{"id":33743,"date":"2019-10-31T21:54:27","date_gmt":"2019-10-31T18:54:27","guid":{"rendered":"https:\/\/prohoster.info\/blog\/intel-vam-ne-nuzhno-otklyuchat-hyper-threading-dlya-zashhity-ot-zombieload\/"},"modified":"2019-10-31T21:54:27","modified_gmt":"2019-10-31T18:54:27","slug":"intel-vam-ne-nuzhno-otklyuchat-hyper-threading-dlya-zashhity-ot-zombieload","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/intel-vam-ne-nuzhno-otklyuchat-hyper-threading-dlya-zashhity-ot-zombieload","title":{"rendered":"Intel: nu trebuie s\u0103 dezactiva\u021bi Hyper-Threading pentru a v\u0103 proteja de ZombieLoad","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Dac\u0103 dup\u0103 . Pentru cei care s-au al\u0103turat recent: dezvolt\u0103m un IDE pentru a lucra cu API-ul TestMace. Cea mai frecvent\u0103 \u00eentrebare c\u00e2nd compar\u0103m TestMace cu produsele concurente este: \u201eCe v\u0103 diferen\u021biaz\u0103 de Postman?\u201d. Am decis c\u0103 este timpul s\u0103 oferim un r\u0103spuns detaliat la aceast\u0103 \u00eentrebare. Mai jos am enumerat avantajele noastre \u00een fa\u021ba<\/a><\/noindex> \u0219tiri<\/a><\/noindex> Dac\u0103 te afli \u00een panic\u0103 \u0219i cau\u021bi s\u0103 dezactivezi func\u021bia Intel Hyper-Threading pentru a preveni utilizarea unei noi vulnerabilit\u0103\u021bi, similar\u0103 cu Spectre \u0219i Meltdown, f\u0103 o respira\u021bie ad\u00e2nc\u0103 \u2014 ghidul oficial Intel nu recomand\u0103 de fapt acest lucru \u00een majoritatea cazurilor.<\/p>\n

\"Intel:<\/p>\n

ZombieLoad este similar cu atacurile anterioare prin \u201ecanale laterale\u201d (eng. side-channel attack), care for\u021beaz\u0103 procesoarele Intel s\u0103 dezv\u0103luie accesul la informa\u021bii poten\u021bial confiden\u021biale, care sunt de obicei izolate \u0219i accesibile doar aplica\u021biilor care le utilizeaz\u0103. Anali\u0219tii de securitate au raportat anterior c\u0103 aceast\u0103 vulnerabilitate este prezent\u0103 \u00een majoritatea cipurilor Intel \u0219i poate fi exploatat\u0103 pe Windows, MacOS \u0219i Linux.<\/p>\n

\"Intel:<\/p>\n

Intel nu este de acord cu gravitatea evalu\u0103rii riscului ZombieLoad. Compania a decis chiar s\u0103 ofere ZombieLoad o alt\u0103 denumire \u2014 Microarchitectural Data Sampling (MDS) sau Selectarea Datelor Microarhitecturale. Recunoa\u0219te c\u0103 sun\u0103 mult mai pu\u021bin \u00eenfrico\u0219\u0103tor dec\u00e2t referin\u021ba la ni\u0219te zombi.<\/p>\n

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

\u201eVulnerabilitatea MDS se bazeaz\u0103 pe selectarea datelor care se scurg din mici structuri din CPU atunci c\u00e2nd se utilizeaz\u0103 un canal lateral executat local prin execu\u021bie speculativ\u0103\u201d, explic\u0103 compania. \u201eExploatarea practic\u0103 a MDS este o afacere foarte complicat\u0103. Vulnerabilitatea \u00een sine nu ofer\u0103 hackerului un mod de a alege acele date pe care dore\u0219te s\u0103 le ob\u021bin\u0103.\u201d<\/p>\n

\u201eMDS a fost deja remediat\u0103 la nivel hardware \u00een multe dintre recentele noastre procesoare Intel Core de genera\u021bia a 8-a \u0219i a 9-a, precum \u0219i \u00een familia de procesoare Intel Xeon Scalable de genera\u021bia a doua\u201d, se arat\u0103 \u00een mesajul companiei. \u201ePentru celelalte produse afectate, m\u0103surile de reducere a riscurilor sunt disponibile prin actualizarea microcodului, \u00eempreun\u0103 cu actualiz\u0103rile corespunz\u0103toare ale sistemului de operare \u0219i ale software-ului hypervisor, care sunt disponibile \u00eencep\u00e2nd de ast\u0103zi. Am pus la dispozi\u021bie mai multe informa\u021bii<\/a><\/noindex> pe site-ul nostru \u0219i continu\u0103m s\u0103 \u00eendemn\u0103m pe toat\u0103 lumea s\u0103 \u00ee\u0219i men\u021bin\u0103 sistemele actualizate, deoarece acesta este unul dintre cele mai bune moduri de a asigura securitatea.\u201d<\/p>\n

\"Intel:<\/p>\n

Reprezentan\u021bii Intel au men\u021bionat, de asemenea, c\u0103 grupul de cercetare ZombieLoad a colaborat cu compania \u0219i al\u021bi speciali\u0219ti din industria PC-urilor pentru a remedia vulnerabilitatea \u00eenainte ca aceasta s\u0103 devin\u0103 cunoscut\u0103 publicului. \u201eDorim s\u0103 ne exprim\u0103m recuno\u0219tin\u021ba fa\u021b\u0103 de cercet\u0103torii care au lucrat cu noi \u0219i partenerii no\u0219tri din industrie pentru contribu\u021bia lor la solu\u021bionarea coordonat\u0103 a acestei probleme.\u201d<\/p>\n

Ce se \u00eent\u00e2mpl\u0103 cu Hyper-Threading?<\/strong><\/p>\n

Intel a afirmat c\u0103 dezactivarea Hyper-Threading nu este o op\u021biune obligatorie \u0219i unic\u0103 pentru utilizatorii de PC-uri. De fapt, potrivit Intel, fiecare client decide singur ce s\u0103 fac\u0103. Dac\u0103 nu pute\u021bi garanta securitatea software-ului instalat, atunci da, probabil c\u0103 dezactivarea Hyper-Threading este o idee bun\u0103. Dac\u0103 software-ul provine doar din magazinul Microsoft, din departamentul IT sau este instalat din surse de \u00eencredere, probabil c\u0103 pute\u021bi l\u0103sa Hyper-Threading activat. Totul depinde, \u00eentr-adev\u0103r, doar de c\u00e2t de mult v\u0103 pas\u0103 de securitatea dumneavoastr\u0103.<\/p>\n

\u201eDeoarece factorii difer\u0103 semnificativ pentru diferi\u021bi clien\u021bi, Intel nu recomand\u0103 dezactivarea Hyper-Threading, deoarece este important s\u0103 \u00een\u021belegem c\u0103 aceasta nu este singura modalitate de a asigura protec\u021bia \u00eempotriva MDS \u0219i nu ofer\u0103 protec\u021bie de la sine\u201d, se spune \u00een declara\u021bia companiei.<\/p>\n

\u00cen acela\u0219i timp, reac\u021biile produc\u0103torilor de sisteme de operare difer\u0103.<\/p>\n

Google a lansat o actualizare pentru Chrome OS care dezactiveaz\u0103 \u00een mod implicit Hyper-Threading-ul pentru Chromebook-uri. Persoanele care doresc s\u0103 reactiveze tehnologia de multitasking pot face acest lucru singure, consider\u0103 reprezentan\u021bii companiei.<\/p>\n

Apple a lansat o actualizare pentru MacOS Mojave \u0219i a anun\u021bat c\u0103 clien\u021bii companiei, \u00een special cei care au cerin\u021be stricte de securitate, pot dezactiva singuri Hyper-Threading-ul.<\/p>\n

Microsoft a declarat c\u0103 a lansat patch-uri pentru software-ul s\u0103u pentru a reduce probabilitatea exploat\u0103rii MDS, dar a subliniat de asemenea c\u0103clien\u021bii trebuie s\u0103 ob\u021bin\u0103 suplimentar actualiz\u0103ri de firmware de la produc\u0103torii lor de PC.<\/p>\n

Av\u00e2nd \u00een vedere c\u0103 majoritatea furnizorilor de sisteme de operare au decis s\u0103 lase Hyper-Threading activat, amenin\u021barea ZombieLoad, aparent, nu este at\u00e2t de grav\u0103 cum p\u0103rea cu o zi \u00een urm\u0103. De asemenea, nu a existat p\u00e2n\u0103 acum niciun caz cunoscut de utilizare a vulnerabilit\u0103\u021bii \u00eentr-un atac real.<\/p>\n

\u00cen acela\u0219i timp, utilizarea patch-urilor f\u0103r\u0103 dezactivarea tehnologiei Hyper-Threading aproape c\u0103 nu reduce performan\u021ba procesorilor Intel.<\/p>\n

\"Intel:<\/p>\n

Dar nu ve\u021bi crede, dac\u0103 v\u0103 uita\u021bi la rezultatele test\u0103rii<\/a><\/noindex> impactului patch-urilor de securitate asupra performan\u021bei cu Hyper-Threading dezactivat. Compania sus\u021bine c\u0103 corec\u021biile de securitate, \u00eempreun\u0103 cu dezactivarea Hyper-Threading, au un impact suspect de mic asupra performan\u021bei.<\/p>\n

\"Intel:<\/p>\n

Portalul PCWorld<\/a><\/noindex> nu este deloc de acord cu opinia Intel c\u0103 dezactivarea Hyper-Threading nu reprezint\u0103 o problem\u0103 semnificativ\u0103, de\u0219i Intel demonstreaz\u0103 \u00een documentul s\u0103u c\u0103 performan\u021ba a r\u0103mas practic neschimbat\u0103. Problema const\u0103 \u00een artificialitatea testelor Intel atunci c\u00e2nd Hyper-Threading este dezactivat, deoarece compania nu a testat sarcini specifice de procesare \u00een paralel. Dac\u0103 Intel ar fi realizat teste cu Blender, Cinebench sau altele concepute pentru procesoare multicore \u0219i multi-thread, am fi v\u0103zut imediat un declin puternic \u00een performan\u021b\u0103.<\/p>\n

Pentru a sublinia c\u00e2t de important\u0103 este tehnologia Hyper-Threading, se poate observa pur \u0219i simplu procesoarele Intel i9-9900K la 500 USD \u0219i i7-9700K la 375 USD, care se diferen\u021biaz\u0103 \u00een principal prin suportul pentru Hyper-Threading. Dezactivarea Hyper-Threading pe procesoarele Intel ar fi o lovitur\u0103 enorm\u0103 pentru to\u021bi cei care apreciaz\u0103 performan\u021ba pe mai multe fire.<\/p>\n

Dar exist\u0103 \u0219i ve\u0219ti bune pentru cei care folosesc cele mai recente procesoare Intel. A\u0219a cum au declarat cei din companie, multe din cele mai recente procesoare de genera\u021bie a 8-a \u0219i a 9-a au deja corec\u021bii de microcod hardware, astfel \u00eenc\u00e2t posesorii de i9-9900K nu au motive s\u0103 dezactiveze Hyper-Threading. Amenin\u021barea ZombieLoad este aparent mai mare pentru procesoarele mai vechi. Proprietarii acestor sisteme vor trebui s\u0103 se bazeze pe actualiz\u0103rile sistemului de operare \u0219i software-ului, precum \u0219i pe eficacitatea solu\u021biilor lor antivirus, pentru a reduce riscul de a primi cod mali\u021bios. \u0218i amintim \u00eenc\u0103 o dat\u0103 c\u0103, p\u00e2n\u0103 acum, nu exist\u0103 informa\u021bii despre nicio atac folosind ZombieLoad.<\/p>\n

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

\u0415\u0441\u043b\u0438 \u043f\u043e\u0441\u043b\u0435 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0438\u0445 \u043d\u043e\u0432\u043e\u0441\u0442\u0435\u0439 \u043e ZombieLoad \u0432\u044b \u0432 \u043f\u0430\u043d\u0438\u043a\u0435 \u0432\u044b\u044f\u0441\u043d\u044f\u0435\u0442\u0435, \u043a\u0430\u043a \u043e\u0442\u043a\u043b\u044e\u0447\u0438\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u044e Intel Hyper-Threading, \u0447\u0442\u043e\u0431\u044b \u043f\u0440\u0435\u0434\u043e\u0442\u0432\u0440\u0430\u0442\u0438\u0442\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u043d\u043e\u0432\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u043f\u043e\u0445\u043e\u0436\u0435\u0439 \u043d\u0430 Spectre \u0438 Meltdown, \u0442\u043e \u0441\u0434\u0435\u043b\u0430\u0439\u0442\u0435 \u0433\u043b\u0443\u0431\u043e\u043a\u0438\u0439 \u0432\u044b\u0434\u043e\u0445 — \u043e\u0444\u0438\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0435 \u0440\u0443\u043a\u043e\u0432\u043e\u0434\u0441\u0442\u0432\u043e Intel \u0444\u0430\u043a\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u043d\u0435 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u0442 \u0434\u0435\u043b\u0430\u0442\u044c \u044d\u0442\u043e \u0434\u043b\u044f \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u0430 \u0441\u043b\u0443\u0447\u0430\u0435\u0432. ZombieLoad \u0430\u043d\u0430\u043b\u043e\u0433\u0438\u0447\u043d\u0430 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0438\u043c \u0430\u0442\u0430\u043a\u0430\u043c \u043f\u043e «\u043f\u043e\u0431\u043e\u0447\u043d\u044b\u043c \u043a\u0430\u043d\u0430\u043b\u0430\u043c» (\u0430\u043d\u0433\u043b. side-channel attack), \u0432\u044b\u043d\u0443\u0436\u0434\u0430\u044e\u0449\u0438\u043c \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u044b Intel \u043e\u0442\u043a\u0440\u044b\u0432\u0430\u0442\u044c […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":25423,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-33743","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\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\udd47Intel: nu trebuie s\u0103 dezactivezi Hyper-Threading pentru protec\u021bia \u00eempotriva ZombieLoad | ProHoster","description":"Dac\u0103 dup\u0103 ultimele \u0219tiri despre ZombieLoad e\u0219ti \u00een panic\u0103 \u0219i \u00eencerci s\u0103 afli 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