{"id":52697,"date":"2019-11-14T00:00:00","date_gmt":"2019-11-13T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/uyazvimost-tpm-fail-pozvolyayushhaya-vosstanovit-klyuchi-hranimye-v-tpm-modulyah"},"modified":"2020-02-18T14:00:29","modified_gmt":"2020-02-18T11:00:29","slug":"uyazvimost-tpm-fail-pozvolyayushhaya-vosstanovit-klyuchi-hranimye-v-tpm-modulyah","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/news\/uyazvimost-tpm-fail-pozvolyayushhaya-vosstanovit-klyuchi-hranimye-v-tpm-modulyah","title":{"rendered":"Vulnerabiliteti TPM-Fail, q\u00eb lejon rikthimin e \u00e7el\u00ebsave t\u00eb ruajtur n\u00eb modulat TPM","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Grupi i k\u00ebrkuesve nga Instituti Politeknik i Worcester, Universiteti i L\u00fcbeck dhe Universiteti i Kalifornis\u00eb n\u00eb San Diego ka zhvilluar<\/a><\/noindex> metod\u00eb sulmi p\u00ebr kanale an\u00ebsore, e cila lejon rikuperimin e vlerave t\u00eb \u00e7el\u00ebsave t\u00eb fsheht\u00eb, t\u00eb ruajtura n\u00eb TPM (Moduli i Platform\u00ebs s\u00eb Besuar). Sulmi mori emrin e koduar TPM-Fail<\/a><\/noindex> dhe p\u00ebrfshin fTPM (implementim softuerik<\/a><\/noindex> i bazuar n\u00eb firmware q\u00eb punon n\u00eb nj\u00eb mikroprocesor t\u00eb ve\u00e7ant\u00eb brenda CPU) nga kompania Intel (CVE-2019-11090) dhe TPM hardueror\u00eb n\u00eb \u00e7ipat e STMicroelectronics ST33<\/a><\/noindex> (CVE-2019-16863).<\/p>\n

K\u00ebrkuesit publikuan<\/a><\/noindex> protokolin e mjeteve p\u00ebr realizimin e sulmit dhe demonstruan mund\u00ebsin\u00eb e rikuperimit t\u00eb \u00e7el\u00ebsit t\u00eb fsheht\u00eb 256-bit, t\u00eb p\u00ebrdorur p\u00ebr formimin e n\u00ebnshkrimeve digjitale duke p\u00ebrdorur algoritme t\u00eb bazuara n\u00eb kurba eliptike ECDSA dhe EC-Schnorr. N\u00eb var\u00ebsi t\u00eb t\u00eb drejtave t\u00eb aksesit, koha e p\u00ebrgjithshme e sulmit n\u00eb sistemet Intel fTPM \u00ebsht\u00eb 4-20 minuta dhe k\u00ebrkon analiz\u00ebn e 1-15 mij\u00eb operacioneve. P\u00ebr sulmin n\u00eb sistemet me \u00e7ipin ST33 nevojiten rreth 80 minuta dhe analiza e rreth 40 mij\u00eb operacioneve t\u00eb gjenerimit t\u00eb n\u00ebnshkrimeve digjitale. <\/p>\n

K\u00ebrkuesit gjithashtu demonstruan mund\u00ebsin\u00eb e realizimit t\u00eb nj\u00eb sulmi t\u00eb larg\u00ebt n\u00eb rrjetet me shpejt\u00ebsi t\u00eb lart\u00eb, duke lejuar n\u00eb nj\u00eb rrjet lokal me band\u00eb 1GB n\u00eb kushte laboratorike p\u00ebr t\u00eb rikuperuar \u00e7el\u00ebsin e fsheht\u00eb pas matjes s\u00eb koh\u00ebs s\u00eb p\u00ebrgjigjes p\u00ebr 45 mij\u00eb seanca autentikimi me serverin VPN t\u00eb bazuar n\u00eb software-in strongSwan, i cili ruan \u00e7el\u00ebsat e tij n\u00eb TPM-n\u00eb e vunerueshme.<\/p>\n

Metoda e sulmit bazohet n\u00eb analizimin e diferencave n\u00eb koha e ekzekutimit t\u00eb operacioneve gjat\u00eb procesit t\u00eb gjenerimit t\u00eb n\u00ebnshkrimit digjital. Vler\u00ebsimi i vones\u00ebs gjat\u00eb kryerjes s\u00eb llogaritjeve lejon p\u00ebrcaktimin e informacionit mbi bitet individuale gjat\u00eb kryerjes s\u00eb shum\u00ebzimit me skalar gjat\u00eb operacioneve me kurb\u00ebn eliptike. P\u00ebr ECDSA, identifikimi madje i disa bit\u00ebve me informacion mbi vektorin e inicializimit (nonce) \u00ebsht\u00eb i mjaftuesh\u00ebm p\u00ebr kryerjen e sulmit p\u00ebr rikuperimin e t\u00eb gjith\u00eb \u00e7el\u00ebsit t\u00eb fsheht\u00eb n\u00eb m\u00ebnyr\u00eb sekondare. P\u00ebr t\u00eb realizuar me sukses sulmin, k\u00ebrkohet analiza e koh\u00ebs s\u00eb gjenerimit t\u00eb disa mij\u00ebra n\u00ebnshkrimeve digjitale, t\u00eb krijuara mbi t\u00eb dh\u00ebnat e njohura p\u00ebr sulmuesin.<\/p>\n

Vulnerabiliteti \u00ebsht\u00eb eliminuar<\/a><\/noindex> nga kompania STMicroelectronics n\u00eb edicionin e ri t\u00eb \u00e7ipave, n\u00eb t\u00eb cil\u00ebt realizimi i algoritmit ECDSA \u00ebsht\u00eb \u00e7liruar nga korrelacionet me koh\u00ebn e ekzekutimit t\u00eb operacioneve. interesting that \u00e7ipat e prekur nga problemi i STMicroelectronics p\u00ebrdoren gjithashtu n\u00eb pajisjet q\u00eb p\u00ebrputhen me nivelin e siguris\u00eb CommonCriteria (CC) EAL 4+. K\u00ebrkuesit gjithashtu kontrolluan \u00e7ipat TPM t\u00eb kompanive Infineon dhe Nuvoton, por n\u00eb to mungon rrjedhja mbi baz\u00ebn e ndryshimit t\u00eb koh\u00ebs s\u00eb llogaritjeve.<\/p>\n

N\u00eb procesor\u00ebt Intel, problemi shfaqet duke filluar nga familja Haswell e nxjerr\u00eb n\u00eb vitin 2013. V\u00ebrehet se nj\u00eb gam\u00eb e gjer\u00eb laptop\u00ebsh, PC-sh dhe server\u00ebsh, t\u00eb prodhuar nga prodhues t\u00eb ndrysh\u00ebm p\u00ebrfshir\u00eb Dell, Lenovo dhe HP, jan\u00eb t\u00eb prekur nga problemi.<\/p>\n

Kompania Intel p\u00ebrfshiu nj\u00eb rregullim n\u00eb aktualizimin e tij t\u00eb n\u00ebntorit<\/a><\/noindex> t\u00eb firmuerve, n\u00eb t\u00eb cilin, p\u00ebrve\u00e7 problemit t\u00eb shqyrtuar, eliminim<\/a><\/noindex> jan\u00eb zbuluar gjithsej 24 vulnerabilitete, prej t\u00eb cilave n\u00ebnt\u00eb jan\u00eb ngjitur me nj\u00eb nivel t\u00eb lart\u00eb rreziku, nd\u00ebrsa nj\u00eb me rrezik t\u00eb lart\u00eb. P\u00ebr problemet e p\u00ebrmendura jepet vet\u00ebm informacion i p\u00ebrgjithsh\u00ebm, p\u00ebr shembull, p\u00ebrmendet q\u00eb vulnerabiliteti kritik (CVE-2019-0169) \u00ebsht\u00eb shkaktuar nga mund\u00ebsia e krijimit t\u00eb nj\u00eb mbushjeje t\u00eb pile n\u00eb an\u00ebn e ambienteve Intel CSME (Converged Security and Management Engine) dhe Intel TXE (Trusted Execution Engine), q\u00eb i lejon nj\u00eb sulmuesi t\u00eb rris\u00eb privilegjet e tij dhe t\u00eb fitoj\u00eb qasje n\u00eb t\u00eb dh\u00ebna t\u00eb ndjeshme.<\/p>\n

Gjithashtu mund t\u00eb theksohet zbardhja<\/a><\/noindex> e rezultateve t\u00eb auditimit t\u00eb ndrysh\u00ebm SDK-ve p\u00ebr zhvillimin e aplikacioneve q\u00eb nd\u00ebrveprojn\u00eb me kodin q\u00eb ekzekutohet n\u00eb an\u00ebt izoluara. Me q\u00ebllim zbuluar funksionet problematike q\u00eb mund t\u00eb p\u00ebrdoren p\u00ebr t\u00eb kryer sulme, jan\u00eb studiuar tet\u00eb SDK: Intel SGX-SDK<\/a><\/noindex>, SGX-LKL<\/a><\/noindex>, Microsoft OpenEnclave<\/a><\/noindex>, Graphene<\/a><\/noindex>,
\nRust-EDP<\/a><\/noindex> \u0438 Google Asylo<\/a><\/noindex> p\u00ebr Intel SGX, Keystone<\/a><\/noindex> p\u00ebr RISC-V dhe Sancus<\/a><\/noindex> p\u00ebr Sancus TEE. Gjat\u00eb auditimit u zbuluan u identifikua<\/a><\/noindex> 35 vulnerabilitete, mbi baz\u00ebn e t\u00eb cilave jan\u00eb zhvilluar disa skenar\u00eb sulmi, duke lejuar q\u00eb t\u00eb nxirren \u00e7el\u00ebsat AES nga enklava ose t\u00eb organizohet ekzekutimi i kodit t\u00eb tij p\u00ebrmes krijimit t\u00eb kushteve p\u00ebr d\u00ebmtimin e p\u00ebrmbajtjes s\u00eb memories.<\/p>\n

\"Vulnerabiliteti<\/a><\/noindex><\/center><\/p>\n

<\/a><\/noindex><\/p>\n

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

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