Pdfy Htb Writeup Upd

PDFy is an easy-rated web challenge that focuses on exploiting a Server-Side Request Forgery (SSRF) vulnerability in a web-to-PDF conversion tool [26]. 1. Enumeration

  • Log into web admin panel.
  • Access SMB share (smbclient) or use RDP/WinRM if enabled.
  • Unquoted service path vulnerabilities
  • Weak service permissions
  • Writable service executable locations
  • You craft a malicious Python script that generates a serialized payload containing a reverse shell command (e.g., os.system or subprocess).
  • You upload this payload to the server (via the internal API you discovered in the user phase or by writing it to a directory the

Get reverse shell:

Each section is broken into “Command → Explanation → Expected Output”, making it easy to follow without blindly copy-pasting. The author also adds “Why this works” callouts — for example, explaining how exiftool can embed malicious JavaScript into PDF metadata that gets executed by the server’s PDF parser. pdfy htb writeup upd

4. Post-Exploitation & Privilege Escalation

Once you have a shell as the www-data user, the goal is root access. PDFy is an easy-rated web challenge that focuses

Summary of Flags

| Flag Type | Location | Method | |-----------|----------|--------| | UPD (User Proof Data) | /home/robert/user.txt | LFI via SSRF in PDF generator | | RPD (Root Proof Data) | /root/root.txt | pdftex with -shell-escape sudo misconfiguration | Log into web admin panel

Check sudo:

Carrito de compra