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Official PDFy Discussion - Page 2 - Challenges - Hack The Box

Identifying within document generation systems.

This updated walkthrough details the mechanics of the vulnerability, initial enumeration, and how to execute a successful Local File Inclusion (LFI) payload via an SSRF redirect loop. 1. Vulnerability Analysis & Tooling pdfy htb writeup upd

On your publicly accessible web server, create a file (e.g., exploit.php ) with the following code:

Once connected, you’re www-data . Now, look for the flag.

# Close the socket s.close()

run

To find the flag, look for the unique root paths or user home directories exposed in the /etc/passwd dump. Modify the exploit.php file on your server to target the specific flag file destination (commonly /flag.txt or /root/flag.txt ): Use code with caution.

$ python -c 'import os; os.system("/bin/bash")' pdfy@pdfy:/$ sudo -l Matching Defaults entries for pdfy on pdfy: env_reset, env_keep += "COLORFGBG KDEDIR", mail_badpass, secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin\:/snap/bin Kindly Update According To Your Necessities And Requirements

This review will break down the writeup’s structure, technical depth, accuracy, and overall value for beginners and intermediate hackers alike.

Start a lightweight PHP server on your exploitation node to serve the script: php -S 0.0.0.0:8080 Use code with caution. Step 3: Triggering the SSRF Payload