{"id":113077,"date":"2024-01-23T17:28:02","date_gmt":"2024-01-23T15:28:02","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/oczenka-effektivnosti-primeneniya-miracleptr-dlya-predotvrashheniya-uyazvimostej-v-chrome"},"modified":"2024-01-23T17:28:02","modified_gmt":"2024-01-23T15:28:02","slug":"oczenka-effektivnosti-primeneniya-miracleptr-dlya-predotvrashheniya-uyazvimostej-v-chrome","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/oczenka-effektivnosti-primeneniya-miracleptr-dlya-predotvrashheniya-uyazvimostej-v-chrome","title":{"rendered":"Valutazione dell'efficacia dell'applicazione di MiraclePtr per prevenire vulnerabilit\u00e0 in Chrome","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Google ha analizzato l'efficacia dell'uso in codice C++ del tipo MiraclePtr (raw_ptr<T>) rispetto ai normali puntatori per proteggere da vulnerabilit\u00e0 causate da accessi a aree di memoria gi\u00e0 liberate (use-after-free). MiraclePtr fornisce un wrapper per i puntatori, eseguendo controlli aggiuntivi e terminando il lavoro in caso di accesso a aree di memoria liberate. Il supporto per MiraclePtr \u00e8 stato abilitato di default sulle piattaforme Windows e Android a maggio 2022 (in Chrome 102), e sulle piattaforme ChromeOS, Linux e macOS a giugno 2023. La protezione basata su MiraclePtr in Chrome si applica a tutti i processi, eccetto il processo di rendering (renderer). <\/p>\n

Dopo aver analizzato la dinamica dei report sulle vulnerabilit\u00e0 e delle chiusure anomale, oltre all'esame di incidenti di sicurezza correlati e ai risultati dei test di fuzzing, si \u00e8 concluso che l'implementazione di MiraclePtr ha fornito protezione contro il 57% delle vulnerabilit\u00e0 di tipo use-after-free, grazie alla conversione all'uso di MiraclePtr nei campi delle classi e nei parametri delle chiamate di callback. Inoltre, si segnala che 5 delle 6 vulnerabilit\u00e0 critiche identificate nell'ultimo anno nella versione stabile di Chrome sono state riconosciute grazie allo studio dei report sulle chiusure anomale legate all'uso di MiraclePtr. <\/p>\n

Il prezzo dell'applicazione di MiraclePtr consiste in un aumento del consumo di memoria, poich\u00e9 per i puntatori \u00e8 necessario memorizzare ulteriori 4 byte con il contatore dei riferimenti. Il consumo di memoria del processo principale del browser con MiraclePtr aumenta del 5,5-8% nelle versioni per sistemi desktop e del 2% in quella per Android. L'aumento medio del consumo per tutti i processi \u00e8 stimato tra l'1% e il 3%. Inoltre, sono state registrate regressioni isolate durante l'utilizzo di MiraclePtr, che portano a una riduzione delle prestazioni, ma non correlate a metriche chiave come il tempo di caricamento e di rendering della pagina. Tra le regressioni identificate si notano un ritardo dell'1,5% nel primo input su Chrome OS, un rallentamento dell'1,5% nell'apertura delle schede sulla piattaforma Android, e un aumento della probabilit\u00e0 di ritardo nell'input a causa della competizione nel thread principale (10% di incremento della probabilit\u00e0 nel 99\u00ba percentile).
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Google \u043f\u0440\u043e\u0430\u043d\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043b\u0430 \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0432 \u043a\u043e\u0434\u0435 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421++ \u0442\u0438\u043f\u0430 MiraclePtr (raw_ptr<T>) \u0432\u043c\u0435\u0441\u0442\u043e \u043e\u0431\u044b\u0447\u043d\u044b\u0445 \u0443\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u0435\u0439 \u0434\u043b\u044f \u0437\u0430\u0449\u0438\u0442\u044b \u043e\u0442 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0432\u044b\u0437\u0432\u0430\u043d\u043d\u044b\u0445 \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0435\u043c \u043a \u0443\u0436\u0435 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0451\u043d\u043d\u044b\u043c \u043e\u0431\u043b\u0430\u0441\u0442\u044f\u043c \u043f\u0430\u043c\u044f\u0442\u0438 (use-after-free). MiraclePtr \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u043e\u0431\u0432\u044f\u0437\u043a\u0443 \u043d\u0430\u0434 \u0443\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044f\u043c\u0438, \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u044e\u0449\u0443\u044e \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0438 \u0430\u0432\u0430\u0440\u0438\u0439\u043d\u043e \u0437\u0430\u0432\u0435\u0440\u0448\u0430\u044e\u0449\u0443\u044e \u0440\u0430\u0431\u043e\u0442\u0443 \u0432 \u0441\u043b\u0443\u0447\u0430\u0435 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u044f \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u044f \u043a \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0451\u043d\u043d\u044b\u043c \u043e\u0431\u043b\u0430\u0441\u0442\u044f\u043c \u043f\u0430\u043c\u044f\u0442\u0438. \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 MiraclePtr \u0431\u044b\u043b\u0430 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0430 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u043d\u0430 […]<\/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-113077","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\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\n","aioseo_head_json":{"title":"\ud83e\udd47Valutazione dell'efficacia dell'applicazione di MiraclePtr per prevenire vulnerabilit\u00e0 in Chrome | ProHoster","description":"Google ha analizzato l'efficacia dell'uso nel codice in C++ del tipo MiraclePtr (raw_ptr) invece dei normali puntatori per proteggere da vulnerabilit\u00e0 causate da accessi a zone di memoria gi\u00e0 liberate (use-after-free). MiraclePtr fornisce un'astrazione sui puntatori che esegue controlli aggiuntivi e termina l'esecuzione in caso venga rilevato un accesso a zone di memoria liberate. Il supporto per MiraclePtr \u00e8 stato abilitato per impostazione predefinita su","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/oczenka-effektivnosti-primeneniya-miracleptr-dlya-predotvrashheniya-uyazvimostej-v-chrome","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041e\u0446\u0435\u043d\u043a\u0430 \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u0438 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f MiraclePtr \u0434\u043b\u044f \u043f\u0440\u0435\u0434\u043e\u0442\u0432\u0440\u0430\u0449\u0435\u043d\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 Chrome | ProHoster","og:description":"\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Google \u043f\u0440\u043e\u0430\u043d\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043b\u0430 \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0432 \u043a\u043e\u0434\u0435 \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421++ \u0442\u0438\u043f\u0430 MiraclePtr (raw_ptr) \u0432\u043c\u0435\u0441\u0442\u043e \u043e\u0431\u044b\u0447\u043d\u044b\u0445 \u0443\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u0435\u0439 \u0434\u043b\u044f \u0437\u0430\u0449\u0438\u0442\u044b \u043e\u0442 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0432\u044b\u0437\u0432\u0430\u043d\u043d\u044b\u0445 \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0435\u043c \u043a \u0443\u0436\u0435 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0451\u043d\u043d\u044b\u043c \u043e\u0431\u043b\u0430\u0441\u0442\u044f\u043c \u043f\u0430\u043c\u044f\u0442\u0438 (use-after-free). MiraclePtr \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u043e\u0431\u0432\u044f\u0437\u043a\u0443 \u043d\u0430\u0434 \u0443\u043a\u0430\u0437\u0430\u0442\u0435\u043b\u044f\u043c\u0438, \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u044e\u0449\u0443\u044e \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0438 \u0430\u0432\u0430\u0440\u0438\u0439\u043d\u043e \u0437\u0430\u0432\u0435\u0440\u0448\u0430\u044e\u0449\u0443\u044e \u0440\u0430\u0431\u043e\u0442\u0443 \u0432 \u0441\u043b\u0443\u0447\u0430\u0435 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u0438\u044f \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u044f \u043a \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0451\u043d\u043d\u044b\u043c \u043e\u0431\u043b\u0430\u0441\u0442\u044f\u043c \u043f\u0430\u043c\u044f\u0442\u0438. \u041f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 MiraclePtr \u0431\u044b\u043b\u0430 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0430 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u043d\u0430","og:url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/oczenka-effektivnosti-primeneniya-miracleptr-dlya-predotvrashheniya-uyazvimostej-v-chrome","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2024-01-23T15:28:02+00:00","article:modified_time":"2024-01-23T15:28:02+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts\/113077","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/comments?post=113077"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts\/113077\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/media?parent=113077"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/categories?post=113077"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/tags?post=113077"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}