{"id":53560,"date":"2019-12-04T00:00:00","date_gmt":"2019-12-03T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/15-uyazvimostej-v-usb-drajverah-postavlyaemyh-v-yadre-linux"},"modified":"2020-02-18T14:01:28","modified_gmt":"2020-02-18T11:01:28","slug":"15-uyazvimostej-v-usb-drajverah-postavlyaemyh-v-yadre-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/15-uyazvimostej-v-usb-drajverah-postavlyaemyh-v-yadre-linux","title":{"rendered":"15 luk w zabezpieczeniach w sterownikach USB dostarczanych z j\u0105drami Linux","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/xairy\">Andrzej Konowalow<\/a><\/noindex> z firmy Google  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/12\/03\/4\">opublikowa\u0142<\/a><\/noindex> raport o wykryciu kolejnych 15 luk bezpiecze\u0144stwa (CVE-2019-19523 \u2014 CVE-2019-19537) w sterownikach USB oferowanych w j\u0105drze Linux. To trzecia ods\u0142ona problem\u00f3w znalezionych podczas test\u00f3w fuzzingowych stosu USB w pakiecie <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/google\/syzkaller\/blob\/master\/docs\/linux\/external_fuzzing_usb.md\">syzkaller<\/a><\/noindex> \u2014 wcze\u015bniej ten badacz <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=47523\">ju\u017c<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51333\">raportowa\u0142<\/a><\/noindex> o 29 podatno\u015bciach. <\/p>\n<p>Tym razem na li\u015bcie znalaz\u0142y si\u0119 jedynie podatno\u015bci spowodowane dost\u0119pem do ju\u017c zwolnionych obszar\u00f3w pami\u0119ci (use-after-free) lub prowadz\u0105ce do wycieku danych z pami\u0119ci j\u0105dra. Problemy, kt\u00f3re mog\u0105 by\u0107 wykorzystane do odmowy us\u0142ugi, nie zosta\u0142y uwzgl\u0119dnione w raporcie. Podatno\u015bci mog\u0105 potencjalnie by\u0107 wykorzystywane przy pod\u0142\u0105czeniu do komputera specjalnie przygotowanych urz\u0105dze\u0144 USB. Poprawki dla wszystkich wymienionych w raporcie problem\u00f3w ju\u017c zosta\u0142y w\u0142\u0105czone do j\u0105dra, ale niekt\u00f3re nieuj\u0119te w raporcie <noindex><a rel=\"nofollow\" href=\"https:\/\/syzkaller.appspot.com\/upstream?manager=ci2-upstream-usb\">b\u0142\u0119du<\/a><\/noindex> nadal pozostaj\u0105 nierozwi\u0105zane.<\/p>\n<p>Najbardziej niebezpieczne podatno\u015bci typu \u201euse-after-free\u201d, kt\u00f3re mog\u0105 prowadzi\u0107 do wykonania kodu atakuj\u0105cego, zosta\u0142y usuni\u0119te w sterownikach adutux, ff-memless, ieee802154, pn533, hiddev, iowarrior, mcba_usb i yurex. W CVE-2019-19532 dodatkowo zg\u0142oszono 14 luk w sterownikach HID, spowodowanych b\u0142\u0119dami dopuszczaj\u0105cymi zapis poza granice bufora (out-of-bounds write). W sterownikach ttusb_dec, pcan_usb_fd i pcan_usb_pro znaleziono problemy prowadz\u0105ce do wycieku danych z pami\u0119ci j\u0105dra. W kodzie stosu USB obs\u0142uguj\u0105cym urz\u0105dzenia znakowe ujawniono problem (CVE-2019-19537), spowodowany stanem wy\u015bcigu (race condition).<\/p>\n<p>Mo\u017cna r\u00f3wnie\u017c zauwa\u017cy\u0107<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/11\/22\/1\">identyfikacja<\/a><\/noindex> czterech podatno\u015bci (CVE-2019-14895, CVE-2019-14896, CVE-2019-14897, CVE-2019-14901) w sterowniku dla bezprzewodowych chip\u00f3w Marvell, kt\u00f3re mog\u0105 prowadzi\u0107 do przepe\u0142nienia bufora. Atak mo\u017ce by\u0107 przeprowadzony zdalnie poprzez wys\u0142anie odpowiednio sformatowanych ramek podczas \u0142\u0105czenia si\u0119 z bezprzewodowym punktem dost\u0119powym sprawcy. Jako najbardziej prawdopodobne zagro\u017cenie wskazuje si\u0119 zdaln\u0105 odmow\u0119 us\u0142ugi (awaria j\u0105dra), ale nie wyklucza si\u0119 te\u017c mo\u017cliwo\u015bci wykonania kodu w systemie.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>\u0179r\u00f3d\u0142o: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51974\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0410\u043d\u0434\u0440\u0435\u0439 \u041a\u043e\u043d\u043e\u0432\u0430\u043b\u043e\u0432 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Google \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b \u043e\u0442\u0447\u0451\u0442 \u043e \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0438\u0438 \u043e\u0447\u0435\u0440\u0435\u0434\u043d\u044b\u0445 15 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 (CVE-2019-19523 &#8212; CVE-2019-19537) \u0432 USB-\u0434\u0440\u0430\u0439\u0432\u0435\u0440\u0430\u0445, \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u0435\u043c\u044b\u0445 \u0432 \u044f\u0434\u0440\u0435 Linux. \u042d\u0442\u043e \u0442\u0440\u0435\u0442\u044c\u044f \u043f\u043e\u0440\u0446\u0438\u044f \u043f\u0440\u043e\u0431\u043b\u0435\u043c, \u043d\u0430\u0439\u0434\u0435\u043d\u043d\u044b\u0445 \u043f\u0440\u0438 \u043f\u0440\u043e\u0432\u0435\u0434\u0435\u043d\u0438\u0438 fuzzing-\u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f USB-\u0441\u0442\u0435\u043a\u0430 \u0432 \u043f\u0430\u043a\u0435\u0442\u0435 syzkaller &#8212; \u0440\u0430\u043d\u0435\u0435 \u0434\u0430\u043d\u043d\u044b\u0439 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u0443\u0436\u0435 \u0441\u043e\u043e\u0431\u0449\u0430\u043b \u043e \u043d\u0430\u043b\u0438\u0447\u0438\u0438 29 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439. \u041d\u0430 \u044d\u0442\u043e\u0442 \u0440\u0430\u0437 \u0432 \u0441\u043f\u0438\u0441\u043a\u0435 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u044b \u0442\u043e\u043b\u044c\u043a\u043e \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u0432\u044b\u0437\u0432\u0430\u043d\u043d\u044b\u0435 \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0435\u043c \u043a \u0443\u0436\u0435 [&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-53560","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0410\u043d\u0434\u0440\u0435\u0439 \u041a\u043e\u043d\u043e\u0432\u0430\u043b\u043e\u0432 \u0438\u0437 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