CVE-2024-23331: Vite Vite Dev Server Option `server.fs.deny` Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-c24v-8rfc-w8vw",
  "modified" : "2024-01-19T21:58:47Z",
  "published" : "2024-01-19T21:58:47Z",
  "aliases" : [ "CVE-2024-23331" ],
  "summary" : "Vite dev server option `server.fs.deny` can be bypassed when hosted on case-insensitive filesystem",
  "details" : "### Summary\n[Vite dev server option](https://vitejs.dev/config/server-options.html#server-fs-deny) `server.fs.deny` can be bypassed on case-insensitive file systems using case-augmented versions of filenames. Notably this affects servers hosted on Windows.\n\nThis bypass is similar to https://nvd.nist.gov/vuln/detail/CVE-2023-34092 -- with surface area reduced to hosts having case-insensitive filesystems.\n\n### Patches\nFixed in vite@5.0.12, vite@4.5.2, vite@3.2.8, vite@2.9.17\n\n### Details\nSince `picomatch` defaults to case-sensitive glob matching, but the file server doesn't discriminate; a blacklist bypass is possible. \n\nSee `picomatch`  usage, where `nocase` is defaulted to `false`: https://github.com/vitejs/vite/blob/v5.1.0-beta.1/packages/vite/src/node/server/index.ts#L632\n\nBy requesting raw filesystem paths using augmented casing, the matcher derived from `config.server.fs.deny` fails to block access to sensitive files. \n\n### PoC\n**Setup**\n1. Created vanilla Vite project using `npm create vite@latest` on a Standard Azure hosted Windows 10 instance. \n    - `npm run dev -- --host 0.0.0.0`\n    - Publicly accessible for the time being here: http://20.12.242.81:5173/ \n2. Created dummy secret files, e.g. `custom.secret` and `production.pem`\n3. Populated `vite.config.js` with\n```javascript\nexport default { server: { fs: { deny: ['.env', '.env.*', '*.{crt,pem}', 'custom.secret'] } } }\n```\n\n**Reproduction**\n1. `curl -s http://20.12.242.81:5173/@fs//`\n    - Descriptive error page reveals absolute filesystem path to project root\n2. `curl -s http://20.12.242.81:5173/@fs/C:/Users/darbonzo/Desktop/vite-project/vite.config.js`\n    - Discoverable configuration file reveals locations of secrets\n3. `curl -s http://20.12.242.81:5173/@fs/C:/Users/darbonzo/Desktop/vite-project/custom.sEcReT`\n    - Secrets are directly accessible using case-augmented version of filename\n\n**Proof**\n![Screenshot 2024-01-19 022736](https://user-images.githubusercontent.com/907968/298020728-3a8d3c06-fcfd-4009-9182-e842f66a6ea5.png)\n\n### Impact\n**Who**\n- Users with exposed dev servers on environments with case-insensitive filesystems\n\n**What**\n- Files protected by `server.fs.deny` are both discoverable, and accessible",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "vite"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.7.0"
      }, {
        "fixed" : "2.9.17"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.9.16"
    }
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "vite"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.0.0"
      }, {
        "fixed" : "3.2.8"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 3.2.7"
    }
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "vite"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.5.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 4.5.1"
    }
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "vite"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.0.0"
      }, {
        "fixed" : "5.0.12"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 5.0.11"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/vitejs/vite/security/advisories/GHSA-c24v-8rfc-w8vw"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-34092"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-23331"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vitejs/vite/commit/0cd769c279724cf27934b1270fbdd45d68217691"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vitejs/vite/commit/91641c4da0a011d4c5352e88fc68389d4e1289a5"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vitejs/vite/commit/a26c87d20f9af306b5ce3ff1648be7fa5146c278"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vitejs/vite/commit/eeec23bbc9d476c54a3a6d36e78455867185a7cb"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/vitejs/vite"
  }, {
    "type" : "WEB",
    "url" : "https://vitejs.dev/config/server-options.html#server-fs-deny"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-178", "CWE-200", "CWE-284" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-01-19T21:58:47Z",
    "nvd_published_at" : "2024-01-19T20:15:14Z"
  }
}