{"id":36939,"date":"2019-10-31T22:14:51","date_gmt":"2019-10-31T19:14:51","guid":{"rendered":"https:\/\/prohoster.info\/blog\/opublikovan-kod-analizatora-bezopasnosti-proshivok-fwanalyzer\/"},"modified":"2019-10-31T22:14:51","modified_gmt":"2019-10-31T19:14:51","slug":"opublikovan-kod-analizatora-bezopasnosti-proshivok-fwanalyzer","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/opublikovan-kod-analizatora-bezopasnosti-proshivok-fwanalyzer","title":{"rendered":"Megjelent a FwAnalyzer firmware biztons\u00e1gi elemz\u0151 k\u00f3dja","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A Cruise c\u00e9g, amely az \u00f6nvezet\u0151 aut\u00f3k technol\u00f3gi\u00e1j\u00e1ra specializ\u00e1l\u00f3dott, megnyitotta<\/a><\/noindex> a projekt forr\u00e1sk\u00f3dj\u00e1t FwAnalyzer<\/a><\/noindex>, amely eszk\u00f6z\u00f6ket biztos\u00edt a Linux alap\u00fa firmware k\u00e9pek elemz\u00e9s\u00e9re \u00e9s a potenci\u00e1lis sebezhet\u0151s\u00e9gek, adatlop\u00e1sok felt\u00e9rk\u00e9pez\u00e9s\u00e9re. A k\u00f3d Go nyelven \u00edr\u00f3dott, \u00e9s terjeszt\u00e9sre ker\u00fcl<\/a><\/noindex> Apache 2.0 licenc alatt.<\/p>\n

t\u00e1mogatja az ext2\/3\/4, FAT\/VFat, SquashFS \u00e9s UBIFS f\u00e1jlrendszereket. A k\u00e9pekhez haszn\u00e1lt szabv\u00e1nyos eszk\u00f6z\u00f6k, mint p\u00e9ld\u00e1ul az e2tools, mtools, squashfs-tools \u00e9s ubi_reader seg\u00edts\u00e9g\u00e9vel ny\u00edlik meg a k\u00e9p. A FwAnalyzer kinyeri a k\u00f6nyvt\u00e1rf\u00e1t a k\u00e9pb\u0151l, \u00e9s a tartalom \u00e9rt\u00e9kel\u00e9s\u00e9t egy szab\u00e1lyk\u00e9szlet alapj\u00e1n v\u00e9gzi. A szab\u00e1lyok a f\u00e1jlrendszer, a f\u00e1jlt\u00edpus \u00e9s a tartalom metainform\u00e1ci\u00f3ihoz k\u00f6thet\u0151k. A kimenet egy JSON form\u00e1tum\u00fa jelent\u00e9s, amely \u00f6sszegzi a firmware-b\u0151l kinyert inform\u00e1ci\u00f3kat, \u00e9s figyelmeztet\u00e9seket ad, valamint felsorolja azokat a f\u00e1jlokat, amelyek nem felelnek meg a feldolgozott szab\u00e1lyoknak. <\/p>\n

T\u00e1mogatja a f\u00e1jlok \u00e9s k\u00f6nyvt\u00e1rak hozz\u00e1f\u00e9r\u00e9si jogainak ellen\u0151rz\u00e9s\u00e9t (p\u00e9ld\u00e1ul az \u00edr\u00e1sra val\u00f3 hozz\u00e1f\u00e9r\u00e9s \u00e9s a nem megfelel\u0151 UID\/GID be\u00e1ll\u00edt\u00e1sok azonos\u00edt\u00e1s\u00e1t), a suid z\u00e1szl\u00f3val rendelkez\u0151 v\u00e9grehajthat\u00f3 f\u00e1jlok megl\u00e9t\u00e9t, valamint SELinux c\u00edmk\u00e9k haszn\u00e1lat\u00e1t, az elfelejtett titkos\u00edt\u00e1si kulcsokat \u00e9s a potenci\u00e1lisan vesz\u00e9lyes f\u00e1jlokat. A tartalomban kiemel\u00e9sre ker\u00fclnek a h\u00e1trahagyott m\u00e9rn\u00f6ki jelszavak \u00e9s debug adatok, verzi\u00f3inform\u00e1ci\u00f3k tal\u00e1lhat\u00f3k, SHA-256 hash-ek alapj\u00e1n azonos\u00edt\u00e1s\/ellen\u0151rz\u00e9s t\u00f6rt\u00e9nik, \u00e9s statikus maszkokkal, valamint regul\u00e1ris kifejez\u00e9sekkel t\u00f6rt\u00e9nik a keres\u00e9s. K\u00fcls\u0151 elemz\u0151szkriptek kapcsol\u00f3dhatnak bizonyos f\u00e1jlt\u00edpusokhoz. Android alap\u00fa firmware-ek eset\u00e9n a gy\u00e1rt\u00e1si param\u00e9terek (p\u00e9ld\u00e1ul a ro.secure=1 m\u00f3d haszn\u00e1lata, a ro.build.type \u00e1llapota \u00e9s a SELinux aktiv\u00e1l\u00e1sa) azonos\u00edthat\u00f3k.<\/p>\n

A FwAnalyzer seg\u00edthet a harmadik f\u00e9l firmware-einek biztons\u00e1gi probl\u00e9m\u00e1inak elemz\u00e9s\u00e9ben, de alapvet\u0151 c\u00e9lja a saj\u00e1t firmware-jeink, illetve a szerz\u0151d\u00e9ses harmadik f\u00e9l \u00e1ltal biztos\u00edtott firmware-ek min\u0151s\u00e9g\u00e9nek ellen\u0151rz\u00e9se. A FwAnalyzer szab\u00e1lyai lehet\u0151v\u00e9 teszik a firmware \u00e1llapot\u00e1nak pontos specifik\u00e1l\u00e1s\u00e1t, \u00e9s az elfogadhatatlan elt\u00e9r\u00e9sek azonos\u00edt\u00e1s\u00e1t, mint p\u00e9ld\u00e1ul nem megfelel\u0151 jogosults\u00e1gok kiad\u00e1sa vagy z\u00e1rt kulcsok \u00e9s hibakeres\u0151 k\u00f3d h\u00e1trahagy\u00e1sa (p\u00e9ld\u00e1ul a vizsg\u00e1lat elker\u00fcl\u00e9se \u00e9rdek\u00e9ben, mint p\u00e9ld\u00e1ul h\u00e1trahagy\u00e1s<\/a><\/noindex> a tesztel\u00e9si f\u00e1zisban haszn\u00e1lt ssh szerver, el\u0151re defini\u00e1lt<\/a><\/noindex> m\u00e9rn\u00f6ki jelsz\u00f3, el\u00e9rhet\u0151<\/a><\/noindex> a \/etc\/config\/shadow f\u00e1jl olvas\u00e1sa vagy elfelejtett<\/a><\/noindex> kulcsok<\/a><\/noindex> digit\u00e1lis al\u00e1\u00edr\u00e1s l\u00e9trehoz\u00e1sa).<\/p>\n

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

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

Forr\u00e1s: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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