Crackerfg !!better!! Official

Here’s a short write-up for , based on the likely context of a cybersecurity CTF or penetration testing challenge (commonly seen on platforms like HackTheBox, TryHackMe, or a custom box). CrackerFG – Write-up CrackerFG is a medium-difficulty challenge that combines web enumeration , weak password storage , and privilege escalation via misconfigured binaries. Below is a step-by-step solution. 1. Reconnaissance Start with an Nmap scan:

Stable shell:

Dashboard reveals a file upload feature for "FG (Fingerprint Generator)" scripts ( .fg files). Upload restrictions: only txt and fg . Upload a malicious .fg file: crackerfg

echo '#!/bin/bash' > /tmp/hashgen echo 'chmod 777 /root/root.txt' >> /tmp/hashgen chmod +x /tmp/hashgen export PATH=/tmp:$PATH sudo /usr/bin/crackerfg Now /root/root.txt is readable. Here’s a short write-up for , based on

Use gobuster :

Check path hijacking:

sudo -l User www-data can run /usr/bin/crackerfg as root without password. Upload a malicious