Categories: Misc
URL: glotch-1.play.hfsc.tf:11223
It seems the challenge wants us to play and solve.Don’t be fooled by its apparent simplicity.
Although it was not visible because the CTF had ended, the flag could be seen illegibly in the middle of the site 😉
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Glotchy Flag</title>
<style>
body, html {
margin: 0;
padding: 0;
width: 100%;
height: 100%;
overflow: hidden;
background-image: url('/bg.gif');
background-size: cover;
background-position: center;
background-repeat: no-repeat;
display: flex;
align-items: center;
justify-content: center;
}
.image-container {
width: 90%;
max-width: 2100px;
display: flex;
align-items: center;
justify-content: center;
}
#challengeImage {
max-width: 100%;
height: auto;
object-fit: contain;
image-rendering: pixelated; /* Keeps pixels sharp */
image-rendering: -moz-crisp-edges;
image-rendering: crisp-edges;
}
</style>
</head>
<body>
<div class="image-container">
<img id="challengeImage" src="/flag.png" alt="Fr33 Fl4G!">
</div>
</body>
</html>Of course, download /flag.png (free flag is not cheap) and see what’s going on.
It’s definitely a flag that’s not fully understood. It seems possible to access the flag by changing the image using image manipulation tools.
But flag.png still does not give a full flag. So I decided to try another image tool. I definitely tried a lot of different flags and finally decided on this one.
