{"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\/hr\/blog\/news\/15-uyazvimostej-v-usb-drajverah-postavlyaemyh-v-yadre-linux","title":{"rendered":"15 ranjivosti u USB drajverima isporu\u010denim u Linux jezgru","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/xairy\">Andrej Konovalov<\/a><\/noindex> iz tvrtke Google  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/12\/03\/4\">je objavio<\/a><\/noindex> izvje\u0161\u0107e o otkrivanju novih 15 ranjivosti (CVE-2019-19523 \u2014 CVE-2019-19537) u USB upravlja\u010dima koji se nude u Linux jezgru. Ovo je tre\u0107a serija problema otkrivenih tijekom fuzzing testiranja USB stoga u paketu <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/google\/syzkaller\/blob\/master\/docs\/linux\/external_fuzzing_usb.md\">syzkaller<\/a><\/noindex> \u2014 ranije je ovaj istra\u017eiva\u010d <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=47523\">ve\u0107<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51333\">prijavio<\/a><\/noindex> o postojanju 29 ranjivosti. <\/p>\n<p>Ovaj put na popisu su uklju\u010dene samo ranjivosti uzrokovane pristupom ve\u0107 oslobo\u0111enim podru\u010djima memorije (use-after-free) ili koje dovode do curenja podataka iz memorije kernela. Problemi koji se mogu koristiti za odbijanje usluge nisu uklju\u010deni u izvje\u0161\u0107e. Ranjivosti se potencijalno mogu iskoristiti prilikom povezivanja posebno pripremljenih USB ure\u0111aja na ra\u010dunalo. Ispravci za sve navedene probleme u izvje\u0161\u0107u ve\u0107 su uklju\u010deni u kernel, ali neki koji nisu uklju\u010deni u izvje\u0161\u0107e <noindex><a rel=\"nofollow\" href=\"https:\/\/syzkaller.appspot.com\/upstream?manager=ci2-upstream-usb\">gre\u0161ke<\/a><\/noindex> ostaju neispravljeni.<\/p>\n<p>Najopasnije ranjivosti tipa \u00abuse-after-free\u00bb, koje mogu omogu\u0107iti izvr\u0161avanje napada\u010dkog koda, uklonjene su u upravlja\u010dima adutux, ff-memless, ieee802154, pn533, hiddev, iowarrior, mcba_usb i yurex. Pod CVE-2019-19532 dodatno je obuhva\u0107eno 14 ranjivosti u HID upravlja\u010dima, uzrokovanih gre\u0161kama koje dopu\u0161taju prepisivanje izvan granice bafer (out-of-bounds write). U upravlja\u010dima ttusb_dec, pcan_usb_fd i pcan_usb_pro prona\u0111eni su problemi koji dovode do curenja podataka iz memorije jezgre. U kodu USB stoga za rad s simboli\u010dkim ure\u0111ajima otkriven je problem (CVE-2019-19537), uzrokovan stanjem utrke (race condition).<\/p>\n<p>Tako\u0111er se mo\u017ee primijetiti<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/11\/22\/1\">otkrivanje<\/a><\/noindex> \u010detiri ranjivosti (CVE-2019-14895, CVE-2019-14896, CVE-2019-14897, CVE-2019-14901) u drajveru za be\u017ei\u010dne \u010dipove Marvell, koje mogu dovesti do prelivanja bafera. Napad se mo\u017ee izvesti daljinski slanjem odre\u0111eno oblikovanih okvira prilikom povezivanja s be\u017ei\u010dnom pristupnom to\u010dkom napada\u010da. Kao najvjerojatnija prijetnja ozna\u010dava se daljinsko odbijanje usluge (sru\u0161avanje kernela), ali nije isklju\u010dena ni mogu\u0107nost izvr\u0161enja koda u sustavu.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Izvor: <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 5.0.4 - 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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