{"id":39042,"date":"2019-10-31T22:27:33","date_gmt":"2019-10-31T19:27:33","guid":{"rendered":"https:\/\/prohoster.info\/blog\/usilenie-izolyatsii-mezhdu-sajtami-v-chrome\/"},"modified":"2019-10-31T22:27:33","modified_gmt":"2019-10-31T19:27:33","slug":"usilenie-izolyatsii-mezhdu-sajtami-v-chrome","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/usilenie-izolyatsii-mezhdu-sajtami-v-chrome","title":{"rendered":"A weboldalak k\u00f6z\u00f6tti szigetel\u00e9s fokoz\u00e1sa a Chrome-ban","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A Google v\u00e1llalat bejelentette<\/a><\/noindex> a Chrome-ban a m\u00f3d aktiv\u00e1l\u00e1sa weboldalak k\u00f6z\u00f6tti elszigetel\u00e9s<\/a><\/noindex>, amely biztos\u00edtja a k\u00fcl\u00f6nb\u00f6z\u0151 weboldalakr\u00f3l sz\u00e1rmaz\u00f3 oldalak feldolgoz\u00e1s\u00e1t elk\u00fcl\u00f6n\u00edtett, izol\u00e1lt folyamatokban. A weboldalak szint\u0171 elszigetel\u00e9s megv\u00e9di a felhaszn\u00e1l\u00f3t azokt\u00f3l a t\u00e1mad\u00e1sokt\u00f3l, amelyeket a weboldalon haszn\u00e1lt k\u00fcls\u0151 blokkok r\u00e9v\u00e9n lehet elk\u00f6vetni, mint p\u00e9ld\u00e1ul az iframe-befecskendez\u00e9s, vagy megakad\u00e1lyozza az adatlop\u00e1st legitim blokkok (p\u00e9ld\u00e1ul banki szolg\u00e1ltat\u00e1sokra vonatkoz\u00f3, ahol a felhaszn\u00e1l\u00f3 hiteles\u00edtve van) rosszindulat\u00fa weboldalakra t\u00f6rt\u00e9n\u0151 be\u00e1gyaz\u00e1s\u00e1val.<\/p>\n

A domainhez rendelt feldolgoz\u00f3k sz\u00e9tv\u00e1laszt\u00e1sakor minden folyamatban csak egy weboldal adatai tal\u00e1lhat\u00f3k, ami megnehez\u00edti a weboldal k\u00f6z\u00f6tti adatlop\u00e1sra ir\u00e1nyul\u00f3 t\u00e1mad\u00e1sok elk\u00f6vet\u00e9s\u00e9t. A Chrome asztali verzi\u00f3iban a hozz\u00e1f\u00e9r\u00e9s<\/a><\/noindex> a domainhez rendelt feldolgoz\u00f3k, nem pedig a lapok alapj\u00e1n, el\u0151sz\u00f6r megval\u00f3sult a Chrome 67<\/a><\/noindex>. A Chrome 77<\/a><\/noindex> hasonl\u00f3 m\u00f3dot aktiv\u00e1lt\u00e1k az Android platform sz\u00e1m\u00e1ra is.
\n

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

A mem\u00f3riaterhel\u00e9s cs\u00f6kkent\u00e9s\u00e9re az Androidon a weboldalak izol\u00e1l\u00e1si m\u00f3dja csak akkor aktiv\u00e1l\u00f3dik, ha a felhaszn\u00e1l\u00f3 jelsz\u00f3val jelentkezett be az oldalra. A Chrome megjegyzi a jelsz\u00f3haszn\u00e1latot, \u00e9s aktiv\u00e1lja a v\u00e9delmet minden tov\u00e1bbi weboldalra vonatkoz\u00f3an. A v\u00e9delem automatikusan vonatkozik azokra a n\u00e9pszer\u0171, el\u0151re defini\u00e1lt weboldalakra is, amelyeket a mobil felhaszn\u00e1l\u00f3k kedvelnek. A szelekt\u00edv aktiv\u00e1l\u00e1si m\u00f3dszer \u00e9s az \u00faj optimaliz\u00e1l\u00e1sok lehet\u0151v\u00e9 tett\u00e9k, hogy a folyamatban l\u00e9v\u0151 folyamatok sz\u00e1m\u00e1nak emelked\u00e9se miatt a mem\u00f3riafogyaszt\u00e1s n\u00f6veked\u00e9se \u00e1tlagosan 3-5% k\u00f6z\u00f6tt maradjon, szemben a minden weboldalra vonatkoz\u00f3 izol\u00e1l\u00e1s aktiv\u00e1l\u00e1sa eset\u00e9n tapasztalt 10-13%-kal.<\/p>\n

Az izol\u00e1ci\u00f3s m\u00f3dot aktiv\u00e1lt\u00e1k a Chrome 77 99%-os felhaszn\u00e1l\u00f3ja sz\u00e1m\u00e1ra Android-eszk\u00f6z\u00f6k\u00f6n, legal\u00e1bb 2 GB RAM-mal (1% felhaszn\u00e1l\u00f3n\u00e1l a m\u00f3d le lett tiltva a teljes\u00edtm\u00e9nyfigyel\u00e9s \u00e9rdek\u00e9ben). Az oldalak izol\u00e1ci\u00f3s m\u00f3dj\u00e1t k\u00e9zi aktiv\u00e1l\u00e1sra vagy deaktiv\u00e1l\u00e1sra a «chrome:\/\/flags\/#enable-site-per-process» be\u00e1ll\u00edt\u00e1son kereszt\u00fcl lehet.<\/p>\n

A Chrome desktop edition has now enhanced the aforementioned site isolation mode to counter attacks aimed at completely compromising the content handler process. The improved isolation mode will protect site data from two additional types of threats: data leaks from side-channel attacks like Spectre, and leaks following a full compromise of the handler process due to successful exploitation of vulnerabilities that allow control over the process but are insufficient to bypass sandbox isolation. This protection will be added to Chrome for Android later. <\/p>\n

The essence of the method is that the managing process remembers which site the worker process has access to and blocks access to other sites, even if the attacker gains control over the process and attempts to access resources from another site. The restrictions cover resources related to authentication (saved passwords and cookies), data directly loaded over the network (filtered and tied to the current site's HTML, XML, JSON, PDF, and other file types), internal storage data (localStorage), permissions (granted site access to the microphone, etc.), and messages transmitted via the postMessage API and BroadcastChannel. All such resources are tagged with the originating site and checked by the managing process for the possibility of requests from the worker process.<\/p>\n

Among the events related to Chrome, it is worth noting a kezdet<\/a><\/noindex> the approval of the inclusion of the support function in Chrome Scroll-To-Text<\/a><\/noindex>, lehet\u0151v\u00e9 t\u00e9ve a linkek l\u00e9trehoz\u00e1s\u00e1t k\u00fcl\u00f6nb\u00f6z\u0151 szavakra vagy kifejez\u00e9sekre, kifejezett c\u00edmk\u00e9k megad\u00e1sa n\u00e9lk\u00fcl a «a name» vagy «id» attrib\u00fatumok haszn\u00e1lat\u00e1val. Az ilyen linkek szintaxis\u00e1t webes szabv\u00e1nyk\u00e9nt tervezik elfogadni, amely jelenleg fejleszt\u00e9s alatt \u00e1ll. draft<\/a><\/noindex>. A horgonyr\u00f3l val\u00f3 navig\u00e1ci\u00f3 (gyakorlatilag g\u00f6rget\u00e9ssel v\u00e9gzett keres\u00e9s) a «:~:» jellel van elk\u00fcl\u00f6n\u00edtve. P\u00e9ld\u00e1ul, amikor megnyitja a «https:\/\/opennet.ru\/51702\/#:~:text=Chrom\u0435» linket, az oldal el fog mozdulni az els\u0151 «Chrom\u0435» megeml\u00edt\u00e9s\u00e9nek hely\u00e9re, \u00e9s a sz\u00f3 ki lesz emelve. E lehet\u0151s\u00e9g beker\u00fclt a Canary<\/a><\/noindex>, de az aktiv\u00e1l\u00e1shoz sz\u00fcks\u00e9ges a «--enable-blink-features=TextFragmentIdentifiers» kapcsol\u00f3 haszn\u00e1lata.<\/p>\n

Another interesting upcoming change in Chrome egy<\/a><\/noindex> az inakt\u00edv lapok fagyaszt\u00e1s\u00e1nak lehet\u0151s\u00e9ge, amely automatikusan elt\u00e1vol\u00edtja a h\u00e1tt\u00e9rben l\u00e9v\u0151, t\u00f6bb mint 5 percig inakt\u00edv lapokat a mem\u00f3ri\u00e1b\u00f3l, amelyek nem hajtanak v\u00e9gre jelent\u0151s m\u0171veleteket. A fagyaszt\u00e1sra val\u00f3 alkalmass\u00e1g d\u00f6nt\u00e9se heurisztik\u00e1n alapul. A v\u00e1ltoztat\u00e1s beker\u00fclt a Canary \u00e1gba, amelyb\u0151l az Chrome 79 kiad\u00e1s\u00e1nak alapja fog l\u00e9trej\u00f6nni, \u00e9s a «chrome:\/\/flags\/#proactive-tab-freeze» kapcsol\u00f3n kereszt\u00fcl aktiv\u00e1lhat\u00f3.<\/p>\n

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

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

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