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# TryHackMe-Nax
## NMAP
```
Host is up (0.45s latency).
Not shown: 995 closed ports
PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 7.2p2 Ubuntu 4ubuntu2.8 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey:
| 2048 62:1d:d9:88:01:77:0a:52:bb:59:f9:da:c1:a6:e3:cd (RSA)
| 256 af:67:7d:24:e5:95:f4:44:72:d1:0c:39:8d:cc:21:15 (ECDSA)
|_ 256 20:28:15:ef:13:c8:9f:b8:a7:0f:50:e6:2f:3b:1e:57 (ED25519)
25/tcp open smtp Postfix smtpd
|_smtp-commands: ubuntu.localdomain, PIPELINING, SIZE 10240000, VRFY, ETRN, STARTTLS, ENHANCEDSTATUSCODES, 8BITMIME, DSN,
|_ssl-date: TLS randomness does not represent time
80/tcp open http Apache httpd 2.4.18 ((Ubuntu))
|_http-server-header: Apache/2.4.18 (Ubuntu)
|_http-title: Site doesn't have a title (text/html).
389/tcp open ldap OpenLDAP 2.2.X - 2.3.X
443/tcp open ssl/http Apache httpd 2.4.18 ((Ubuntu))
|_http-server-header: Apache/2.4.18 (Ubuntu)
|_http-title: 400 Bad Request
| ssl-cert: Subject: commonName=192.168.85.153/organizationName=Nagios Enterprises/stateOrProvinceName=Minnesota/countryName=US
| Not valid before: 2020-03-24T00:14:58
|_Not valid after: 2030-03-22T00:14:58
|_ssl-date: TLS randomness does not represent time
| tls-alpn:
|_ http/1.1
Service Info: Host: ubuntu.localdomain; OS: Linux; CPE: cpe:/o:linux:linux_kernel
Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 95.23 seconds
```
## PORT 80
If we go to port 80 we'll see a figure with some ASCII characters and on the bottom we will see some periodic table elements
<img src="https://imgur.com/HWq8nZG.png"/>
If we do some fuzzing we will only be able to find `index.php` which is a login page for nagios XI
<img src="https://imgur.com/M6Yowgq.png"/>
<img src="https://imgur.com/ZsIINj4.png"/>
I tried using default credentials like `root` : `password` , `admin` `admin` , `admin` : `password` none of them worked , I also tried changing the cookie value but this was the message I got when I tried to login with that
<img src="https://imgur.com/TCmc0bS.png"/>
Tried searching the `nagiosxi` directory but no look because I can't access them without being logged in !
<img src="https://imgur.com/EHIiNcN.png"/>
Going back to the webpage where we saw the elements we know that these elements have atomic numbers
<img src="https://imgur.com/Amm7mov.png"/>
Do this for all elements and get thier atomic numbers
Ag - 47
Hg - 80
Ta - 73
Sb - 51
Po - 84
Pd - 46
Hg - 80
Pt - 78
Lr - 103
Now I tried to merge those numbers in a string `47480735184468078103` put it in cyberchef and tried convert from decimal,hex,base64.32 and all but couldn't find anything but then I had a hunch that these numbers might lead to an ASCII conversion of letters
<img src="https://imgur.com/c5PVfm0.png"/>
47 - /
80 - P
73 - I
51 - 3
84 - T
46 - .
80 - P
78 - N
103 - g
So now combining them `/PI3T.PNg`
<img src="https://imgur.com/A8TKWHh.png"/>
Using an online piet interpreter we'll get an error
<img src="https://imgur.com/PFwBLbl.png"/>
First convert it to `.png` and then upload it to online interpreter for piet
<img src="https://imgur.com/EBawCiq.png"/>
nagiosadmin: n3p3UQ&9BjLp4$7uhWdY
These are the credentials
<img src="https://imgur.com/tyNfqXl.png"/>
Now for the CVE
<img src="https://imgur.com/BRmcbDq.png"/>
So we have found the exploit which is authenticated RCE and it is a metasploit exploit
<img src="https://imgur.com/PzUaNa4.png"/>
<img src="https://imgur.com/avv0XU5.png"/>