{"id":33706,"date":"2019-10-31T21:54:17","date_gmt":"2019-10-31T18:54:17","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novyj-klass-uyazvimostej-protsessorov-intel-riskuet-pohoronit-hyper-threading-vyshli-zaplatki-vyklyuchateli\/"},"modified":"2019-10-31T21:54:17","modified_gmt":"2019-10-31T18:54:17","slug":"novyj-klass-uyazvimostej-protsessorov-intel-riskuet-pohoronit-hyper-threading-vyshli-zaplatki-vyklyuchateli","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/novyj-klass-uyazvimostej-protsessorov-intel-riskuet-pohoronit-hyper-threading-vyshli-zaplatki-vyklyuchateli","title":{"rendered":"Uma nova classe de vulnerabilidades em processadores Intel amea\u00e7a enterrar o Hyper-Threading: patches desativadores foram lan\u00e7ados","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Ap\u00f3s as vulnerabilidades Meltdown e Spectre descobertas h\u00e1 mais de um ano, parecia que nada mais assustaria os f\u00e3s e usu\u00e1rios dos processadores Intel. No entanto, a empresa conseguiu nos surpreender novamente. Mais precisamente, pesquisadores de vulnerabilidades na microarquitetura dos processadores Intel trouxeram \u00e0 tona um conjunto de novas vulnerabilidades<\/a><\/noindex> Sob o nome geral de microarchitectural data sampling (MDS), h\u00e1 o risco de comprometer a tecnologia de computa\u00e7\u00e3o de m\u00faltiplos threads ou Hyper-Threading (em geral, chamada de simultaneous multithreading, SMT). Descobriu-se que um ataque utilizando uma das variantes do MDS pode interromper a isola\u00e7\u00e3o de um dos threads do Hyper-Threading e facilitar o acesso a dados sens\u00edveis nos buffers e portas dos processadores (em um n\u00edvel abaixo do cache de primeiro n\u00edvel). O que fazer a respeito? A primeira coisa que vem \u00e0 mente \u00e9 desativar o Hyper-Threading, o que os desenvolvedores do ChromeOS j\u00e1 fizeram. O que isso significar\u00e1 para o desempenho dos processadores? Ele diminuir\u00e1. A redu\u00e7\u00e3o pode atingir at\u00e9 40%, ou at\u00e9 mais.<\/p>\n

\"Uma<\/p>\n

At\u00e9 agora, poucos desenvolvedores de sistemas operacionais e aplicativos seguiram o caminho do ChromeOS, mas patches e atualiza\u00e7\u00f5es n\u00e3o demoraram<\/a><\/noindex>. A Apple lan\u00e7ou atualiza\u00e7\u00f5es para seus computadores e laptops vendidos desde 2011. Segundo a empresa, todos os sistemas que rodam macOS Mojave 10.14 j\u00e1 receberam patches<\/a><\/noindex>. Isso ir\u00e1 prevenir ataques atrav\u00e9s do Safari e outros aplicativos. Contudo, a maioria dos usu\u00e1rios n\u00e3o deve sentir uma queda no desempenho. A preven\u00e7\u00e3o completa da amea\u00e7a, no entanto, implica na desativa\u00e7\u00e3o do Hyper-Threading, o que pode levar a uma redu\u00e7\u00e3o de at\u00e9 40% no desempenho. Atualiza\u00e7\u00f5es para os sistemas operacionais Sierra e High Sierra tamb\u00e9m ser\u00e3o lan\u00e7adas. Os dispositivos iPhone, iPad e Watch n\u00e3o s\u00e3o afetados por essas vulnerabilidades.<\/p>\n

A Google est\u00e1 preparando patches para o Android e atualiza\u00e7\u00f5es para o Chrome. \u00c9 importante ressaltar que o Android precisa ser protegido contra vulnerabilidades MDS apenas em plataformas compat\u00edveis com x86 (um agradecimento especial \u00e0 Intel pelos processadores Atom). Os fabricantes de dispositivos devem lan\u00e7ar patches para smartphones e tablets em plataformas Intel, e a Google j\u00e1 est\u00e1 pronta para distribuir o c\u00f3digo corrigido necess\u00e1rio. Os Chromebooks (Chrome OS) j\u00e1 est\u00e3o protegidos<\/a><\/noindex> patches for new vulnerabilities, and in the future, the operating system itself will be corrected. Meanwhile, Google urges users to ensure that device manufacturers have released the necessary patches and\/or provided these patches to Microsoft and Apple as the operating system developers. For cloud platforms and data centers, Google has already distributed<\/a><\/noindex> patches to protect server processors from MDS.<\/p>\n

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

The developer of the Firefox browser, Mozilla, will present patched versions of the application on May 21. These will be Firefox versions 67 and the Extended Support Release version 60.7. The Firefox Beta and Firefox Nightly browsers already include the necessary fixes to protect against the new vulnerability.<\/p>\n

\"Uma<\/p>\n

Microsoft has also released patches for operating systems and cloud platforms. However, the company recommends obtaining the corrected microcode from device manufacturers, although it has also created a webpage<\/a><\/noindex> for downloading the fixes independently. The patch is also included in the automatic update package via the Windows Update service and will be distributed starting Thursday. The Microsoft Azure service is already protected against new vulnerabilities. The Amazon AWS cloud service is also patched<\/a><\/noindex>.<\/p>\n

Finally, patches have been released for operating systems on Linux such as Red Hat<\/a><\/noindex> e Ubuntu<\/a><\/noindex>. More to follow.<\/p>\n

<\/p>\n

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

\t\t\t\t


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

\u041a\u0430\u0437\u0430\u043b\u043e\u0441\u044c \u0431\u044b, \u0447\u0442\u043e \u043f\u043e\u0441\u043b\u0435 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u043d\u044b\u0445 \u0431\u043e\u043b\u044c\u0448\u0435 \u0433\u043e\u0434\u0430 \u043d\u0430\u0437\u0430\u0434 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 Meltdown \u0438 Spectre \u0443\u0436\u0435 \u043d\u0438\u0447\u0442\u043e \u043d\u0435 \u0438\u0441\u043f\u0443\u0433\u0430\u0435\u0442 \u043f\u043e\u043a\u043b\u043e\u043d\u043d\u0438\u043a\u043e\u0432 \u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 Intel. \u0418 \u0432\u0441\u0451 \u0436\u0435 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 \u0441\u043d\u043e\u0432\u0430 \u0443\u0434\u0430\u043b\u043e\u0441\u044c \u043d\u0430\u0441 \u0443\u0434\u0438\u0432\u0438\u0442\u044c. \u0422\u043e\u0447\u043d\u0435\u0435, \u0443\u0434\u0438\u0432\u0438\u043b\u0438 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u043c\u0438\u043a\u0440\u043e\u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u0435 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 Intel. \u041f\u0430\u043a\u0435\u0442 \u043d\u043e\u0432\u044b\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u043f\u043e\u0434 \u043e\u0431\u0449\u0438\u043c \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435\u043c microarchitectural data sampling (MDS) \u0433\u0440\u043e\u0437\u0438\u0442 \u043f\u043e\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u043a\u0440\u0435\u0441\u0442 \u043d\u0430 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 \u043c\u043d\u043e\u0433\u043e\u043f\u043e\u0442\u043e\u0447\u043d\u044b\u0445 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439 \u0438\u043b\u0438 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":25388,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-33706","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\udd47A new class of vulnerabilities in Intel processors risks burying Hyper-Threading: patches-switches have been released | ProHoster","description":"It seems that after the vulnerabilities Meltdown and Spectre were discovered more than a year ago, nothing could scare users and fans of Intel processors anymore. 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\u043f\u043e\u0445\u043e\u0440\u043e\u043d\u0438\u0442\u044c Hyper-Threading: \u0432\u044b\u0448\u043b\u0438 \u0437\u0430\u043f\u043b\u0430\u0442\u043a\u0438-\u0432\u044b\u043a\u043b\u044e\u0447\u0430\u0442\u0435\u043b\u0438 | ProHoster","og:description":"\u041a\u0430\u0437\u0430\u043b\u043e\u0441\u044c \u0431\u044b, \u0447\u0442\u043e \u043f\u043e\u0441\u043b\u0435 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u043d\u044b\u0445 \u0431\u043e\u043b\u044c\u0448\u0435 \u0433\u043e\u0434\u0430 \u043d\u0430\u0437\u0430\u0434 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 Meltdown \u0438 Spectre \u0443\u0436\u0435 \u043d\u0438\u0447\u0442\u043e \u043d\u0435 \u0438\u0441\u043f\u0443\u0433\u0430\u0435\u0442 \u043f\u043e\u043a\u043b\u043e\u043d\u043d\u0438\u043a\u043e\u0432 \u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043e\u0432 Intel. \u0418 \u0432\u0441\u0451 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