{"id":52168,"date":"2019-11-02T00:00:00","date_gmt":"2019-11-01T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/mozilla-cloudflare-i-facebook-predstavili-tls-rasshirenie-dlya-delegirovaniya-korotkozhivushhih-sertifikatov"},"modified":"2020-02-18T13:59:50","modified_gmt":"2020-02-18T10:59:50","slug":"mozilla-cloudflare-i-facebook-predstavili-tls-rasshirenie-dlya-delegirovaniya-korotkozhivushhih-sertifikatov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/mozilla-cloudflare-i-facebook-predstavili-tls-rasshirenie-dlya-delegirovaniya-korotkozhivushhih-sertifikatov","title":{"rendered":"A Mozilla, a Cloudflare \u00e9s a Facebook bemutatt\u00e1k a TLS-kiterjeszt\u00e9st a r\u00f6vid \u00e9lettartam\u00fa tan\u00fas\u00edtv\u00e1nyok deleg\u00e1l\u00e1s\u00e1hoz.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Mozilla<\/a><\/noindex>, Cloudflare<\/a><\/noindex> \u00e9s Facebook<\/a><\/noindex> k\u00f6z\u00f6sen bejelentett\u00e9k az \u00faj TLS-kiterjeszt\u00e9st Deleg\u00e1lt Hiteles\u00edt\u0151k<\/a><\/noindex> (DC), amely megold\u00e1st k\u00edn\u00e1l a tan\u00fas\u00edtv\u00e1nyokkal kapcsolatos probl\u00e9m\u00e1kra a weboldalak tartalomeloszt\u00f3 h\u00e1l\u00f3zatokon kereszt\u00fcli el\u00e9r\u00e9s\u00e9n\u00e9l. Az arra jogosult hat\u00f3s\u00e1gok \u00e1ltal kiadott tan\u00fas\u00edtv\u00e1nyok hossz\u00fa \u00e9rv\u00e9nyess\u00e9gi id\u0151vel rendelkeznek, ami neh\u00e9zs\u00e9geket okoz, ha a weboldal k\u00fcls\u0151 szolg\u00e1ltat\u00e1sok r\u00e9v\u00e9n kell el\u00e9rni, mivel a tan\u00fas\u00edtv\u00e1ny \u00e1tad\u00e1sa a k\u00fcls\u0151 szolg\u00e1ltat\u00f3nak tov\u00e1bbi biztons\u00e1gi fenyeget\u00e9seket jelent. <\/p>\n

Az \u00faj kiterjeszt\u00e9s hasznos lehet olyan weboldalak sz\u00e1m\u00e1ra is, amelyeket nagy elosztott infrastrukt\u00far\u00e1k m\u0171k\u00f6dtetnek, sok terhel\u00e9seloszt\u00f3val. A Deleg\u00e1lt Hiteles\u00edt\u0151k elker\u00fcli a f\u0151 tan\u00fas\u00edtv\u00e1nyok priv\u00e1t kulcsainak m\u00e1solatainak t\u00e1rol\u00e1s\u00e1t a tartalomszolg\u00e1ltat\u00f3 csom\u00f3pontokon. Hagyom\u00e1nyos megk\u00f6zel\u00edt\u00e9ssel egy sikeres t\u00e1mad\u00e1s b\u00e1rmely, a HTTPS-forgalom szolg\u00e1ltat\u00e1s\u00e1ban r\u00e9szt vev\u0151 szerver ellen a tan\u00fas\u00edtv\u00e1ny teljes kompromitt\u00e1l\u00e1s\u00e1hoz vezet. A priv\u00e1t kulcsok tartalomeloszt\u00f3 h\u00e1l\u00f3zatoknak val\u00f3 \u00e1tad\u00e1sa sor\u00e1n adatlop\u00e1si fenyeget\u00e9sek l\u00e9phetnek fel a szem\u00e9lyzet, a titkosszolg\u00e1latok vagy a CDN-infrastrukt\u00fara kompromitt\u00e1l\u00e1sa miatt. <\/p>\n

Ha a kulcsok kompromitt\u00e1l\u00e1sa \u00e9szrev\u00e9tlen marad, a kulcsokhoz f\u00e9r\u0151 szem\u00e9lyek hossz\u00fa ideig \u00e9szrev\u00e9tlen\u00fcl be tudnak avatkozni a weboldal forgalm\u00e1ba (MITM), mivel a tan\u00fas\u00edtv\u00e1nyok \u00e9rv\u00e9nyess\u00e9gi ideje h\u00f3napokban \u00e9s \u00e9vekben m\u00e9rhet\u0151. A Cloudflare a tan\u00fas\u00edtv\u00e1nyok kulcsainak v\u00e9delm\u00e9re MITM v\u00e9grehajt\u00e1s\u00e1ra, de blokkol\u00f3dnak a Firefox tan\u00fas\u00edtv\u00e1ny-t\u00e1rol\u00f3j\u00e1nak haszn\u00e1latakor);<\/a><\/noindex> speci\u00e1lis kulcsszervereket haszn\u00e1l, amelyek a weboldal tulajdonos\u00e1nak oldal\u00e1n m\u0171k\u00f6dnek, de ez a m\u00f3d \u00e9rezhet\u0151 k\u00e9s\u00e9seket eredm\u00e9nyez a forgalom \u00e1tvitel\u00e9ben, cs\u00f6kkenti a megb\u00edzhat\u00f3s\u00e1got a tov\u00e1bbi l\u00e1ncszem megjelen\u00e9se miatt, \u00e9s bonyolult infrastrukt\u00fara ki\u00e9p\u00edt\u00e9s\u00e9t ig\u00e9nyli.<\/p>\n

A javasolt TLS-kiterjeszt\u00e9s, a Deleg\u00e1lt Hiteles\u00edt\u0151k, bevezet egy tov\u00e1bbi k\u00f6ztes priv\u00e1t kulcsot, amelynek \u00e9rv\u00e9nyess\u00e9gi ideje \u00f3r\u00e1kban vagy n\u00e9h\u00e1ny napban korl\u00e1toz\u00f3dik (maximum 7 nap). Ez a kulcs a kiadott tan\u00fas\u00edtv\u00e1ny alapj\u00e1n gener\u00e1l\u00f3dik, \u00e9s lehet\u0151v\u00e9 teszi az eredeti tan\u00fas\u00edtv\u00e1ny priv\u00e1t kulcs\u00e1nak titokban tart\u00e1s\u00e1t a tartalomeloszt\u00f3 szolg\u00e1ltat\u00e1sok el\u0151tt, csak egy r\u00f6vid \u00e9lettartam\u00fa ideiglenes tan\u00fas\u00edtv\u00e1nyt biztos\u00edtva sz\u00e1mukra. <\/p>\n

\"A<\/a><\/noindex><\/center><\/p>\n

Annak \u00e9rdek\u00e9ben, hogy elker\u00fclj\u00fck a hozz\u00e1f\u00e9r\u00e9si probl\u00e9m\u00e1kat az \u00e1tmeneti kulcs \u00e9lettartam\u00e1nak lej\u00e1rata ut\u00e1n, az eredeti TLS-szerveren v\u00e9grehajtott automatikus friss\u00edt\u00e9si technol\u00f3gia ker\u00fclt bevezet\u00e9sre. A gener\u00e1l\u00e1shoz nem sz\u00fcks\u00e9ges manu\u00e1lis m\u0171velet vagy szkriptek futtat\u00e1sa \u2014 az enged\u00e9lyezett szerver, amelynek sz\u00fcks\u00e9ge van a mag\u00e1nkulcsra, az el\u0151z\u0151 kulcs \u00e9lettartam\u00e1nak lej\u00e1rta el\u0151tt kapcsolatba l\u00e9p a webhely eredeti TLS-szerver\u00e9vel, \u00e9s az gener\u00e1l egy \u00faj \u00e1tmeneti kulcsot egy \u00fajabb r\u00f6vid id\u0151szakra.<\/p>\n

\"A<\/a><\/noindex><\/center><\/p>\n

A TLS-kiterjeszt\u00e9st t\u00e1mogat\u00f3 Delegated Credentials b\u00f6ng\u00e9sz\u0151k megb\u00edzhat\u00f3nak fogj\u00e1k tekinteni az ilyen sz\u00e1rmaztatott tan\u00fas\u00edtv\u00e1nyokat. P\u00e9ld\u00e1ul a megadott kiterjeszt\u00e9s t\u00e1mogat\u00e1sa m\u00e1r hozz\u00e1 lett adva a Firefox \u00e9jszakai kiad\u00e1saihoz \u00e9s b\u00e9taverzi\u00f3ihoz, \u00e9s az aktiv\u00e1lhat\u00f3 az about:config-ben a 'security.tls.enable_delegated_credentials' be\u00e1ll\u00edt\u00e1s m\u00f3dos\u00edt\u00e1s\u00e1val. November k\u00f6zep\u00e9n egy bizonyos h\u00e1nyad\u00fa Firefox b\u00e9taverzi\u00f3kat haszn\u00e1l\u00f3 felhaszn\u00e1l\u00f3 k\u00f6z\u00f6tt k\u00eds\u00e9rletet terveznek.TLS Deleg\u00e1lt Hiteles\u00edt\u0151k K\u00eds\u00e9rlet<\/a><\/noindex>A k\u00eds\u00e9rlet keret\u00e9ben a DC Cloudflare szerverre egy tesztk\u00e9r\u00e9s fog eljutni az \u00faj TLS-kiterjeszt\u00e9s megval\u00f3s\u00edt\u00e1s\u00e1nak ellen\u0151rz\u00e9s\u00e9re. A Delegated Credentials t\u00e1mogat\u00e1sa m\u00e1r szint\u00e9n be\u00e9p\u00edt\u00e9sre ker\u00fclt a k\u00f6nyvt\u00e1rba. Fizz<\/a><\/noindex> a TLS 1.3 implement\u00e1ci\u00f3j\u00e1val.<\/p>\n

A Deleg\u00e1lt Hiteles\u00edt\u0151k specifik\u00e1ci\u00f3j\u00e1t az IETF (Internet Engineering Task Force) bizotts\u00e1gnak adt\u00e1k \u00e1t, amely az Internet protokolljainak \u00e9s architekt\u00far\u00e1j\u00e1nak fejleszt\u00e9s\u00e9vel foglalkozik, \u00e9s jelenleg draft<\/a><\/noindex>fokozatban van, amely ig\u00e9nyt tart az internetes szabv\u00e1ny c\u00edmre. A Deleg\u00e1lt Hiteles\u00edt\u0151k kiterjeszt\u00e9st csak a TLSv1.3-mal egy\u00fctt lehet alkalmazni.
\nA k\u00f6ztes kulcsok gener\u00e1l\u00e1s\u00e1hoz TLS-tan\u00fas\u00edtv\u00e1ny sz\u00fcks\u00e9ges, amely tartalmaz egy k\u00fcl\u00f6nleges X.509 kiterjeszt\u00e9st, amelyet eddig csak a DigiCert tan\u00fas\u00edtv\u00e1nykezel\u0151 t\u00e1mogat. <\/p>\n

<\/a><\/noindex><\/p>\n

Forr\u00e1s: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

Mozilla, Cloudflare \u0438 Facebook \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u043d\u043e \u0430\u043d\u043e\u043d\u0441\u0438\u0440\u043e\u0432\u0430\u043b\u0438 \u043d\u043e\u0432\u043e\u0435 TLS-\u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u0435 Delegated Credentials (DC), \u0440\u0435\u0448\u0430\u044e\u0449\u0435\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443 c \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u0430\u043c\u0438 \u043f\u0440\u0438 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0441\u0430\u0439\u0442\u0443 \u0447\u0435\u0440\u0435\u0437 \u0441\u0435\u0442\u0438 \u0434\u043e\u0441\u0442\u0430\u0432\u043a\u0438 \u043a\u043e\u043d\u0442\u0435\u043d\u0442\u0430. \u0412\u044b\u0434\u0430\u0432\u0430\u0435\u043c\u044b\u0435 \u0443\u0434\u043e\u0441\u0442\u043e\u0432\u0435\u0440\u044f\u044e\u0449\u0438\u043c\u0438 \u0446\u0435\u043d\u0442\u0440\u0430\u043c\u0438 \u0441\u0435\u0440\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u044b \u0438\u043c\u0435\u044e\u0442 \u0434\u043b\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0441\u0440\u043e\u043a \u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f, \u0447\u0442\u043e \u0441\u043e\u0437\u0434\u0430\u0451\u0442 \u0442\u0440\u0443\u0434\u043d\u043e\u0441\u0442\u0438 \u043f\u0440\u0438 \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e\u0441\u0442\u0438 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0441\u0430\u0439\u0442\u0443 \u0447\u0435\u0440\u0435\u0437 \u0441\u0442\u043e\u0440\u043e\u043d\u043d\u0438\u0439 \u0441\u0435\u0440\u0432\u0438\u0441, \u043e\u0442 \u043b\u0438\u0446\u0430 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u0434\u043e\u043b\u0436\u043d\u043e \u0443\u0441\u0442\u0430\u043d\u0430\u0432\u043b\u0438\u0432\u0430\u0442\u044c\u0441\u044f \u0437\u0430\u0449\u0438\u0449\u0451\u043d\u043d\u043e\u0435 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