> For the complete documentation index, see [llms.txt](https://thomasbui.gitbook.io/blog/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://thomasbui.gitbook.io/blog/software-security/ctfs-write-ups/writeups-picoctf-collection/https-github.com-m14ghost-picoctf-2019-writeup/web-exploitation-1/logon.md).

# logon

Point: 100

## Category

Web Exploitation

## Question

The factory is hiding things from all of its users. Can you login as logon and find what they've been looking at? <https://2019shell1.picoctf.com/problem/12284/> [(link)](https://2019shell1.picoctf.com/problem/12284/) or <http://2019shell1.picoctf.com:12284>

## Hint

Hmm it doesn't seem to check anyone's password, except for 's?

## Solution

After login, We'll check source code but nothing to get.

We decided to check cookie of this website using [EditThisCookie](https://chrome.google.com/webstore/detail/editthiscookie/fngmhnnpilhplaeedifhccceomclgfbg?hl=en-US) extension on Google Chrome. We'll see a username: admin with value: False.

![EditThisCookie](https://github.com/m14ghost/PicoCTF-2019-Writeup/blob/master/Web%20Exploitation/Editthiscookie.png)

Try to change value to True then open source code again, we've got the flag

```bash
<!DOCTYPE html>
<html lang="en">

<head>
    <title>Factory Login</title>


    <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet">

    <link href="https://getbootstrap.com/docs/3.3/examples/jumbotron-narrow/jumbotron-narrow.css" rel="stylesheet">

    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

</head>

<body>

    <div class="container">
        <div class="header">
            <nav>
                <ul class="nav nav-pills pull-right">
                    <li role="presentation" class="active"><a href="/">Home</a>
                    </li>
                    <li role="presentation"><a href="/logout" class="btn btn-link pull-right">Sign Out</a>
                    </li>
                </ul>
            </nav>
            <h3 class="text-muted">Factory Login</h3>
        </div>

        <div class="jumbotron">
            <p class="lead"></p>
            <p style="text-align:center; font-size:30px;"><b>Flag</b>: <code>picoCTF{th3_c0nsp1r4cy_l1v3s_6f2c20e9}</code></p>
        </div>


        <footer class="footer">
            <p>&copy; PicoCTF 2019</p>
        </footer>

    </div>
</body>
</html>
```

## Flag

picoCTF{th3\_c0nsp1r4cy\_l1v3s\_6f2c20e9}


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