{"id":32375,"date":"2019-10-31T21:46:40","date_gmt":"2019-10-31T18:46:40","guid":{"rendered":"https:\/\/prohoster.info\/blog\/uyazvimost-v-chipah-qualcomm-pozvolyayushhaya-izvlech-zakrytye-klyuchi-iz-hranilishha-trustzone\/"},"modified":"2019-10-31T21:46:40","modified_gmt":"2019-10-31T18:46:40","slug":"uyazvimost-v-chipah-qualcomm-pozvolyayushhaya-izvlech-zakrytye-klyuchi-iz-hranilishha-trustzone","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sv\/blog\/news\/uyazvimost-v-chipah-qualcomm-pozvolyayushhaya-izvlech-zakrytye-klyuchi-iz-hranilishha-trustzone","title":{"rendered":"S\u00e5rbarhet i Qualcomm-chips som g\u00f6r det m\u00f6jligt att extrahera privata nycklar fr\u00e5n TrustZone-lagring","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Forskare fr\u00e5n NCC Group <noindex><a rel=\"nofollow\" href=\"https:\/\/www.nccgroup.trust\/us\/our-research\/private-key-extraction-qualcomm-keystore\/\">koden<\/a><\/noindex> <noindex>detaljer<\/noindex> s\u00e5rbarheter (<noindex><a rel=\"nofollow\" href=\"https:\/\/www.qualcomm.com\/company\/product-security\/bulletins#_CVE-2018-11976\">CVE-2018-11976<\/a><\/noindex>) i Qualcomm-chips, vilket g\u00f6r det m\u00f6jligt att identifiera inneh\u00e5llet av slutna krypteringsnycklar som lagras i den isolerade enklaven Qualcomm QSEE (Qualcomm Secure Execution Environment), som \u00e4r baserad p\u00e5 ARM TrustZone-teknologi. Problemet visar sig i <noindex><a rel=\"nofollow\" href=\"https:\/\/www.qualcomm.com\/company\/product-security\/bulletins\">de flesta<\/a><\/noindex> Snapdragon SoC, som anv\u00e4nds i smartphones baserade p\u00e5 Android-plattformen. \u00c5tg\u00e4rder f\u00f6r att l\u00f6sa problemet har redan <noindex><a rel=\"nofollow\" href=\"https:\/\/source.android.com\/security\/bulletin\/2019-04-01\">Rust-bindningar f\u00f6r<\/a><\/noindex> \u0432 \u0430\u043f\u0440\u0435\u043b\u044c\u0441\u043a\u043e\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 Android \u0438 \u0432 \u043d\u043e\u0432\u044b\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043f\u0440\u043e\u0448\u0438\u0432\u043e\u043a \u0434\u043b\u044f \u0447\u0438\u043f\u043e\u0432 Qualcomm. \u041d\u0430 \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043a\u0443 \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Qualcomm \u043f\u043e\u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043b\u043e\u0441\u044c \u0431\u043e\u043b\u044c\u0448\u0435 \u0433\u043e\u0434\u0430 &#8212; \u0438\u0437\u043d\u0430\u0447\u0430\u043b\u044c\u043d\u043e \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0431\u044b\u043b\u0438 \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u044b \u0432 Qualcomm \u0435\u0449\u0451 19 \u043c\u0430\u0440\u0442\u0430 2018 \u0433\u043e\u0434\u0430.<\/p>\n<p>Vi p\u00e5minner om att ARM TrustZone-teknologin m\u00f6jligg\u00f6r skapandet av h\u00e5rdvaru-isolerade skyddade milj\u00f6er som \u00e4r helt separerade fr\u00e5n det prim\u00e4ra systemet och exekveras p\u00e5 en separat virtuell processor med en speciell operativsystem. Huvudsyftet med TrustZone \u00e4r att s\u00e4kerst\u00e4lla isolerad exekvering av krypteringsnyckelhanterare, biometrisk autentisering, betalningsinformation och annan konfidentiell information. Interaktion med det prim\u00e4ra operativsystemet sker indirekt via ett dispatch-gr\u00e4nssnitt. Slutna krypteringsnycklar lagras inom ett h\u00e5rdvaru-isolerat nyckellager, vilket, vid korrekt implementering, f\u00f6rhindrar l\u00e4ckage vid kompromettering av det prim\u00e4ra systemet.<\/p>\n<p>S\u00e5rbarheten \u00e4r kopplad till ett bristande genomf\u00f6rande av algoritmen f\u00f6r elliptiska kurvor, vilket ledde till l\u00e4ckage av information om bearbetningsprocessen. Forskare har utvecklat en teknik f\u00f6r attacker via sidokanaler, vilket g\u00f6r det m\u00f6jligt att \u00e5terst\u00e4lla inneh\u00e5llet i slutna nycklar genom de indirekta l\u00e4ckorna. <noindex><a rel=\"nofollow\" href=\"https:\/\/developer.android.com\/training\/articles\/keystore.html\">Android Keystore<\/a><\/noindex>. L\u00e4ckor identifieras genom analys av aktiviteter i \u00f6verg\u00e5ngsf\u00f6ruts\u00e4gelseblock och tid f\u00f6r \u00e5tkomst till data i minnet. Under experimentet lyckades forskarna framg\u00e5ngsrikt demonstrera \u00e5terst\u00e4llning av 224- och 256-bitars ECDSA-nycklar fr\u00e5n det h\u00e5rdvaru-isolerade nyckellagret som anv\u00e4nds i Nexus 5X. F\u00f6r att \u00e5terst\u00e4lla nyckeln kr\u00e4vdes det att cirka 12 000 digitala signaturer genererades, vilket tog mer \u00e4n 14 timmar. F\u00f6r attacken anv\u00e4ndes verktygen <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/nccgroup\/cachegrab\">Cachegrab<\/a><\/noindex>.<\/p>\n<p>\u041e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u043f\u0440\u0438\u0447\u0438\u043d\u043e\u0439 \u0432\u043e\u0437\u043d\u0438\u043a\u043d\u043e\u0432\u0435\u043d\u0438\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u043d\u043e\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u043e\u0431\u0449\u0438\u0445 \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u044b\u0445 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432 \u0438 \u043a\u044d\u0448\u0430 \u0434\u043b\u044f \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439 \u0432  TrustZone \u0438 \u0432 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 &#8212; \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0430 \u043d\u0430 \u0443\u0440\u043e\u0432\u043d\u0435 \u043b\u043e\u0433\u0438\u0447\u0435\u0441\u043a\u043e\u0433\u043e \u0440\u0430\u0437\u0434\u0435\u043b\u0435\u043d\u0438\u044f, \u043d\u043e \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u043e\u0431\u0449\u0438\u0445 \u0432\u044b\u0447\u0438\u0441\u043b\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0445 \u0431\u043b\u043e\u043a\u043e\u0432 \u0438 \u0441 \u043e\u0441\u0435\u0434\u0430\u043d\u0438\u0435\u043c \u0441\u043b\u0435\u0434\u043e\u0432 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439 \u0438 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u043e\u0431 \u0430\u0434\u0440\u0435\u0441\u0430\u0445 \u043f\u0435\u0440\u0435\u0445\u043e\u0434\u043e\u0432 \u0432 \u043e\u0431\u0449\u0435\u043c \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u043d\u043e\u043c \u043a\u044d\u0448\u0435. \u041f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u043c\u0435\u0442\u043e\u0434\u0430 Prime+Probe, \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u043d\u0430 \u043e\u0446\u0435\u043d\u043a\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432\u0440\u0435\u043c\u0435\u043d\u0438 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u043f\u0440\u043e\u043a\u044d\u0448\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438, \u043c\u043e\u0436\u043d\u043e \u0447\u0435\u0440\u0435\u0437 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0443 \u043d\u0430\u043b\u0438\u0447\u0438\u044f \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u044b\u0445 \u0448\u0430\u0431\u043b\u043e\u043d\u043e\u0432 \u0432 \u043a\u044d\u0448\u0435 \u0441 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0432\u044b\u0441\u043e\u043a\u043e\u0439 \u0442\u043e\u0447\u043d\u043e\u0441\u0442\u044c\u044e \u043e\u0442\u0441\u043b\u0435\u0436\u0438\u0432\u0430\u0442\u044c \u043f\u043e\u0442\u043e\u043a\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0438 \u043f\u0440\u0438\u0437\u043d\u0430\u043a\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043a\u043e\u0434\u0430, \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u043e\u0433\u043e \u0441 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u044f\u043c\u0438 \u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0445 \u043f\u043e\u0434\u043f\u0438\u0441\u0435\u0439 \u0432 TrustZone.  <\/p>\n<p>St\u00f6rsta delen av tiden som g\u00e5r \u00e5t f\u00f6r att skapa en digital signatur med ECDSA-nycklar i Qualcomm-chips anv\u00e4nds f\u00f6r att utf\u00f6ra multiplikationsoperationer i cykler med en of\u00f6r\u00e4ndrad initialiseringsvektor f\u00f6r varje signatur (<noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Nonce\">nonce<\/a><\/noindex>). Om en angripare kan \u00e5terst\u00e4lla \u00e5tminstone n\u00e5gra bitar av information om denna vektor, finns det m\u00f6jlighet att genomf\u00f6ra en attack genom sekventiell \u00e5terst\u00e4llning av hela den privata nyckeln. <\/p>\n<p>\u0412 \u0441\u043b\u0443\u0447\u0430\u0435 \u0441 Qualcomm \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043e \u0434\u0432\u0430 \u043c\u0435\u0441\u0442\u0430 \u0443\u0442\u0435\u0447\u043a\u0438 \u043f\u043e\u0434\u043e\u0431\u043d\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u0432 \u0430\u043b\u0433\u043e\u0440\u0438\u0442\u043c\u0435 \u0443\u043c\u043d\u043e\u0436\u0435\u043d\u0438\u044f: \u043f\u0440\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0438 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 \u043f\u043e\u0438\u0441\u043a\u0430 \u0432 \u0442\u0430\u0431\u043b\u0438\u0446\u0430\u0445 \u0438 \u0432 \u043a\u043e\u0434\u0435 \u0443\u0441\u043b\u043e\u0432\u043d\u043e\u0433\u043e \u0438\u0437\u0432\u043b\u0435\u0447\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u0431\u0438\u0442\u0430 \u0432 \u0432\u0435\u043a\u0442\u043e\u0440\u0435 &#171;nonce&#187;. \u041d\u0435\u0441\u043c\u043e\u0442\u0440\u044f \u043d\u0430 \u043d\u0430\u043b\u0438\u0447\u0438\u0435 \u0432 \u043a\u043e\u0434\u0435 Qualcomm  \u043c\u0435\u0440 \u043f\u043e \u043f\u0440\u043e\u0442\u0438\u0432\u043e\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044e \u0443\u0442\u0435\u0447\u043a\u0430\u043c \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u0439 \u043f\u043e \u0441\u0442\u043e\u0440\u043e\u043d\u043d\u0438\u043c \u043a\u0430\u043d\u0430\u043b\u0430\u043c, \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0430\u043d\u043d\u044b\u0439 \u043c\u0435\u0442\u043e\u0434 \u0430\u0442\u0430\u043a\u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043e\u0431\u043e\u0439\u0442\u0438 \u044d\u0442\u0438 \u043c\u0435\u0440\u044b \u0438 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u044c \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u0431\u0438\u0442\u043e\u0432 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f &#171;nonce&#187;, \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u0434\u043b\u044f \u0432\u043e\u0441\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f 256-\u0440\u0430\u0437\u0440\u044f\u0434\u043d\u044b\u0445 \u043a\u043b\u044e\u0447\u0435\u0439 ECDSA.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>K\u00e4lla: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=50572\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 NCC Group \u0440\u0430\u0441\u043a\u0440\u044b\u043b\u0438 \u0434\u0435\u0442\u0430\u043b\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2018-11976) \u0432 \u0447\u0438\u043f\u0430\u0445 Qualcomm, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u044c \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435 \u0437\u0430\u043a\u0440\u044b\u0442\u044b\u0445 \u043a\u043b\u044e\u0447\u0435\u0439 \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u044f, \u0440\u0430\u0437\u043c\u0435\u0449\u0451\u043d\u043d\u044b\u0445 \u0432 \u0438\u0437\u043e\u043b\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c \u0430\u043d\u043a\u043b\u0430\u0432\u0435 Qualcomm QSEE (Qualcomm Secure Execution Environment), \u043e\u0441\u043d\u043e\u0432\u0430\u043d\u043d\u043e\u043c \u043d\u0430 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438 ARM TrustZone. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432 \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u0435 SoC Snapdragon, \u043f\u043e\u043b\u0443\u0447\u0438\u0432\u0448\u0438\u0445 \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435 \u0432 \u0441\u043c\u0430\u0440\u0442\u0444\u043e\u043d\u0430\u0445 \u043d\u0430 \u0431\u0430\u0437\u0435 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b Android. \u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f, \u0443\u0441\u0442\u0440\u0430\u043d\u044f\u044e\u0449\u0438\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0443, \u0443\u0436\u0435 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u044b \u0432 \u0430\u043f\u0440\u0435\u043b\u044c\u0441\u043a\u043e\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 [&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-32375","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 NCC Group \u0440\u0430\u0441\u043a\u0440\u044b\u043b\u0438 \u0434\u0435\u0442\u0430\u043b\u0438 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