GHSA-455W-C45V-86RG

Vulnerability from github – Published: 2022-10-11 13:45 – Updated: 2022-10-11 13:45
VLAI?
Summary
fastify vulnerable to denial of service via malicious Content-Type
Details

Impact

An attacker can send an invalid Content-Type header that can cause the application to crash, leading to a possible Denial of Service attack. Only the v4.x line is affected.

(This was updated: upon a close inspection, v3.x is not affected after all).

Patches

Yes, update to > v4.8.0.

Workarounds

You can reject the malicious content types before the body parser enters in action.

  const badNames = Object.getOwnPropertyNames({}.__proto__)
  fastify.addHook('onRequest', async (req, reply) => {
    for (const badName of badNames) {
      if (req.headers['content-type'].indexOf(badName) > -1) {
        reply.code(415)
        throw new Error('Content type not supported')
      }
    }
  })

References

See the HackerOne report #1715536

For more information

Fastify security policy

Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "fastify"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0"
            },
            {
              "fixed": "4.8.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-39288"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-754"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-10-11T13:45:14Z",
    "nvd_published_at": "2022-10-10T21:15:00Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nAn attacker can send an invalid `Content-Type` header that can cause the application to crash, leading to a possible Denial of Service attack. Only the v4.x line is affected.\n\n(This was updated: upon a close inspection, v3.x is not affected after all).\n\n### Patches\nYes, update to `\u003e v4.8.0`.\n\n### Workarounds\nYou can reject the malicious content types before the body parser enters in action.\n```js\n  const badNames = Object.getOwnPropertyNames({}.__proto__)\n  fastify.addHook(\u0027onRequest\u0027, async (req, reply) =\u003e {\n    for (const badName of badNames) {\n      if (req.headers[\u0027content-type\u0027].indexOf(badName) \u003e -1) {\n        reply.code(415)\n        throw new Error(\u0027Content type not supported\u0027)\n      }\n    }\n  })\n```\n\n### References\n\nSee the HackerOne report [#1715536](https://hackerone.com/bugs?report_id=1715536\u0026subject=fastify)\n\n### For more information\n[Fastify security policy](https://github.com/fastify/fastify/security/policy)\n",
  "id": "GHSA-455w-c45v-86rg",
  "modified": "2022-10-11T13:45:14Z",
  "published": "2022-10-11T13:45:14Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/fastify/fastify/security/advisories/GHSA-455w-c45v-86rg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-39288"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fastify/fastify/commit/fbb07e8dfad74c69cd4cd2211aedab87194618e3"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/fastify/fastify"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fastify/fastify/security/policy"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/bugs?report_id=1715536\u0026subject=fastify"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "fastify vulnerable to denial of service via malicious Content-Type"
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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