{"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\/da\/blog\/news\/positive-technologies-soobshhila-o-nahodke-novoj-potentsialnoj-zakladki-v-chipah-intel","title":{"rendered":"Positive Technologies har rapporteret om opdagelsen af en ny potentiel 'backdoor' i Intel-chips","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Der er n\u00e6ppe nogen, der vil bestride, at processorer er ret komplekse l\u00f8sninger, som simpelthen ikke kan fungere uden selvdiagnostik og avancerede kontrolmidler, b\u00e5de under fremstillingen og i driftsprocessen. Udviklerne er simpelthen n\u00f8dt til at have midler til \"herred\u00f8mme\" for at v\u00e6re helt sikre p\u00e5, at produktet er i orden. Og disse v\u00e6rkt\u00f8jer forsvinder ikke. Fremover kan alle disse diagnosemidler, der er en del af processoren, tjene gode form\u00e5l i form af teknologier til fjernkontrol som Intel AMT, men de kan ogs\u00e5 potentielt blive en bagd\u00f8r for efterretningstjenester eller kriminelle, hvilket ofte for brugeren betyder det samme.<\/p>\n

\"Positive<\/p>\n

Som du m\u00e5ske husker, opdagede specialister fra Positive Technologies i maj 2016, at Intel Management Engine 11-modulet til implementering af AMT-teknologi i systemhubben (PCH) havde gennemg\u00e5et betydelige \u00e6ndringer og blev s\u00e5rbart over for angreb fra ondsindede akt\u00f8rer. Inden version IME 11 var modulet bygget p\u00e5 en unik arkitektur og udgjorde ikke en s\u00e6rlig fare uden speciel dokumentation; det kunne dog \u00e5bne adgang til information i PC'ens hukommelse. Fra version IME 11 blev modulet x86-kompatibelt og tilg\u00e6ngeligt for studier af en bredere offentlighed (l\u00e6s mere om s\u00e5rbarheden INTEL-SA-00086 her og videre i links). Desuden blev der et \u00e5r senere identificeret en forbindelse mellem IME og et overv\u00e5gningsprogram fra NSA. Yderligere unders\u00f8gelser af IME f\u00f8rte til opdagelsen af endnu en potentiel \"skjult funktion\" i controllere og processorer fra Intel, som blev pr\u00e6senteret af specialisterne Maksim Goryachiy og Mark Ermolov p\u00e5 Black Hat-konferencen i Singapore i g\u00e5r.<\/p>\n

I systemhubben PCH og i Intel-processorer er der blevet opdaget en multifunktionel signalanalysev\u00e6rkt\u00f8j VISA (Intel Visualization of Internal Signals Architecture). Mere pr\u00e6cist er VISA ogs\u00e5 et Intel v\u00e6rkt\u00f8j til at teste processorer for fejl. Dokumentationen til enheden er ikke offentligt tilg\u00e6ngelig, men det betyder ikke, at den ikke eksisterer. Unders\u00f8gelsen af VISA har afsl\u00f8ret, at en analysator, der oprindeligt er deaktiveret ved fabrikken, kan aktiveres af en angriber og vil give adgang b\u00e5de til information i PC'ens hukommelse samt til signalsekvenser fra periferiudstyr. Der er faktisk fundet flere m\u00e5der at aktivere VISA p\u00e5.<\/p>\n

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

\"Positive<\/p>\n

At aktivere VISA og f\u00e5 adgang til webkameraer lykkedes p\u00e5 et almindeligt bundkort. Der kr\u00e6vedes ikke noget specielt udstyr til dette. Dette og et andet eksempel blev demonstreret af eksperterne fra Positive Technologies under deres pr\u00e6sentation p\u00e5 Black Hat. Ingen forbinder direkte VISA med NSA (indtil videre) undtagen naturligvis konspirationsfolk. Men hvis der er en undocumented mulighed for at aktivere en signalanalysator i ethvert system baseret p\u00e5 Intel, s\u00e5 bliver den helt sikkert aktiveret et sted.<\/p>\n

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

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