Pdfy Htb Writeup Upd __top__ Page

When you launch the target container and access the web application via your browser, you are presented with a simple webpage containing an input form. The Web Interface

Tip: If the direct file:// protocol is blocked or fails, you can host a simple redirect script on your own server (using Serveo to expose it) that redirects the HTB bot to the local file.

Now that we know we can read files, we need to find something sensitive. A common target is the Nginx or Apache configuration files to see if there are any hidden internal ports or applications running. pdfy htb writeup upd

This walkthrough demonstrates that the most effective way to learn penetration testing is by doing. PDFy is a perfect starting point for beginners to understand the attack surface of web applications and internal services, bridging the gap between theory and practice in a fun, gamified way.

When wkhtmltopdf converts a web page, it acts like a full-fledged browser. It parses HTML, executes JavaScript (to some extent), and resolves all referenced resources like images, stylesheets, and iframes. The core of the vulnerability is that wkhtmltopdf processes file:// URIs by default without proper restrictions. While modern versions may have additional sandboxing, version 0.12.5 is known to be susceptible to this attack. When you launch the target container and access

Using the SSRF, read the main PHP file that handles PDF generation.

The most common way to solve this is by using a PHP redirect . Create a .php file on your server that uses the header() function to redirect the incoming request to the target local file on the HTB server. Payload Example ( exploit.php ): Use code with caution. Copied to clipboard A common target is the Nginx or Apache

Download the generated PDF, and you will see the contents of the /etc/passwd file. Looking through the users, you should notice a user named . 4. Pivoting to the User Flag

: Leverage this behavior to trick the server into accessing its own internal files. 2. Identifying the Vulnerability

PDFy is a medium-to-hard Windows machine focused on LFI/initial foothold via a web application that processes PDFs, followed by privilege escalation through misconfigured services and credential reuse. This writeup outlines an updated, concise path to user and root flags.

<img src="file:///home/robert/user.txt">