{"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\/es\/blog\/news\/oczenka-effektivnosti-primeneniya-miracleptr-dlya-predotvrashheniya-uyazvimostej-v-chrome","title":{"rendered":"Evaluaci\u00f3n de la efectividad de MiraclePtr para prevenir vulnerabilidades en Chrome","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>La empresa Google analiz\u00f3 la efectividad del uso en el c\u00f3digo en C++ del tipo MiraclePtr (raw_ptr&lt;T&gt;) en lugar de punteros normales para protegerse contra vulnerabilidades causadas por el acceso a \u00e1reas de memoria ya liberadas (use-after-free). MiraclePtr proporciona un envoltorio sobre los punteros, realizando verificaciones adicionales y finalizando el trabajo en caso de detectar un acceso a \u00e1reas de memoria liberadas. El soporte para MiraclePtr se incluy\u00f3 por defecto en las plataformas Windows y Android en mayo de 2022 (en Chrome 102), y en las plataformas ChromeOS, Linux y macOS en junio de 2023. La protecci\u00f3n basada en MiraclePtr en Chrome se aplica a todos los procesos, excepto al proceso responsable de la renderizaci\u00f3n (renderer).      <\/p>\n<p>Tras estudiar la din\u00e1mica de los informes de vulnerabilidades y fallos, as\u00ed como analizar incidentes de seguridad relacionados y resultados de pruebas de fuzzing, se concluy\u00f3 que la implementaci\u00f3n de MiraclePtr proporcion\u00f3 protecci\u00f3n contra el 57% de las vulnerabilidades del tipo use-after-free, gracias a la migraci\u00f3n al uso de MiraclePtr de campos de clases y par\u00e1metros de llamadas de retorno. Adem\u00e1s, se menciona que 5 de las 6 vulnerabilidades cr\u00edticas identificadas en el \u00faltimo a\u00f1o en la rama estable de Chrome fueron identificadas gracias al an\u00e1lisis de informes de fallos relacionados con el uso de MiraclePtr.      <\/p>\n<p>El costo de utilizar MiraclePtr es un aumento en el consumo de memoria, ya que se requiere almacenar 4 bytes adicionales para el contador de referencias en los punteros. El consumo de memoria del proceso principal del navegador al emplear MiraclePtr aumenta entre un 5.5% y un 8% en las compilaciones para sistemas de escritorio y en un 2% en la versi\u00f3n para Android. El aumento promedio en el consumo para todos los procesos se estima entre un 1% y un 3%. Adem\u00e1s, al usar MiraclePtr se han registrado regresiones individuales que causan una disminuci\u00f3n en el rendimiento, pero no est\u00e1n relacionadas con m\u00e9tricas clave como el tiempo de carga y renderizado de la p\u00e1gina. Entre las regresiones identificadas se observa un retraso del 1.5% en la primera entrada en Chrome OS, una desaceleraci\u00f3n del 1.5% en la apertura de pesta\u00f1as en la plataforma Android, as\u00ed como un aumento en la probabilidad de retraso en la entrada debido a la competencia en el hilo principal (un aumento en la probabilidad del 10% en el percentil 99).<br \/>\n<br \/>Fuente: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60482\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\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&lt;T&gt;) \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 [&hellip;]<\/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-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" content=\"\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 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