A Buildroot rendszer\u00e9ben, amely az Embedded rendszerek Linux ind\u00edt\u00f3 k\u00f6rnyezet\u00e9nek kialak\u00edt\u00e1s\u00e1ra \u00f6sszpontos\u00edt, hat sebezhet\u0151s\u00e9get fedeztek fel, amelyek lehet\u0151v\u00e9 teszik, hogy a tranzitforgalom (MITM) lehallgat\u00e1sa sor\u00e1n m\u00f3dos\u00edt\u00e1sokat v\u00e9gezzenek a gener\u00e1lt rendszerk\u00e9peken, vagy k\u00f3d v\u00e9grehajt\u00e1s\u00e1t szervezzenek a build rendszer szintj\u00e9n. A sebezhet\u0151s\u00e9geket a Buildroot 2023.02.8, 2023.08.4 \u00e9s 2023.11 verzi\u00f3kban orvosolt\u00e1k. <\/p>\n
Az els\u0151 \u00f6t sebezhet\u0151s\u00e9g (CVE-2023-45841, CVE-2023-45842, CVE-2023-45838, CVE-2023-45839, CVE-2023-45840) a csomagok integrit\u00e1s\u00e1nak ellen\u0151rz\u00e9s\u00e9re szolg\u00e1l\u00f3 hash k\u00f3dot \u00e9rinti. A probl\u00e9ma az HTTP haszn\u00e1lat\u00e1nak lehet\u0151s\u00e9g\u00e9b\u0151l ad\u00f3dik a f\u00e1jlok let\u00f6lt\u00e9s\u00e9re \u00e9s a ellen\u0151rz\u0151 hash f\u00e1jlok hi\u00e1ny\u00e1b\u00f3l n\u00e9h\u00e1ny csomagn\u00e1l, amely lehet\u0151v\u00e9 teszi a csomagadatok tartalm\u00e1nak m\u00f3dos\u00edt\u00e1s\u00e1t, ha valaki bele tud keveredni a build forgalm\u00e1ba. a szerver<\/a> (p\u00e9ld\u00e1ul, ha a felhaszn\u00e1l\u00f3 egy t\u00e1mad\u00f3 \u00e1ltal ir\u00e1ny\u00edtott vezet\u00e9k n\u00e9lk\u00fcli h\u00e1l\u00f3zaton kereszt\u00fcl csatlakozik). <\/p>\n K\u00fcl\u00f6n\u00f6sen az aufs \u00e9s aufs-util csomagok HTTP-n kereszt\u00fcl t\u00f6lt\u0151dtek le, \u00e9s nem ellen\u0151rizt\u00e9k \u0151ket hash-\u00e9rt\u00e9kekkel. A hash-\u00e9rt\u00e9kek szint\u00e9n hi\u00e1nyoztak a riscv64-elf-toolchain, versal-firmware \u00e9s mxsldr csomagok eset\u00e9ben, amelyek alap\u00e9rtelmez\u00e9s szerint HTTPS-en kereszt\u00fcl t\u00f6lt\u0151dtek le, de probl\u00e9m\u00e1k eset\u00e9n vissza\u00e1lltak a titkos\u00edtatlan let\u00f6lt\u00e9sre a http:\/\/sources.buildroot.net hosztr\u00f3l. Hash f\u00e1jlok hi\u00e1ny\u00e1ban a Buildroot eszk\u00f6z a let\u00f6lt\u00e9st sikeresnek \u00edt\u00e9lte, \u00e9s feldolgozta a let\u00f6lt\u00f6tt csomagokat, bele\u00e9rtve a csomagokhoz tartoz\u00f3 jav\u00edt\u00e1sok alkalmaz\u00e1s\u00e1t \u00e9s a build szkriptek v\u00e9grehajt\u00e1s\u00e1t. A let\u00f6lt\u00f6tt csomagok manipul\u00e1l\u00e1s\u00e1nak lehet\u0151s\u00e9g\u00e9vel a t\u00e1mad\u00f3 saj\u00e1t jav\u00edt\u00e1saikat vagy Makefile build f\u00e1jlokat adhatott hozz\u00e1, amely lehet\u0151v\u00e9 tette a v\u00e9gs\u0151 k\u00e9pet vagy az \u00e9p\u00edt\u00e9si rendszer szkripteit m\u00f3dos\u00edt\u00e1sok v\u00e9grehajt\u00e1s\u00e1t \u00e9s saj\u00e1t k\u00f3dja v\u00e9grehajt\u00e1s\u00e1t. <\/p>\n A hatodik sebezhet\u0151s\u00e9g (CVE-2023-43608) egy BR_NO_CHECK_HASH_FOR funkci\u00f3 megval\u00f3s\u00edt\u00e1s\u00e1nak hib\u00e1j\u00e1b\u00f3l ad\u00f3dik, amely lehet\u0151v\u00e9 teszi a hash alapj\u00e1n t\u00f6rt\u00e9n\u0151 integrit\u00e1s-ellen\u0151rz\u00e9s kikapcsol\u00e1s\u00e1t bizonyos csomagok eset\u00e9n. N\u00e9h\u00e1ny csomag, mint p\u00e9ld\u00e1ul a Linux kernel, U-Boot \u00e9s versal-firmware, lehet\u0151v\u00e9 tette a leg\u00fajabb verzi\u00f3k let\u00f6lt\u00e9s\u00e9t, amelyekhez m\u00e9g nem \u00e1lltak rendelkez\u00e9sre ellen\u0151rz\u0151 hash-ek. Ezekhez a verzi\u00f3khoz a BR_NO_CHECK_HASH_FOR opci\u00f3t alkalmazt\u00e1k, amely letiltja a hash szerinti ellen\u0151rz\u00e9st. Az adatok HTTPS-en kereszt\u00fcl t\u00f6lt\u0151dtek le, de alap\u00e9rtelmez\u00e9s szerint hiba eset\u00e9n a let\u00f6lt\u00e9s visszav\u00e1ltott a kapcsolat n\u00e9lk\u00fcli http:\/\/source.buildroot.net megkeres\u00e9s\u00e9re. A t\u00e1mad\u00f3 a MITM-t\u00e1mad\u00e1s sor\u00e1n blokkolhatta a HTTPS kiszolg\u00e1l\u00f3hoz val\u00f3 kapcsol\u00f3d\u00e1st, \u00edgy a let\u00f6lt\u00e9s visszav\u00e1ltott a http:\/\/sources.buildroot.net c\u00edmre. \u0412 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0441\u0431\u043e\u0440\u043a\u0438 Buildroot, \u043d\u0430\u0446\u0435\u043b\u0435\u043d\u043d\u043e\u0439 \u043d\u0430 \u0444\u043e\u0440\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u0437\u0430\u0433\u0440\u0443\u0437\u043e\u0447\u043d\u044b\u0445 Linux-\u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u0439 \u0434\u043b\u044f \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u043c\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0448\u0435\u0441\u0442\u044c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0445 \u0432 \u0445\u043e\u0434\u0435 \u043f\u0435\u0440\u0435\u0445\u0432\u0430\u0442\u0430 \u0442\u0440\u0430\u043d\u0437\u0438\u0442\u043d\u043e\u0433\u043e \u0442\u0440\u0430\u0444\u0438\u043a\u0430 (MITM) \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0432\u043d\u0435\u0441\u0435\u043d\u0438\u044f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439 \u0432 \u0433\u0435\u043d\u0435\u0440\u0438\u0440\u0443\u0435\u043c\u044b\u0435 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u0435 \u043e\u0431\u0440\u0430\u0437\u044b \u0438\u043b\u0438 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043a\u043e\u0434\u0430 \u043d\u0430 \u0443\u0440\u043e\u0432\u043d\u0435 \u0441\u0431\u043e\u0440\u043e\u0447\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0432 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0445 Buildroot 2023.02.8, 2023.08.4 \u0438 2023.11. \u041f\u0435\u0440\u0432\u044b\u0435 \u043f\u044f\u0442\u044c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2023-45841, CVE-2023-45842, CVE-2023-45838, CVE-2023-45839, CVE-2023-45840) \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u044e\u0442 […]<\/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-112136","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\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\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Sebezhet\u0151s\u00e9gek a Buildroot-ban, amelyek lehet\u0151v\u00e9 teszik a k\u00f3d 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Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"