Introduction Target: 10.10.10.25(Linux) Kali: 10.10.16.65 Holiday is an insane box officially. It’s really difficult to get the user permission. The most difficult part should be how to pass the XSS filter. It may need a lot of time. And the root privesc is based on the exploitation of npm install which is relatively fresh. Information enumeration As usual, use nmap to detect open ports and related services: nmap -A 10.10.10.25:

Introduction Target: 10.10.10.121(OS: Linux) Kali: 10.10.16.28 To be honest, Help is not a difficult box. But there are some rabbit holes in the box. And in some case, you may come across some very strange situations. May you should step back, find if there is something wrong. For the PrivEsc of root, never give up trying the most basic method. Infomation Enumeration Firstly, gather open ports and services: # Nmap 7.

Introduction Target: 10.10.10.68 (OS: Linux) Kali linux: 10.10.16.44 Information Enumeration Firstly, detect the open ports: # Nmap 7.70 scan initiated Wed Apr 3 20:48:43 2019 as: nmap -sT -p- --min-rate 10000 -oA openports 10.10.10.68 Warning: 10.10.10.68 giving up on port because retransmission cap hit (10). Nmap scan report for 10.10.10.68 Host is up (0.31s latency). Not shown: 39680 closed ports, 25854 filtered ports PORT STATE SERVICE 80/tcp open http Only port 80 is open, it may be an easy box.

Introduction Target: 10.10.10.75(OS: Linux) Kali linux: 10.10.16.44 Information Enumeration Firstly, detect the open ports: nmap -sT -p- --min-rate 10000 -oA openports 10.10.10.75 There are not too many open ports, just 80 and 22. Detect the detailed services of the open ports: nmap -sC -sV -oA services 10.10.10.75 Nothing special found. The only clue may be the open port of 80. To be honest, the box with less open ports is easier in general.

Introduction Target machine: 10.10.10.13(OS: linux) Kali linux: 10.10.16.44 Enumeration Firstly, detect the open ports: nmap -sT -p- --min-rate 10000 -oA openports 10.10.10.13 3 ports is open, detect the detailed services: namp -sV -sC -p22.53.80 -Pn -oA services 10.10.10.13 So we can conduct the relation of ports of ports and services as following: port service 53 DNS 22 ssh 80 http Exploitation http As the target machine provides http service, try to access http://10.