{"id":111907,"date":"2023-12-01T21:10:27","date_gmt":"2023-12-01T19:10:27","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/logofail-ataka-na-uefi-proshivki-cherez-podstanovku-vredonosnyh-logotipov"},"modified":"2023-12-01T21:10:27","modified_gmt":"2023-12-01T19:10:27","slug":"logofail-ataka-na-uefi-proshivki-cherez-podstanovku-vredonosnyh-logotipov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/logofail-ataka-na-uefi-proshivki-cherez-podstanovku-vredonosnyh-logotipov","title":{"rendered":"LogoFAIL \u2014 napad na UEFI firmware putem zamjene malicioznih logotipa","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Istra\u017eiva\u010di iz tvrtke Binarly otkrili su niz ranjivosti u kodu za obradu slika koji se koristi u UEFI firmware raznih proizvo\u0111a\u010da. Ranjivosti omogu\u0107uju izvr\u0161avanje vlastitog koda prilikom podizanja sustava putem umetanja posebno oblikovane slike u particiju ESP (EFI System Partition) ili u dijelu a\u017euriranja firmwarea koji nije ovjeren digitalnim potpisom. Predlo\u017eena metoda napada mo\u017ee se koristiti za zaobila\u017eenje mehanizma verificirane podizanja UEFI Secure Boot i hardverskih za\u0161titnih mehanizama poput Intel Boot Guard, AMD Hardware-Validated Boot i ARM TrustZone Secure Boot. <\/p>\n

Problem je uzrokovan time \u0161to firmware omogu\u0107uje prikazivanje korisni\u010dki definiranih logotipa i koristi biblioteke za obradu slika koje se izvr\u0161avaju na razini firmwarea bez resetiranja privilegija. Napominje se da moderni firmware sadr\u017ee kod za obradu formata BMP, GIF, JPEG, PCX i TGA, u kojem se nalaze ranjivosti koje dovode do prepunjenja me\u0111uspremnika tijekom obrade neispravnih podataka. <\/p>\n

Ranjivosti su otkrivene u firmwareima koje isporu\u010duju razli\u010diti pru\u017eatelji opreme (Intel, Acer, Lenovo) i proizvo\u0111a\u010di firmwarea (AMI, Insyde, Phoenix). Budu\u0107i da se problemati\u010dni kod nalazi u referentnim komponentama koje pru\u017eaju neovisni pru\u017eatelji firmwarea, a koriste se kao osnova za izradu vlastitih firmwarea raznih proizvo\u0111a\u010da opreme, ranjivosti nisu specifi\u010dne za odre\u0111ene pru\u017eatelje i utje\u010du na cijelu ekosustav. <\/p>\n

Detalji o otkrivenim ranjivostima bit \u0107e objavljeni 6. prosinca na konferenciji Black Hat Europe 2023. Na prezentaciji konferencije bit \u0107e demonstriran i exploit koji omogu\u0107ava izvr\u0161avanje vlastitog koda s privilegijama firmwarea na sustavima s arhitekturom x86 i ARM. Izvorno su ranjivosti otkrivene tijekom analize firmwarea Lenovo temeljenih na platformama od Insyde, AMI i Phoenix, no potencijalno ranjivima se tako\u0111er spominju firmwarei od Intela i Acera.
\n
Izvor: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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