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https://github.com/AbdullahRizwan101/CTF-Writeups
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116 lines
4.5 KiB
Markdown
116 lines
4.5 KiB
Markdown
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# TryHackMe-Nax
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## NMAP
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```
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Host is up (0.45s latency).
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Not shown: 995 closed ports
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PORT STATE SERVICE VERSION
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22/tcp open ssh OpenSSH 7.2p2 Ubuntu 4ubuntu2.8 (Ubuntu Linux; protocol 2.0)
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| ssh-hostkey:
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| 2048 62:1d:d9:88:01:77:0a:52:bb:59:f9:da:c1:a6:e3:cd (RSA)
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| 256 af:67:7d:24:e5:95:f4:44:72:d1:0c:39:8d:cc:21:15 (ECDSA)
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|_ 256 20:28:15:ef:13:c8:9f:b8:a7:0f:50:e6:2f:3b:1e:57 (ED25519)
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25/tcp open smtp Postfix smtpd
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|_smtp-commands: ubuntu.localdomain, PIPELINING, SIZE 10240000, VRFY, ETRN, STARTTLS, ENHANCEDSTATUSCODES, 8BITMIME, DSN,
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|_ssl-date: TLS randomness does not represent time
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80/tcp open http Apache httpd 2.4.18 ((Ubuntu))
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|_http-server-header: Apache/2.4.18 (Ubuntu)
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|_http-title: Site doesn't have a title (text/html).
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389/tcp open ldap OpenLDAP 2.2.X - 2.3.X
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443/tcp open ssl/http Apache httpd 2.4.18 ((Ubuntu))
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|_http-server-header: Apache/2.4.18 (Ubuntu)
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|_http-title: 400 Bad Request
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| ssl-cert: Subject: commonName=192.168.85.153/organizationName=Nagios Enterprises/stateOrProvinceName=Minnesota/countryName=US
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| Not valid before: 2020-03-24T00:14:58
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|_Not valid after: 2030-03-22T00:14:58
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|_ssl-date: TLS randomness does not represent time
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| tls-alpn:
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|_ http/1.1
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Service Info: Host: ubuntu.localdomain; OS: Linux; CPE: cpe:/o:linux:linux_kernel
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Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
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Nmap done: 1 IP address (1 host up) scanned in 95.23 seconds
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```
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## PORT 80
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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
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<img src="https://imgur.com/HWq8nZG.png"/>
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If we do some fuzzing we will only be able to find `index.php` which is a login page for nagios XI
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<img src="https://imgur.com/M6Yowgq.png"/>
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<img src="https://imgur.com/ZsIINj4.png"/>
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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
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<img src="https://imgur.com/TCmc0bS.png"/>
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Tried searching the `nagiosxi` directory but no look because I can't access them without being logged in !
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<img src="https://imgur.com/EHIiNcN.png"/>
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Going back to the webpage where we saw the elements we know that these elements have atomic numbers
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<img src="https://imgur.com/Amm7mov.png"/>
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Do this for all elements and get thier atomic numbers
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Ag - 47
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Hg - 80
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Ta - 73
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Sb - 51
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Po - 84
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Pd - 46
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Hg - 80
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Pt - 78
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Lr - 103
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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
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<img src="https://imgur.com/c5PVfm0.png"/>
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47 - /
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80 - P
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73 - I
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51 - 3
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84 - T
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46 - .
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80 - P
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78 - N
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103 - g
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So now combining them `/PI3T.PNg`
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<img src="https://imgur.com/A8TKWHh.png"/>
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Using an online piet interpreter we'll get an error
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<img src="https://imgur.com/PFwBLbl.png"/>
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First convert it to `.png` and then upload it to online interpreter for piet
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<img src="https://imgur.com/EBawCiq.png"/>
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nagiosadmin: n3p3UQ&9BjLp4$7uhWdY
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These are the credentials
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<img src="https://imgur.com/tyNfqXl.png"/>
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Now for the CVE
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<img src="https://imgur.com/BRmcbDq.png"/>
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So we have found the exploit which is authenticated RCE and it is a metasploit exploit
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<img src="https://imgur.com/PzUaNa4.png"/>
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<img src="https://imgur.com/avv0XU5.png"/>
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