{"id":39040,"date":"2019-10-31T22:27:31","date_gmt":"2019-10-31T19:27:31","guid":{"rendered":"https:\/\/prohoster.info\/blog\/udalyonno-ekspluatiruemaya-uyazvimost-v-linux-drajvere-dlya-chipov-realtek\/"},"modified":"2019-10-31T22:27:31","modified_gmt":"2019-10-31T19:27:31","slug":"udalyonno-ekspluatiruemaya-uyazvimost-v-linux-drajvere-dlya-chipov-realtek","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/udalyonno-ekspluatiruemaya-uyazvimost-v-linux-drajvere-dlya-chipov-realtek","title":{"rendered":"Vulnerabilit\u00e0 remota nel driver Linux per chip Realtek","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Nel driver incluso nel kernel Linux rtlwifi<\/a><\/noindex> per i modem wireless basati su chip Realtek \u00e8 stata rilevata<\/a><\/noindex> vulnerabilit\u00e0 (CVE-2019-17666<\/a><\/noindex>), che pu\u00f2 potenzialmente essere sfruttata per eseguire codice nel contesto del kernel inviando pacchetti appositamente formattati.<\/p>\n

La vulnerabilit\u00e0 \u00e8 causata da un overflow del buffer nel codice dell'implementazione della modalit\u00e0 P2P (Wifi-Direct). Durante l'analisi dei pacchetti NoA<\/a><\/noindex> (Notice of Absence), non viene effettuato un controllo della dimensione di uno dei valori, consentendo la scrittura di dati in un'area al di fuori del buffer e sovrascrivere le informazioni nelle strutture del kernel successive al buffer.<\/p>\n

L'attacco pu\u00f2 essere effettuato inviando pacchetti appositamente formattati a un sistema con un adattatore di rete attivo basato su chip Realtek che supporta Wi-Fi Direct<\/a><\/noindex>, che consente a due adattatori wireless di connettersi direttamente senza un punto di accesso. Non \u00e8 necessario connettersi alla rete wireless dell'attaccante e non ci sono azioni richieste da parte dell'utente; \u00e8 sufficiente che l'attaccante si trovi all'interno dell'area di copertura del segnale wireless. <\/p>\n

Il prototipo operativo dell'exploit \u00e8 attualmente limitato a una chiamata remota al crash del kernel, ma la vulnerabilit\u00e0 non esclude potenzialmente la possibilit\u00e0 di eseguire codice (questo \u00e8 solo un presupposto teorico, poich\u00e9 non esiste ancora un prototipo di exploit per l'esecuzione di codice; tuttavia, il ricercatore che ha rilevato il problema sta gi\u00e0 lavorando<\/a><\/noindex> alla sua creazione).<\/p>\n

Il problema si manifesta a partire dal kernel 3.12<\/a><\/noindex> (secondo altre fonti, il problema si manifesta a partire dal kernel 3.10<\/a><\/noindex>), rilasciato nel 2013. La correzione \u00e8 attualmente disponibile solo come patch<\/a><\/noindex>. Nei pacchetti distribuiti, il problema rimane non risolto.
\n\u00c8 possibile monitorare la risoluzione delle vulnerabilit\u00e0 nei pacchetti su queste pagine: Debian<\/a><\/noindex>, SUSE\/openSUSE<\/a><\/noindex>, RHEL<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, Arch Linux<\/a><\/noindex>, Fedora<\/a><\/noindex>. Probabilmente la vulnerabilit\u00e0 interessa anche la<\/a><\/noindex> piattaforma Android.<\/p>\n

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

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

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La vulnerabilit\u00e0 \u00e8 causata da un buffer overflow nel codice del modulo P2P (Wifi-Direct). Durante l'analisi dei pacchetti NoA (Notice of Absence) manca un controllo delle dimensioni.","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/udalyonno-ekspluatiruemaya-uyazvimost-v-linux-drajvere-dlya-chipov-realtek","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\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u0443\u0435\u043c\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 Linux-\u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0435 \u0434\u043b\u044f \u0447\u0438\u043f\u043e\u0432 Realtek | ProHoster","og:description":"\u0412\u043e \u0432\u0445\u043e\u0434\u044f\u0449\u0435\u043c \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u044f\u0434\u0440\u0430 Linux \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0435 rtlwifi \u0434\u043b\u044f \u0431\u0435\u0441\u043f\u0440\u043e\u0432\u043e\u0434\u043d\u044b\u0445 \u0430\u0434\u0430\u043f\u0442\u0435\u0440\u043e\u0432 \u043d\u0430 \u0447\u0438\u043f\u0430\u0445 Realtek \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2019-17666), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u0434\u043b\u044f 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