{"id":30564,"date":"2019-10-31T21:36:12","date_gmt":"2019-10-31T18:36:12","guid":{"rendered":"https:\/\/prohoster.info\/blog\/positive-technologies-soobshhila-o-nahodke-novoj-potentsialnoj-zakladki-v-chipah-intel\/"},"modified":"2019-10-31T21:36:12","modified_gmt":"2019-10-31T18:36:12","slug":"positive-technologies-soobshhila-o-nahodke-novoj-potentsialnoj-zakladki-v-chipah-intel","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/positive-technologies-soobshhila-o-nahodke-novoj-potentsialnoj-zakladki-v-chipah-intel","title":{"rendered":"A Positive Technologies anunciou a descoberta de um novo potencial \"espi\u00e3o\" nos chips Intel.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\u00c9 dif\u00edcil discutir que os processadores s\u00e3o solu\u00e7\u00f5es bastante complexas que simplesmente n\u00e3o podem funcionar sem autodiagn\u00f3stico e sofisticados meios de controle, tanto na fase de fabrica\u00e7\u00e3o quanto durante a opera\u00e7\u00e3o. Os desenvolvedores precisam ter ferramentas de \"autoridade suprema\" para ter total confian\u00e7a na viabilidade do produto. E essas ferramentas n\u00e3o desaparecem. No futuro, todos esses meios de diagn\u00f3stico dentro do processador podem servir a bons prop\u00f3sitos, como tecnologias de controle remoto do tipo Intel AMT, mas tamb\u00e9m podem potencialmente se transformar em portas dos fundos para ag\u00eancias de seguran\u00e7a ou criminosos, que muitas vezes representam a mesma coisa para o usu\u00e1rio.<\/p>\n

\"A<\/p>\n

Como voc\u00eas podem lembrar, em maio de 2016, especialistas da Positive Technologies descobriram que o m\u00f3dulo Intel Management Engine 11, respons\u00e1vel pela implementa\u00e7\u00e3o da tecnologia AMT no chipset (PCH), passou por mudan\u00e7as significativas e se tornou vulner\u00e1vel a ataques de criminosos. At\u00e9 a vers\u00e3o IME 11, o m\u00f3dulo tinha uma arquitetura \u00fanica e, sem documenta\u00e7\u00e3o especial, n\u00e3o representava um grande risco, mas poderia abrir o acesso a informa\u00e7\u00f5es na mem\u00f3ria do PC. A partir da vers\u00e3o IME 11, o m\u00f3dulo tornou-se compat\u00edvel com x86 e acess\u00edvel para estudo por um p\u00fablico mais amplo (mais informa\u00e7\u00f5es sobre a vulnerabilidade INTEL-SA-00086 aqui e adiante nos links). Al\u00e9m disso, um ano depois, foi identificada uma liga\u00e7\u00e3o entre o IME e o programa de vigil\u00e2ncia da NSA dos EUA. O exame adicional do IME revelou outra potencial \"inser\u00e7\u00e3o\" nos controladores e processadores Intel, que foi discutida ontem na confer\u00eancia Black Hat em Cingapura por especialistas da Positive Technologies, Maksim Goryachy e Mark Ermolov.<\/p>\n

Dentro do hub PCH e nos processadores Intel, foi encontrado um analisador l\u00f3gico multifuncional de sinais chamado VISA (Intel Visualization of Internal Signals Architecture). Mais precisamente, o VISA tamb\u00e9m \u00e9 uma ferramenta da Intel para testar a funcionalidade dos processadores. A documenta\u00e7\u00e3o sobre este bloco n\u00e3o est\u00e1 dispon\u00edvel publicamente, mas isso n\u00e3o significa que ela n\u00e3o existe. O estudo do VISA revelou que o analisador, inicialmente desativado na f\u00e1brica da Intel, pode ser ativado por um invasor, permitindo acesso tanto \u00e0s informa\u00e7\u00f5es na mem\u00f3ria do PC quanto \u00e0s sequ\u00eancias de sinal da periferia. E diversas maneiras de ativar o VISA foram encontradas.<\/p>\n

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

\"A<\/p>\n

Ativar o VISA e obter, por exemplo, acesso a webcams foi poss\u00edvel em uma placa-m\u00e3e comum. Nenhum equipamento especial foi necess\u00e1rio para isso. Este e outro exemplo foram demonstrados pelos especialistas da Positive Technologies durante uma apresenta\u00e7\u00e3o na Black Hat. Ningu\u00e9m relaciona diretamente a presen\u00e7a do VISA com a NSA (por enquanto), exceto, \u00e9 claro, os conspiracionistas. No entanto, se existe a capacidade n\u00e3o documentada de ativar um analisador de sinal em qualquer sistema baseado em Intel, \u00e9 certo que em algum lugar isso ser\u00e1 ativado.<\/p>\n

<\/p>\n

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

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