File-Upload

Overview Chamilo LMS 1.11.24, Ubuntu 22.04. Release: 2024-07-06. Retire: 2024-11-02. IP: 10.10.10.x. Chain: unauthenticated file upload to RCE (CVE-2023-4220), a reused Chamilo database password for the mtz system account, then a symlink-following sudo ACL script for root. Reconnaissance Port scan 1 2 nmap -p- --min-rate 10000 10.10.10.x nmap -p 22,80 -sCV 10.10.10.x Open ports: 22/tcp: OpenSSH 8.9p1 (Ubuntu 22.04 jammy) 80/tcp: Apache 2.4.52, redirects to http://permx.htb Subdomain fuzzing The server routes HTTP requests by the Host header, so fuzz subdomains: ...

Overview Machine author: irogir. Main skills: side-channel enumeration (timing attack), mass assignment, LFI + PHP wrappers, arbitrary file upload (timestamp brute force), git history leak, Axel .axelrc misconfiguration for arbitrary file write as root. Chain: timing attack, user enumeration, password guess, mass assignment (role=1), LFI (image.php), php://filter (source disclosure), arbitrary upload + MD5(time()) brute force, RCE, git log in a backup, password reuse, SSH as aaron, sudo netutils (axel), .axelrc default_filename, overwrite /root/.ssh/authorized_keys, SSH as root. ...