{"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\/de\/blog\/novosti-interneta\/udalyonno-ekspluatiruemaya-uyazvimost-v-linux-drajvere-dlya-chipov-realtek","title":{"rendered":"Remotely ausnutzbare Schwachstelle im Linux-Treiber f\u00fcr Realtek-Chips","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Im Linux-Kernel-Treiber <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/torvalds\/linux\/tree\/master\/drivers\/net\/wireless\/realtek\/rtlwifi\">rtlwifi<\/a><\/noindex> f\u00fcr drahtlose Adapter mit Realtek-Chips <noindex><a rel=\"nofollow\" href=\"https:\/\/twitter.com\/nicowaisman\/status\/1184864519316758535\">wurde<\/a><\/noindex> eine Schwachstelle (<noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2019-17666\">CVE-2019-17666<\/a><\/noindex>), die potenziell f\u00fcr die Ausf\u00fchrung von Code im Kernel-Kontext durch das Senden speziell gestalteter Pakete ausgenutzt werden kann.<\/p>\n<p>Die Schwachstelle wird durch einen Puffer\u00fcberlauf im Code f\u00fcr den P2P-Modus (Wifi-Direct) verursacht. Bei der Verarbeitung der Pakete <noindex><a rel=\"nofollow\" href=\"https:\/\/hsc.com\/DesktopModules\/DigArticle\/Print.aspx?PortalId=0&#038;ModuleId=1215&#038;Article=221\">NoA<\/a><\/noindex> (Notice of Absence) fehlt die \u00dcberpr\u00fcfung der Gr\u00f6\u00dfe eines der Werte, was zu einer \u00dcberschreibung von Daten in benachbarten Kernel-Strukturen f\u00fchrt.<\/p>\n<p>Ein Angriff kann durch das Senden speziell gestalteter Pakete an ein System mit aktivem Netzwerkadapter auf Basis des Realtek-Chips erfolgen, das die <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Wi-Fi_Direct\">Wi-Fi Direct<\/a><\/noindex>-Technologie unterst\u00fctzt, die es zwei drahtlosen Adaptern erm\u00f6glicht, sich direkt ohne einen Zugangspunkt zu verbinden. F\u00fcr die Ausnutzung des Problems ist keine Verbindung zum drahtlosen Netzwerk des Angreifers erforderlich, und der Benutzer muss keine Aktionen durchf\u00fchren; es gen\u00fcgt, dass sich der Angreifer im Bereich des drahtlosen Signals befindet. <\/p>\n<p>Der aktuelle Arbeitsprototyp des Exploits beschr\u00e4nkt sich auf einen Remote-Call des Kernel-Crashes, jedoch schlie\u00dft die potenzielle Verwundbarkeit nicht die M\u00f6glichkeit eines Code-Execs aus (dies ist bisher nur theoretisch, da es noch keinen Code-Exec-Prototyp gibt, aber der den Fehler entdeckte Forscher arbeitet bereits <noindex><a rel=\"nofollow\" href=\"https:\/\/arstechnica.com\/information-technology\/2019\/10\/unpatched-linux-flaw-may-let-attackers-crash-or-compromise-nearby-devices\/\">mit einem einzigen Thread arbeitet.<\/a><\/noindex> an dessen Erstellung).<\/p>\n<p>Das Problem tritt seit dem Kernel auf <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=38331\">3.12<\/a><\/noindex> (nach anderen Angaben tritt das Problem ab dem Kernel auf <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=37315\">3.10<\/a><\/noindex>). Dieser wurde 2013 ver\u00f6ffentlicht. Ein Patch ist vorl\u00e4ufig nur als <noindex><a rel=\"nofollow\" href=\"https:\/\/lkml.org\/lkml\/2019\/10\/16\/1226\">Patch<\/a><\/noindex>verf\u00fcgbar. In den Distributionen bleibt das Problem unbehoben.<br \/>\nEine \u00dcbersicht \u00fcber die Behebung von Sicherheitsl\u00fccken in den Distributionen findet man auf den folgenden Seiten: <noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2019-17666\">Debian<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/www.suse.com\/security\/cve\/CVE-2019-17666\/\">SUSE\/openSUSE<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.redhat.com\/show_bug.cgi?id=CVE-2019-17666\">RHEL<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/people.canonical.com\/~ubuntu-security\/cve\/2019\/CVE-2019-17666.html\">Ubuntu<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/security.archlinux.org\/CVE-2019-17666\">Arch Linux<\/a><\/noindex>, <noindex><a rel=\"nofollow\" href=\"https:\/\/bodhi.fedoraproject.org\/updates\/?releases=F30&#038;type=security\">, aber bisher ist er noch nicht in<\/a><\/noindex>. Die Verwundbarkeit betrifft wahrscheinlich auch <noindex><a rel=\"nofollow\" href=\"https:\/\/android.googlesource.com\/kernel\/tegra\/+\/refs\/tags\/android-8.1.0_r0.135\/drivers\/net\/wireless\/rtlwifi\/ps.c#750\">Bluetooth-Stack und h\u00e4ngt mit der fehlerhaften Verarbeitung der Berechtigung BLUETOOTH_PRIVILEGED bei setPhonebookAccessPermission zusammen. Bei den als gef\u00e4hrlich eingestuften Schwachstellen wurden 7 Probleme in Frameworks und Anwendungen, 4 in Systemkomponenten, 2 im Kernel und 10 in offenen und propriet\u00e4ren Komponenten f\u00fcr Qualcomm-Chips behoben.<\/a><\/noindex> die Android-Plattform.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Quelle: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51700\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\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 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043a\u043e\u0434\u0430 \u0432 \u043a\u043e\u043d\u0442\u0435\u043a\u0441\u0442\u0435 \u044f\u0434\u0440\u0430 \u043f\u0440\u0438 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u043a\u0430\u0434\u0440\u043e\u0432. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435\u043c \u0431\u0443\u0444\u0435\u0440\u0430 \u0432 \u043a\u043e\u0434\u0435 \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u0440\u0435\u0436\u0438\u043c\u0430 P2P (Wifi-Direct). \u041f\u0440\u0438 \u0440\u0430\u0437\u0431\u043e\u0440\u0435 \u043a\u0430\u0434\u0440\u043e\u0432 NoA (Notice of Absence) \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0430 \u0440\u0430\u0437\u043c\u0435\u0440\u0430 [&hellip;]<\/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-39040","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- 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Die Schwachstelle resultiert aus einem Puffer\u00fcberlauf im Code f\u00fcr den P2P-Modus (Wifi-Direct). Beim Parsen von NoA-Paketen (Notice of Absence) fehlt eine Gr\u00f6\u00dfensicherung.","canonical_url":"https:\/\/prohoster.info\/de\/blog\/novosti-interneta\/udalyonno-ekspluatiruemaya-uyazvimost-v-linux-drajvere-dlya-chipov-realtek","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"de_DE","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 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