{"id":101387,"date":"2021-09-23T22:22:45","date_gmt":"2021-09-23T20:22:45","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/kritika-vklyucheniya-api-idle-detection-v-chrome-94-eksperimenty-s-rust-v-chrome"},"modified":"2021-09-23T22:22:45","modified_gmt":"2021-09-23T20:22:45","slug":"kritika-vklyucheniya-api-idle-detection-v-chrome-94-eksperimenty-s-rust-v-chrome","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/kritika-vklyucheniya-api-idle-detection-v-chrome-94-eksperimenty-s-rust-v-chrome","title":{"rendered":"Kritika zaveden\u00ed API Idle Detection v Chromu 94. Experimenty s Rustem v Chromu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Zaveden\u00ed API Idle Detection ve v\u00fdchoz\u00edm nastaven\u00ed v Chromu 94 vyvolalo vlnu kritiky s odkazy na n\u00e1mitky od v\u00fdvoj\u00e1\u0159\u016f Firefoxu a WebKit\/Safari. <\/p>\n

API Idle Detection umo\u017e\u0148uje web\u016fm zjistit, kdy u\u017eivatel ne\u010din\u00ed \u017e\u00e1dnou aktivitu, tj. kdy\u017e neinteraguje s kl\u00e1vesnic\u00ed\/my\u0161\u00ed nebo vykon\u00e1v\u00e1 pr\u00e1ci na jin\u00e9m monitoru. API tak\u00e9 umo\u017e\u0148uje zjistit, zda je v syst\u00e9mu spu\u0161t\u011bna obrazovka s ochranou. O neaktivit\u011b je informov\u00e1no prost\u0159ednictv\u00edm zasl\u00e1n\u00ed upozorn\u011bn\u00ed po dosa\u017een\u00ed stanoven\u00e9ho prahu neaktivity, jeho\u017e minim\u00e1ln\u00ed hodnota je nastavena na 1 minutu. <\/p>\n

Je d\u016fle\u017eit\u00e9 poznamenat, \u017ee pou\u017eit\u00ed API Idle Detection vy\u017eaduje v\u00fdslovn\u00e9 ud\u011blen\u00ed opr\u00e1vn\u011bn\u00ed u\u017eivatele, tj. pokud se aplikace pokus\u00ed poprv\u00e9 zjistit ne\u010dinnost, u\u017eivateli se zobraz\u00ed okno s nab\u00eddkou poskytnout opr\u00e1vn\u011bn\u00ed nebo blokovat operaci. Pro \u00fapln\u00e9 vypnut\u00ed API Idle Detection je v sekci nastaven\u00ed \u201eSoukrom\u00ed a zabezpe\u010den\u00ed\u201c k dispozici speci\u00e1ln\u00ed mo\u017enost (\u201achrome:\/\/settings\/content\/idleDetection\u2018). <\/p>\n

Mezi oblasti pou\u017eit\u00ed pat\u0159\u00ed aplikace pro chat, soci\u00e1ln\u00ed s\u00edt\u011b a komunikaci, kter\u00e9 mohou m\u011bnit stav u\u017eivatele v z\u00e1vislosti na jeho p\u0159\u00edtomnosti u po\u010d\u00edta\u010de, nebo odkl\u00e1dat zobrazen\u00ed upozorn\u011bn\u00ed na nov\u00e9 zpr\u00e1vy do doby, ne\u017e se u\u017eivatel vr\u00e1t\u00ed. API m\u016f\u017ee b\u00fdt tak\u00e9 pou\u017eito v kioskov\u00fdch aplikac\u00edch k n\u00e1vratu na v\u00fdchoz\u00ed obrazovku po stanoven\u00e9m \u010dase neaktivity nebo k deaktivaci energeticky n\u00e1ro\u010dn\u00fdch interaktivn\u00edch operac\u00ed, jako je p\u0159ekreslov\u00e1n\u00ed slo\u017eit\u00fdch neust\u00e1le aktualizovan\u00fdch graf\u016f, kdy\u017e u po\u010d\u00edta\u010de nen\u00ed u\u017eivatel. <\/p>\n

Postoj protivn\u00edk\u016f zapnut\u00ed API Idle Detection spo\u010d\u00edv\u00e1 v tom, \u017ee informace o tom, zda je u\u017eivatel za po\u010d\u00edta\u010dem nebo ne, mohou b\u00fdt pova\u017eov\u00e1ny za d\u016fv\u011brn\u00e9. Krom\u011b u\u017eite\u010dn\u00fdch aplikac\u00ed m\u016f\u017ee b\u00fdt toto API tak\u00e9 zneu\u017e\u00edv\u00e1no k neblah\u00fdm \u00fa\u010del\u016fm, nap\u0159\u00edklad k pokus\u016fm o exploataci zranitelnost\u00ed v dob\u011b, kdy u\u017eivatel nen\u00ed p\u0159\u00edtomen, nebo k zakryt\u00ed n\u00e1padn\u00e9 \u0161kodliv\u00e9 aktivity, jako je t\u011b\u017eba kryptom\u011bn. Pomoc\u00ed tohoto API mohou b\u00fdt rovn\u011b\u017e shroma\u017e\u010fov\u00e1ny informace o vzorc\u00edch chov\u00e1n\u00ed u\u017eivatele a denn\u00edm rytmu jeho pr\u00e1ce. Nap\u0159\u00edklad lze zjistit, kdy obvykle u\u017eivatel odch\u00e1z\u00ed na ob\u011bd nebo opou\u0161t\u00ed pracovn\u00ed m\u00edsto. V podm\u00ednk\u00e1ch povinn\u00e9ho po\u017eadavku na potvrzen\u00ed ud\u011blen\u00ed opr\u00e1vn\u011bn\u00ed jsou uveden\u00e9 obavy pova\u017eov\u00e1ny Googlem za bezv\u00fdznamn\u00e9. <\/p>\n

D\u00e1le lze zm\u00ednit pozn\u00e1mku v\u00fdvoj\u00e1\u0159\u016f Chrome o zav\u00e1d\u011bn\u00ed nov\u00fdch technik zaji\u0161t\u011bn\u00ed bezpe\u010dn\u00e9 pr\u00e1ce s pam\u011bt\u00ed. Podle \u00fadaj\u016f Google zp\u016fsobuje 70 % bezpe\u010dnostn\u00edch probl\u00e9m\u016f v Chrome chyby p\u0159i pr\u00e1ci s pam\u011bt\u00ed, jako je p\u0159\u00edstup k poli po uvoln\u011bn\u00ed souvisej\u00edc\u00ed pam\u011bti (use-after-free). Byly definov\u00e1ny t\u0159i hlavn\u00ed strategie boje proti t\u011bmto chyb\u00e1m: pos\u00edlen\u00ed kontrol b\u011bhem kompilace, blokov\u00e1n\u00ed chyb b\u011bhem b\u011bhu a pou\u017eit\u00ed jazyka, kter\u00fd zaji\u0161\u0165uje bezpe\u010dn\u00e9 zach\u00e1zen\u00ed s pam\u011bt\u00ed. <\/p>\n

Existuj\u00ed zpr\u00e1vy o za\u010d\u00e1tku experiment\u016f na p\u0159id\u00e1n\u00ed mo\u017enosti v\u00fdvoje komponent\u016f v jazyce Rust do k\u00f3du Chromium. K\u00f3d v Rustu zat\u00edm nen\u00ed sou\u010d\u00e1st\u00ed dod\u00e1van\u00fdch u\u017eivatelsk\u00fdch sestaven\u00ed a je p\u0159edev\u0161\u00edm c\u00edlen na testov\u00e1n\u00ed mo\u017enosti v\u00fdvoje jednotliv\u00fdch \u010d\u00e1st\u00ed prohl\u00ed\u017ee\u010de v Rustu a jejich integraci s ostatn\u00edmi \u010d\u00e1stmi napsan\u00fdmi v C++. Sou\u010dasn\u011b pokra\u010duje projekt pro k\u00f3d v C++ zam\u011b\u0159en\u00fd na pou\u017eit\u00ed typu MiraclePtr nam\u00edsto raw ukazatel\u016f, aby se zablokovala mo\u017enost exploatace zranitelnost\u00ed zp\u016fsoben\u00fdch p\u0159\u00edstupem k ji\u017e uvoln\u011bn\u00fdm blok\u016fm pam\u011bti, a navrhuje se nov\u00fd zp\u016fsob odhalov\u00e1n\u00ed chyb b\u011bhem kompilace. <\/p>\n

Krom\u011b toho spole\u010dnost Google zahajuje experiment na testov\u00e1n\u00ed mo\u017en\u00e9ho naru\u0161en\u00ed funkce webov\u00fdch str\u00e1nek po dosa\u017een\u00ed verze prohl\u00ed\u017ee\u010de, kter\u00e1 se skl\u00e1d\u00e1 ze t\u0159\u00ed \u010d\u00edslic nam\u00edsto dvou. V testovac\u00edch vyd\u00e1n\u00edch Chrome 96 byla p\u0159id\u00e1na mo\u017enost \u201achrome:\/\/flags#force-major-version-to-100\u2018, d\u00edky kter\u00e9 je ve hlavi\u010dce User-Agent vyd\u00e1v\u00e1na verze 100 (Chrome\/100.0.4650.4). V srpnu byl proveden podobn\u00fd experiment v prohl\u00ed\u017ee\u010di Firefox, kter\u00fd odhalil probl\u00e9my s zpracov\u00e1n\u00edm t\u0159\u00edcifern\u00fdch verz\u00ed na n\u011bkter\u00fdch webov\u00fdch str\u00e1nk\u00e1ch.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0435 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e API Idle Detection \u0432 Chrome 94 \u043f\u0440\u0438\u0432\u0435\u043b\u043e \u043a \u0432\u043e\u043b\u043d\u0435 \u043a\u0440\u0438\u0442\u0438\u043a\u0438 \u0441\u043e \u0441\u0441\u044b\u043b\u043a\u0430\u043c\u0438 \u043d\u0430 \u0432\u043e\u0437\u0440\u0430\u0436\u0435\u043d\u0438\u044f \u043e\u0442 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 Firefox \u0438 WebKit\/Safari. 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API \u0442\u0430\u043a\u0436\u0435 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0443\u0437\u043d\u0430\u0442\u044c \u0437\u0430\u043f\u0443\u0449\u0435\u043d \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0445\u0440\u0430\u043d\u0438\u0442\u0435\u043b\u044c \u044d\u043a\u0440\u0430\u043d\u0430 \u0438\u043b\u0438 \u043d\u0435\u0442. \u0418\u043d\u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-101387","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47 Kritika zahrnut\u00ed API Idle Detection v Chrome 94. 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