{"id":71652,"date":"2020-02-27T08:51:34","date_gmt":"2020-02-27T05:51:34","guid":{"rendered":"https:\/\/prohoster.info\/blog\/0-day-uyazvimost-v-chrome-vyyavlennaya-cherez-analiz-izmenenij-v-dvizhke-v8"},"modified":"2020-03-03T16:10:40","modified_gmt":"2020-03-03T13:10:40","slug":"0-day-uyazvimost-v-chrome-vyyavlennaya-cherez-analiz-izmenenij-v-dvizhke-v8","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sl\/blog\/news\/0-day-uyazvimost-v-chrome-vyyavlennaya-cherez-analiz-izmenenij-v-dvizhke-v8","title":{"rendered":"0-day ranljivost v Chromu, odkrita z analizo sprememb v motorju V8","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Raziskovalci podjetja Exodus Intelligence so pokazali<\/a><\/noindex> \u0161ibko to\u010dko v procesu odpravljanja ranljivosti v kodi Chrome\/Chromium. Te\u017eava je v tem, da Google razkriva informacije, da so opravljene odprave povezane z varnostnimi te\u017eavami \u0161ele po objavi, medtem ko
\nv repozitorij dodaja kodo za odpravo ranljivosti v engines V8 pred objavo. Nekaj \u010dasa odprave potekajo testiranja, kar povzro\u010da okno, v katerem postane ranljivost odpravljena v osnovni kodi in dostopna za analizo, vendar ostaja ranljivost neodpravljena na sistemih uporabnikov. <\/p>\n

Ob pregledu sprememb v repozitoriju so raziskovalci opazili dodano 19. februarja \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435<\/a><\/noindex> in v treh dneh uspeli pripraviti eksploit<\/a><\/noindex>, ki zadene aktualne izdaje Chrome (objavljen eksploit ni vseboval komponent za obhod sandbox izolacije). Podjetje Google je hitro je izdalo<\/a><\/noindex> posodobilo Chrome 80.0.3987.122, odpravljajo\u010d te\u017eavo, povezano s predlaganim eksploitom ranljivost<\/a><\/noindex> (CVE-2020-6418). Ranljivost so prvotno odkrili in\u017eenirji Google in je bila povzro\u010dena s te\u017eavo pri obdelavi tipov v operaciji JSCreate, ki se lahko izkori\u0161\u010da preko metode Array.pop ali Array.prototype.pop. Zanimivo je, da je bila podobna te\u017eava fixed<\/a><\/noindex> v Firefoxu poleti lani.<\/p>\n

Raziskovalci so prav tako opozorili na poenostavitev ustvarjanja eksploitov zaradi vklju\u010ditve v Chromu 80<\/a><\/noindex> mehanizem pakiranja kazalnikov<\/a><\/noindex> (\u0432\u043c\u0435\u0441\u0442\u043e \u043f\u043e\u043b\u043d\u043e\u0433\u043e 64-\u0440\u0430\u0437\u0440\u044f\u0434\u043d\u043e\u0433\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u0445\u0440\u0430\u043d\u044f\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0443\u043d\u0438\u043a\u0430\u043b\u044c\u043d\u044b\u0435 \u043d\u0438\u0436\u043d\u0438\u0435 \u0431\u0438\u0442\u044b \u0443\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044f, \u0447\u0442\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0441\u043e\u043a\u0440\u0430\u0442\u0438\u0442\u044c \u043f\u043e\u0442\u0440\u0435\u0431\u043b\u0435\u043d\u0438\u0435 \u043f\u0430\u043c\u044f\u0442\u0438 \u0432 \u043a\u0443\u0447\u0435). \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043d\u0430\u0445\u043e\u0434\u044f\u0449\u0438\u0435\u0441\u044f \u0432 \u043d\u0430\u0447\u0430\u043b\u0435 \u043a\u0443\u0447\u0438 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u044b \u0434\u0430\u043d\u043d\u044b\u0445, \u0442\u0430\u043a\u0438\u0435 \u043a\u0430\u043a \u0442\u0430\u0431\u043b\u0438\u0446\u0430 \u0432\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u044b\u0445 \u0444\u0443\u043d\u043a\u0446\u0438\u0439, \u043e\u0431\u044a\u0435\u043a\u0442\u044b «native context» \u0438 koreninski objekti<\/a><\/noindex> zbiralnika odpadkov, so zdaj name\u0161\u010deni na predvidljivih in zapisljivih pakiranih naslovih.<\/p>\n

Zanimivo je, da je skoraj pred letom dni podjetje Exodus Intelligence izvedlo<\/a><\/noindex> podobno predstavitev mo\u017enosti ustvarjanja eksploitov na podlagi prou\u010devanja javnega dnevnika odpravitev v V8, a o\u010ditno do ustreznih zaklju\u010dkov ni pri\u0161lo. Na mestu raziskovalcev
\nExodus Intelligence bi se lahko zna\u0161li zlonamerni akterji ali obve\u0161\u010devalne slu\u017ebe, ki bi pri ustvarjanju eksploitov imeli mo\u017enost prikrito izkori\u0161\u010dati ranljivost dneve ali celo tedne, preden bi bila oblikovana nova razli\u010dica Chrome. <\/p>\n

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

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

\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Exodus Intelligence \u043f\u0440\u043e\u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0438\u0440\u043e\u0432\u0430\u043b\u0438 \u0441\u043b\u0430\u0431\u043e\u0435 \u043c\u0435\u0441\u0442\u043e \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u043a\u043e\u0434\u043e\u0432\u043e\u0439 \u0431\u0430\u0437\u0435 Chrome\/Chromium. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0441\u0432\u044f\u0437\u0430\u043d\u0430 \u0441 \u0442\u0435\u043c, \u0447\u0442\u043e Google \u0440\u0430\u0441\u043a\u0440\u044b\u0432\u0430\u0435\u0442 \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f, \u0447\u0442\u043e \u0432\u043d\u0435\u0441\u0451\u043d\u043d\u044b\u0435 \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0438\u043c\u0435\u044e\u0442 \u043e\u0442\u043d\u043e\u0448\u0435\u043d\u0438\u0435 \u043a \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430\u043c \u0441 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u044c\u044e \u0442\u043e\u043b\u044c\u043a\u043e \u043f\u043e\u0441\u043b\u0435 \u0440\u0435\u043b\u0438\u0437\u0430, \u043d\u043e \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u0442 \u0432 \u0440\u0435\u043f\u043e\u0437\u0438\u0442\u043e\u0440\u0438\u0439 \u043a\u043e\u0434 \u0434\u043b\u044f \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u0434\u0432\u0438\u0436\u043a\u0435 V8 \u0434\u043e \u043f\u0443\u0431\u043b\u0438\u043a\u0430\u0446\u0438\u0438 \u0440\u0435\u043b\u0438\u0437\u0430. \u041a\u0430\u043a\u043e\u0435-\u0442\u043e \u0432\u0440\u0435\u043c\u044f \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0445\u043e\u0434\u044f\u0442 \u0442\u0435\u0441\u0442\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-71652","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\udd470-day ranljivost v Chrome, odkrita z analizo sprememb v motorju V8 | ProHoster","description":"Raziskovalci podjetja Exodus Intelligence so pokazali ranljivost v procesu 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