I ricercatori delle aziende Claroty e JFrog hanno pubblicato i risultati di un audit di sicurezza del pacchetto BusyBox, ampiamente utilizzato nei dispositivi embedded e che offre un insieme di utility UNIX standard, confezionate in un unico file eseguibile. Durante il controllo sono state individuate 14 vulnerabilit\u00e0, gi\u00e0 risolte nella versione di agosto del BusyBox 1.34. Quasi tutti i problemi sono considerati non pericolosi e discutibili in termini di applicazione in attacchi reali, poich\u00e9 richiedono l'esecuzione delle utility con argomenti forniti esternamente. <\/p>\n
Si segnala particolarmente la vulnerabilit\u00e0 CVE-2021-42374, che consente di causare un'interruzione del servizio durante l'elaborazione di un file compresso strutturato in modo specifico da parte dell'utility unlzma, e nel caso di una compilazione con l'opzione CONFIG_FEATURE_SEAMLESS_LZMA, anche da qualsiasi altro componente di BusyBox, inclusi tar, unzip, rpm, dpkg, lzma e man. <\/p>\n
Le vulnerabilit\u00e0 CVE-2021-42373, CVE-2021-42375, CVE-2021-42376 e CVE-2021-42377 permettono di causare un'interruzione del servizio, ma richiedono l'esecuzione delle utility man, ash e hush con parametri forniti dall'attaccante. Le vulnerabilit\u00e0 da CVE-2021-42378 a CVE-2021-42386 riguardano l'utility awk e potrebbero portare all'esecuzione di codice, ma per questo l'attaccante deve riuscire ad eseguire in awk un determinato pattern (\u00e8 necessario avviare awk passando come primo argomento della riga di comando dati ricevuti dall'attaccante). <\/p>\n
Inoltre, si segnala una vulnerabilit\u00e0 (CVE-2021-43523) nelle librerie uclibc e uclibc-ng, relativa al fatto che durante l'accesso alle funzioni gethostbyname(), getaddrinfo(), gethostbyaddr() e getnameinfo() non viene eseguita la verifica e la pulizia del nome di dominio restituito dal server DNS. Ad esempio, in risposta a una certa richiesta di risoluzione, un server DNS controllato da un attaccante potrebbe restituire host del tipo «<script>alert(‘xss’)<\\\/script>.attacker.com» e questi verranno restituiti senza modifiche a un programma che, senza pulizia, potrebbe visualizzarli nella sua interfaccia web. Il problema \u00e8 stato risolto nella versione uclibc-ng 1.0.39 tramite l'aggiunta di codice per verificare la correttezza dei valori restituiti. nomi di dominio<\/a>, realizzato in analogia con Glibc. \u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0439 Claroty \u0438 JFrog \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0438 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0430\u0443\u0434\u0438\u0442\u0430 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 BusyBox, \u0448\u0438\u0440\u043e\u043a\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c\u043e\u0433\u043e \u0432\u043e \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u043c\u044b\u0445 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430\u0445 \u0438 \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e\u0449\u0435\u0433\u043e \u043d\u0430\u0431\u043e\u0440 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u044b\u0445 \u0443\u0442\u0438\u043b\u0438\u0442 UNIX, \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0432 \u0432\u0438\u0434\u0435 \u0435\u0434\u0438\u043d\u043e\u0433\u043e \u0438\u0441\u043f\u043e\u043b\u043d\u044f\u0435\u043c\u043e\u0433\u043e \u0444\u0430\u0439\u043b\u0430. \u0412 \u0445\u043e\u0434\u0435 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043e 14 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0443\u0436\u0435 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0432 \u0430\u0432\u0433\u0443\u0441\u0442\u043e\u0432\u0441\u043a\u043e\u043c \u0432\u044b\u043f\u0443\u0441\u043a\u0435 BusyBox 1.34. \u041f\u043e\u0447\u0442\u0438 \u0432\u0441\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043d\u0435\u043e\u043f\u0430\u0441\u043d\u044b \u0438 \u0441\u043e\u043c\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b \u0441 \u0442\u043e\u0447\u043a\u0438 \u0437\u0440\u0435\u043d\u0438\u044f \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432 \u0440\u0435\u0430\u043b\u044c\u043d\u044b\u0445 […]<\/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-102257","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\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\udd47L'analisi di sicurezza del pacchetto BusyBox ha rivelato 14 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Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"