Writeup Upd — Pdfy Htb

If you are stuck, try running similar PDF conversion tools (like wkhtmltopdf ) locally to see how they handle redirects.

Leak the contents of /etc/passwd to retrieve the hidden flag. Primary Vulnerability: SSRF via the wkhtmltopdf tool. 1. Initial Enumeration

Read local files or access internal metadata services. Step 1: Enumeration pdfy htb writeup upd

By examining the metadata of the generated PDF or observing error messages, the backend is identified as using wkhtmltopdf Test for SSRF: Entering a basic URL like

The PDFY challenge on Hack The Box is an excellent example of a multi-step exploitation process, requiring a combination of web application analysis, file system traversal, and system compromise. Throughout this writeup, we have demonstrated various techniques, including: If you are stuck, try running similar PDF

This means the application implements a blocklist or a basic validation filter to prevent standard local lookups. To bypass this restriction, we need to look at how the application handles redirects. Inspecting the PDF Metadata

The exploitation phase involves using the information gathered during enumeration to gain access to the system. import socket import os

import socket import os