{"id":84985,"date":"2020-06-12T13:42:15","date_gmt":"2020-06-12T11:42:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/arm-prohudilas-obnaruzhilas-isklyuchitelnaya-uyazvimost-dlya-ataki-na-spekulyativnye-vychisleniya"},"modified":"2020-06-12T13:42:15","modified_gmt":"2020-06-12T11:42:15","slug":"arm-prohudilas-obnaruzhilas-isklyuchitelnaya-uyazvimost-dlya-ataki-na-spekulyativnye-vychisleniya","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/news\/arm-prohudilas-obnaruzhilas-isklyuchitelnaya-uyazvimost-dlya-ataki-na-spekulyativnye-vychisleniya","title":{"rendered":"ARM l\u00e4ckte: en exceptionell s\u00e5rbarhet f\u00f6r attacker p\u00e5 spekulativa ber\u00e4kningar har uppt\u00e4ckts","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

F\u00f6r processorer p\u00e5 ett brett spektrum av Armv8-A-arkitekturer (Cortex-A) uppt\u00e4cktes<\/a><\/noindex> en unik s\u00e5rbarhet f\u00f6r sidokanalsattacker med anv\u00e4ndning av spekulativa ber\u00e4kningsalgoritmer. Detta meddelades av ARM och patchar och riktlinjer f\u00f6r att mildra den uppt\u00e4ckta s\u00e5rbarheten tillhandah\u00f6lls. Riskerna \u00e4r inte extremt stora, men man f\u00e5r inte bortse fr\u00e5n dem eftersom ARM-arkitekturer finns \u00f6verallt, vilket g\u00f6r risken f\u00f6r l\u00e4ckage ofattbar enligt konsekvenserna.<\/p>\n

\"ARM<\/p>\n

Den s\u00e5rbarhet som uppt\u00e4cktes av specialister p\u00e5 Google fick kodnamnet Straight-Line Speculation (SLS) och det officiella beteckningen CVE-2020-13844. Enligt ARM \u00e4r SLS en av formerna av Spectre-s\u00e5rbarheten, som (tillsammans med Meltdown-s\u00e5rbarheten) blev allm\u00e4nt k\u00e4nd i januari 2018. Med andra ord \u00e4r det en klassisk s\u00e5rbarhet i spekulativa ber\u00e4kningsmekanismer med sidokanalsattacker.<\/p>\n

Spekulativa ber\u00e4kningar kr\u00e4ver att data behandlas i f\u00f6rv\u00e4g l\u00e4ngs flera m\u00f6jliga grenar, \u00e4ven om de senare kan kasseras som on\u00f6diga. Sidokanalsattacker g\u00f6r det m\u00f6jligt att stj\u00e4la s\u00e5dana mellanliggande data innan de helt f\u00f6rst\u00f6rs. Resultatet blir kraftfulla processorer och risk f\u00f6r datal\u00e4ckage.<\/p>\n

Straight-Line Speculation-angreppet p\u00e5 processorer med ARM-arkitektur f\u00e5r processorn att varje g\u00e5ng efter en f\u00f6r\u00e4ndring i kommandostr\u00f6mmen g\u00e5 \u00f6ver till att utf\u00f6ra instruktioner som hittas direkt i minnet, ist\u00e4llet f\u00f6r att f\u00f6lja instruktionerna i den nya kommandostr\u00f6mmen. Uppenbarligen \u00e4r det inte det b\u00e4sta valet av instruktioner f\u00f6r att utf\u00f6ra, vilket en angripare kan utnyttja.<\/p>\n

<\/center><\/p>\n

Till ARM:s \u00e4ra har de inte bara sl\u00e4ppt en handbok f\u00f6r utvecklare som hj\u00e4lper till att undvika risken f\u00f6r l\u00e4ckage genom en attack p\u00e5 Straight-Line Speculation, utan ocks\u00e5 tillhandah\u00e5llit patchar f\u00f6r de st\u00f6rsta operativsystemen, som FreeBSD, OpenBSD, Trusted Firmware-A och OP-TEE samt sl\u00e4ppt patchar f\u00f6r kompilatorerna GCC och LLVM.<\/p>\n

F\u00f6retaget uppgav ocks\u00e5 att patcharna inte skulle p\u00e5verka prestandan p\u00e5 ARM-plattformar, som det h\u00e4nde p\u00e5 x86-kompatibla Intel-plattformar med blockering av Spectre- och Meltdown-s\u00e5rbarheterna. Men detta kommer vi att f\u00e5 veta fr\u00e5n externa k\u00e4llor som ger en objektiv bild av den nya s\u00e5rbarheten.<\/p>\n

<\/p>\n

<\/center><\/p>\n

\t\t\t\t


\n\t\t\t\t\t\t\t\t<\/center>
K\u00e4lla: 3dnews.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0414\u043b\u044f \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 \u043d\u0430 \u0448\u0438\u0440\u043e\u043a\u043e\u043c \u0441\u043f\u0435\u043a\u0442\u0440\u0435 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440 Armv8-A (Cortex-A) \u043d\u0430\u0448\u043b\u0430\u0441\u044c \u0441\u0432\u043e\u044f \u0443\u043d\u0438\u043a\u0430\u043b\u044c\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0434\u043b\u044f \u0430\u0442\u0430\u043a\u0438 \u043f\u043e \u043f\u043e\u0431\u043e\u0447\u043d\u044b\u043c \u043a\u0430\u043d\u0430\u043b\u0430\u043c \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u0441\u043f\u0435\u043a\u0443\u043b\u044f\u0442\u0438\u0432\u043d\u044b\u0445 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u043e\u0432 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439. \u041e\u0431 \u044d\u0442\u043e\u043c \u0441\u043e\u043e\u0431\u0449\u0438\u043b\u0430 \u0441\u0430\u043c\u0430 ARM \u0438 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u0438\u043b\u0430 \u043f\u0430\u0442\u0447\u0438 \u0438 \u0440\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u0430 \u0434\u043b\u044f \u0441\u043c\u044f\u0433\u0447\u0435\u043d\u0438\u044f \u043d\u0430\u0439\u0434\u0435\u043d\u043d\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438. \u041e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u044c \u043d\u0435 \u0442\u0430\u043a \u0432\u0435\u043b\u0438\u043a\u0430, \u043d\u043e \u043f\u0440\u0435\u043d\u0435\u0431\u0440\u0435\u0433\u0430\u0442\u044c \u0435\u044e \u043d\u0435\u043b\u044c\u0437\u044f, \u0432\u0435\u0434\u044c \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u044b \u043d\u0430 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u0435 ARM \u0435\u0441\u0442\u044c \u0432\u0435\u0437\u0434\u0435, \u0447\u0442\u043e \u0434\u0435\u043b\u0430\u0435\u0442 \u0440\u0438\u0441\u043a \u0443\u0442\u0435\u0447\u0435\u043a […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":84986,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-84985","post","type-post","status-publish","format-standard","has-post-thumbnail","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\udd47ARM har l\u00e4ckt: en exceptionell s\u00e5rbarhet har uppt\u00e4ckts f\u00f6r attacker mot spekulativ ber\u00e4kning | ProHoster","description":"F\u00f6r processorer p\u00e5 ett brett spektrum av Armv8-A-arkitekturer (Cortex-A)","canonical_url":"https:\/\/prohoster.info\/sv\/blog\/news\/arm-prohudilas-obnaruzhilas-isklyuchitelnaya-uyazvimost-dlya-ataki-na-spekulyativnye-vychisleniya","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sv_SE","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\udd47ARM \u043f\u0440\u043e\u0445\u0443\u0434\u0438\u043b\u0430\u0441\u044c: \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0438\u043b\u0430\u0441\u044c \u0438\u0441\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0434\u043b\u044f \u0430\u0442\u0430\u043a\u0438 \u043d\u0430 \u0441\u043f\u0435\u043a\u0443\u043b\u044f\u0442\u0438\u0432\u043d\u044b\u0435 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u044f | ProHoster","og:description":"\u0414\u043b\u044f \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 \u043d\u0430 \u0448\u0438\u0440\u043e\u043a\u043e\u043c \u0441\u043f\u0435\u043a\u0442\u0440\u0435 \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440 Armv8-A (Cortex-A)","og:url":"https:\/\/prohoster.info\/sv\/blog\/news\/arm-prohudilas-obnaruzhilas-isklyuchitelnaya-uyazvimost-dlya-ataki-na-spekulyativnye-vychisleniya","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":"2020-06-12T11:42:15+00:00","article:modified_time":"2020-06-12T11:42:15+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"84985","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-02-28 14:46:42","updated":"2022-10-01 13:37:31","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/posts\/84985","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/comments?post=84985"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/posts\/84985\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/media\/84986"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/media?parent=84985"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/categories?post=84985"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/sv\/wp-json\/wp\/v2\/tags?post=84985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}