[DreamHack] 64se64 Write-up
2024. 12. 27. 14:51ㆍ보안/misc
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소스를 보고 flag를 획득하라고 한다.
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Welcome</title>
</head>
<body>
<h1>Welcome! 👋</h1>
<form method="POST">
<input type="hidden" name="64se64_encoding" value="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">
</form>
</body>
</html>
base64로 인코딩했다고 친절하게 알려주니 바로 디코딩해주자.
코드가 나온다.
그대로 실행해주면 구할 수 있다.
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