4.2
CWE-352
Published
Advisory Summary

CVE-2022-41919 is a MODERATE (CVSS 4.2) incorrect content-type parsing can lead vulnerability (CWE-352: Cross-Site Request Forgery (CSRF)) affecting Fastify libraries in the npm ecosystem. The issue involves incorrect content-type parsing can lead to csrf attack. Remediation is available by upgrading affected packages to version 4.10.2, 3.29.4.

CVE-2022-41919 at a Glance

CVE Identifier CVE-2022-41919
GHSA Identifier GHSA-3fjj-p79j-c9hh
Severity MODERATE
CVSS v3.1 Base Score 4.2
CWE Classification CWE-352: Cross-Site Request Forgery (CSRF)
Affected Product Fastify
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 4.2

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2022-41919

To remediate this vulnerability, upgrade all affected Fastify dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

fastify fixed: 4.10.2 
npm install fastify@4.10.2
fastify fixed: 3.29.4 
npm install fastify@3.29.4
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls fastify

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2022-41919, inspect your project dependencies using npm:

npm ls fastify

Analyze the terminal output to locate any version of Fastify in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.10.2), your application is affected.

Note: The npm ls fastify command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-352: Cross-Site Request Forgery (CSRF), where the web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor. In Fastify, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### 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)

CVE-2022-41919 Affected Fastify Versions

2 component(s)
Fixed Versions:
4.10.23.29.4
Product / Package Ecosystem Affected Versions Fixed Version
fastify
npm/fastify
npm
≥ 4.0.0
< 4.10.2
4.10.2
fastify
npm/fastify
npm
≥ 3.0.0
< 3.29.4
3.29.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/fastify/fastify/security/advisories/GHSA-3fjj-p79j-c9hh
NVD — CVE-2022-41919 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-41919
Security Fix Commit FIX COMMIT
https://github.com/fastify/fastify/commit/62dde76f1f7aca76e38625fe8d983761f26e6fc9
Fastify Source Repository REPOSITORY
https://github.com/fastify/fastify
www.npmjs.com/package/@fastify/cs... WEB
https://www.npmjs.com/package/@fastify/csrf

Frequently Asked Questions

What is CVE-2022-41919?
CVE-2022-41919 is a security vulnerability in Fastify involving Incorrect Content-Type parsing can lead to CSRF attack under CWE-352: Cross-Site Request Forgery (CSRF).
Which Fastify versions are affected?
Affected versions include releases prior to 4.10.2, 3.29.4 across affected packages: fastify.
What version fixes CVE-2022-41919?
Upgrading to 4.10.2, 3.29.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is fastify affected?
Yes, fastify is affected in releases prior to 4.10.2, 3.29.4. Upgrade your dependency to 4.10.2, 3.29.4 or later.
What is the CVSS score of CVE-2022-41919?
CVE-2022-41919 has a CVSS v3.1 base score of 4.2 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N.
What CWE is associated with CVE-2022-41919?
CVE-2022-41919 is classified under CWE-352: Cross-Site Request Forgery (CSRF) (The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.).
How can I check npm dependencies for CVE-2022-41919?
Run the dependency tree command: 'npm ls fastify'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-3fjj-p79j-c9hh",
  "modified" : "2022-11-28T16:17:34Z",
  "published" : "2022-11-21T22:28:11Z",
  "aliases" : [ "CVE-2022-41919" ],
  "summary" : "Fastify: Incorrect Content-Type parsing can lead to CSRF attack ",
  "details" : "### Impact\n\nThe 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.\n\n### Patches\nFor `4.x` users, please update to at least `4.10.2`\nFor `3.x` users, please update to at least `3.29.4`\n\n### Workarounds\n\nImplement Cross-Site Request Forgery protection using [`@fastify/csrf`](https://www.npmjs.com/package/@fastify/csrf).\n\n### References\n\nCheck out the HackerOne report: https://hackerone.com/reports/1763832.\n\n### For more information\n\n[Fastify security policy](https://github.com/fastify/fastify/security/policy)\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "fastify"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.10.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "fastify"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "3.29.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/fastify/fastify/security/advisories/GHSA-3fjj-p79j-c9hh"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-41919"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/fastify/fastify/commit/62dde76f1f7aca76e38625fe8d983761f26e6fc9"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/fastify/fastify"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/package/@fastify/csrf"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-352" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2022-11-21T22:28:11Z",
    "nvd_published_at" : "2022-11-22T20:15:00Z"
  }
}