{"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\/pt\/blog\/news\/15-uyazvimostej-v-usb-drajverah-postavlyaemyh-v-yadre-linux","title":{"rendered":"15 vulnerabilidades em drivers USB fornecidos no kernel Linux","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/xairy\">Andrey Konovalov<\/a><\/noindex> da empresa Google  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/12\/03\/4\">publicou<\/a><\/noindex> relat\u00f3rio sobre a identifica\u00e7\u00e3o de 15 novas vulnerabilidades (CVE-2019-19523 \u2014 CVE-2019-19537) nos drivers USB oferecidos no kernel Linux. Esta \u00e9 a terceira rodada de problemas encontrados durante a realiza\u00e7\u00e3o de testes de fuzzing na pilha USB do pacote. <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/google\/syzkaller\/blob\/master\/docs\/linux\/external_fuzzing_usb.md\">syzkaller<\/a><\/noindex> \u2014 anteriormente este pesquisador <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=47523\">j\u00e1<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51333\">informou<\/a><\/noindex> sobre a presen\u00e7a de 29 vulnerabilidades. <\/p>\n<p>Desta vez, a lista inclui apenas vulnerabilidades causadas pelo acesso a \u00e1reas de mem\u00f3ria j\u00e1 liberadas (use-after-free) ou que levam ao vazamento de dados da mem\u00f3ria do n\u00facleo. Problemas que podem ser usados para nega\u00e7\u00e3o de servi\u00e7o n\u00e3o est\u00e3o inclu\u00eddos no relat\u00f3rio. As vulnerabilidades podem ser potencialmente exploradas ao conectar dispositivos USB especialmente preparados a um computador. Corre\u00e7\u00f5es para todos os problemas mencionados no relat\u00f3rio j\u00e1 foram inclu\u00eddas no n\u00facleo, mas algumas que n\u00e3o foram relatadas <noindex><a rel=\"nofollow\" href=\"https:\/\/syzkaller.appspot.com\/upstream?manager=ci2-upstream-usb\">um erro<\/a><\/noindex> ainda permanecem n\u00e3o corrigidas.<\/p>\n<p>As vulnerabilidades mais perigosas do tipo \"use-after-free\", que podem levar \u00e0 execu\u00e7\u00e3o de c\u00f3digo malicioso, foram corrigidas nos drivers adutux, ff-memless, ieee802154, pn533, hiddev, iowarrior, mcba_usb e yurex. Sob a CVE-2019-19532, 14 vulnerabilidades adicionais nos drivers HID causadas por erros que permitem grava\u00e7\u00e3o fora dos limites do buffer (out-of-bounds write) foram abordadas. Nos drivers ttusb_dec, pcan_usb_fd e pcan_usb_pro, problemas foram encontrados que levam ao vazamento de dados da mem\u00f3ria do kernel. No c\u00f3digo da pilha USB para dispositivos de caracteres, foi identificada uma vulnerabilidade (CVE-2019-19537), causada por uma condi\u00e7\u00e3o de corrida (race condition).<\/p>\n<p>Tamb\u00e9m pode ser destacado<br \/>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/www.openwall.com\/lists\/oss-security\/2019\/11\/22\/1\">de uma vulnerabilidade<\/a><\/noindex> quatro vulnerabilidades (CVE-2019-14895, CVE-2019-14896, CVE-2019-14897, CVE-2019-14901) no driver para chips sem fio Marvell, que podem levar a um estouro de buffer. Um ataque pode ser realizado remotamente atrav\u00e9s do envio de quadros especificamente formatados ao se conectar a um ponto de acesso sem fio controlado por um invasor. A nega\u00e7\u00e3o de servi\u00e7o remota (falha do n\u00facleo) \u00e9 considerada a amea\u00e7a mais prov\u00e1vel, mas n\u00e3o se descarta a possibilidade de execu\u00e7\u00e3o de c\u00f3digo no sistema.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <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 5.0.3 - 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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