From there, I’ll identify a script that’s running whenever someone logs in over SSH.
Testout lab tutorial trial#
Still, some trial and error pays off, and results in a shell. This is relatively simple to find, but getting the fonts correct to exploit the vulnerability is a bit tricky. The first is to find a online image OCR website that is vulnerable to server-side template injection (SSTI) via the OCRed text in the image. Htb-late ctf hackthebox nmap ocr flask kolourpaint tesseract burp-repeater ssti jinja2 payloadsallthethings linpeas pspy bash chattr lsattr extended-attributes youtube For root, there’s a binary to exploit, but it’s actually rather beginner if you skip the heap exploit and just use the arbitrary file write. With that token, I can upload videos, and I’ll exploit FFmpeg to get local file read (one line at a time!), and read the user’s SSH key. I’ll have to find and chain together a reflective cross site scripting (XSS), a client side template injection (CSTI), and a cross site request forgery (CSRF) to leak an admin’s token.
The initial web exploitation in Overgraph was really hard. Htb-overgraph ctf hackthebox nmap wfuzz vhost feroxbuster graphql angularjs otp nosql-injection graphql-playground graphql-voyager local-storage csti xss reflective-xss csrf ffmpeg ssrf local-file-read exploit patchelf ghidra checksec python gdb youtube pwntools
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