{"id":112136,"date":"2023-12-11T15:10:27","date_gmt":"2023-12-11T13:10:27","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-buildroot-pozvolyayushhie-cherez-mitm-ataku-vypolnit-kod-na-sborochnom-servere"},"modified":"2023-12-11T15:10:27","modified_gmt":"2023-12-11T13:10:27","slug":"uyazvimosti-v-buildroot-pozvolyayushhie-cherez-mitm-ataku-vypolnit-kod-na-sborochnom-servere","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/uyazvimosti-v-buildroot-pozvolyayushhie-cherez-mitm-ataku-vypolnit-kod-na-sborochnom-servere","title":{"rendered":"Vulnerabilit\u00e0 in Buildroot che consentono tramite un attacco MITM di eseguire codice sul server di build","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Nel sistema di build Buildroot, progettato per generare ambienti Linux avviabili per sistemi embedded, sono state individuate sei vulnerabilit\u00e0 che consentono, durante l'intercettazione del traffico di transito (MITM), di apportare modifiche alle immagini di sistema generate o di eseguire codice a livello di sistema di build. Le vulnerabilit\u00e0 sono state risolte nelle versioni Buildroot 2023.02.8, 2023.08.4 e 2023.11. <\/p>\n

Le prime cinque vulnerabilit\u00e0 (CVE-2023-45841, CVE-2023-45842, CVE-2023-45838, CVE-2023-45839, CVE-2023-45840) riguardano il codice di verifica dell'integrit\u00e0 dei pacchetti tramite hash. I problemi derivano dalla possibilit\u00e0 di utilizzare HTTP per scaricare file e dalla mancanza di file hash di verifica per alcuni pacchetti, consentendo di sostituire il contenuto di questi pacchetti intervenendo nel traffico della build. server<\/a> (ad esempio, quando l'utente \u00e8 connesso a una rete wireless controllata dall'attaccante). <\/p>\n

In particolare, i pacchetti aufs e aufs-util venivano caricati tramite HTTP e non verificati tramite hash. Gli hash mancavano anche per i pacchetti riscv64-elf-toolchain, versal-firmware e mxsldr, che per impostazione predefinita venivano caricati tramite HTTPS, ma in caso di problemi tornavano al caricamento non crittografato dall'host http:\/\/sources.buildroot.net. In assenza di file '.hash', gli strumenti di Buildroot consideravano la verifica riuscita e gestivano i pacchetti scaricati, applicando anche le patch incluse nei pacchetti e avviando gli script di compilazione. Avendo la possibilit\u00e0 di sostituire i pacchetti scaricati, un attaccante poteva aggiungere le proprie patch o file di makefile, il che consentiva di apportare modifiche all'immagine risultante o agli script del sistema di compilazione e di eseguire il proprio codice. <\/p>\n

La sesta vulnerabilit\u00e0 (CVE-2023-43608) \u00e8 causata da un errore nell'implementazione della funzionalit\u00e0 BR_NO_CHECK_HASH_FOR, che consente di disattivare la verifica dell'integrit\u00e0 tramite hash per pacchetti selezionati. Alcuni pacchetti, come il kernel Linux, U-Boot e versal-firmware, consentivano il download delle ultime versioni per le quali non erano ancora stati generati hash di verifica. Per queste versioni veniva utilizzata l'opzione BR_NO_CHECK_HASH_FOR, disattivando la verifica tramite hash. I dati venivano scaricati tramite HTTPS, ma per impostazione predefinita, in caso di errore nel download, si tornava a contattare source.buildroot.net senza crittografia tramite il protocollo http:\/\/. Durante un attacco MITM, l'attaccante poteva bloccare la connessione al server HTTPS e quindi il download tornava su http:\/\/sources.buildroot.net.
\n
Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\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-novosti-interneta"],"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\udd47Vulnerabilit\u00e0 in Buildroot che consentono di eseguire codice sul server di build tramite attacco MITM | ProHoster","description":"Nel sistema di build Buildroot, progettato per generare ambienti Linux avviabili per sistemi embedded, sono state individuate sei vulnerabilit\u00e0 che consentono, durante l'intercettazione del traffico di transito (MITM), di apportare modifiche alle immagini di sistema generate o di eseguire codice a livello di sistema di build. Le vulnerabilit\u00e0 sono state risolte nelle versioni Buildroot 2023.02.8, 2023.08.4 e 2023.11. Le prime cinque vulnerabilit\u00e0 (CVE-2023-45841, CVE-2023-45842, CVE-2023-45838, CVE-2023-45839, CVE-2023-45840) riguardano","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/uyazvimosti-v-buildroot-pozvolyayushhie-cherez-mitm-ataku-vypolnit-kod-na-sborochnom-servere","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 Buildroot, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u0447\u0435\u0440\u0435\u0437 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\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) 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