{"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\/es\/blog\/news\/udalyonno-ekspluatiruemaya-uyazvimost-v-linux-drajvere-dlya-chipov-realtek","title":{"rendered":"Vulnerabilidad explotable de forma remota en el controlador de Linux para chips Realtek","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

En el controlador que forma parte del n\u00facleo de Linux rtlwifi<\/a><\/noindex> para adaptadores inal\u00e1mbricos con chips Realtek se ha detectado<\/a><\/noindex> una vulnerabilidad (CVE-2019-17666<\/a><\/noindex>), que puede ser potencialmente explotada para ejecutar c\u00f3digo en el contexto del n\u00facleo al enviar tramas especialmente formateadas.<\/p>\n

La vulnerabilidad es causada por un desbordamiento de b\u00fafer en el c\u00f3digo de implementaci\u00f3n del modo P2P (Wifi-Direct). Al analizar las tramas NoA<\/a><\/noindex> (Notificaci\u00f3n de Ausencia) no se verifica el tama\u00f1o de uno de los valores, lo que permite que los datos se escriban fuera del b\u00fafer y reemplacen la informaci\u00f3n en las estructuras del n\u00facleo que siguen al b\u00fafer.<\/p>\n

El ataque se puede llevar a cabo enviando tramas especialmente formateadas a un sistema con un adaptador de red Realtek activo que soporte la tecnolog\u00eda Wi-Fi Direct<\/a><\/noindex>, permitiendo que dos adaptadores inal\u00e1mbricos establezcan una conexi\u00f3n directa sin un punto de acceso. Para explotar el problema, no se requiere estar conectado a la red inal\u00e1mbrica del atacante, ni se requieren acciones del usuario, siendo suficiente estar en la zona de cobertura de la se\u00f1al inal\u00e1mbrica del atacante. <\/p>\n

El prototipo funcional del exploit actualmente se limita a provocar un fallo remoto del n\u00facleo, pero la vulnerabilidad potencialmente no excluye la posibilidad de ejecutar c\u00f3digo (esto es solo una suposici\u00f3n te\u00f3rica, ya que a\u00fan no hay un prototipo de exploit para la ejecuci\u00f3n de c\u00f3digo, pero el investigador que descubri\u00f3 el problema ya est\u00e1 trabajando<\/a><\/noindex> est\u00e1 trabajando en su creaci\u00f3n).<\/p>\n

El problema se manifiesta a partir del n\u00facleo 3.12<\/a><\/noindex> (seg\u00fan otros datos, el problema se manifiesta a partir del n\u00facleo 3.10<\/a><\/noindex>), lanzado en 2013. La soluci\u00f3n est\u00e1 disponible solo en forma de parche<\/a><\/noindex>. En las distribuciones, el problema permanece sin solucionar.
\nSe puede realizar un seguimiento de la correcci\u00f3n de vulnerabilidades en las distribuciones en las siguientes p\u00e1ginas: Debian<\/a><\/noindex>, SUSE\/openSUSE<\/a><\/noindex>, RHEL<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, Arch Linux<\/a><\/noindex>, Fedora<\/a><\/noindex>. Es probable que la vulnerabilidad tambi\u00e9n afecte afecta<\/a><\/noindex> y la plataforma Android.<\/p>\n

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

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

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[…]<\/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-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Vulnerabilidad remotamente explotable en el controlador de Linux para chips Realtek | ProHoster","description":"En el controlador que forma parte del n\u00facleo de Linux rtlwifi para adaptadores inal\u00e1mbricos con 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