{"id":105776,"date":"2022-12-01T15:37:11","date_gmt":"2022-12-01T13:37:11","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/udalyonno-ekspluatiruemaya-root-uyazvimost-v-utilite-ping-postavlyaemoj-vo-freebsd"},"modified":"2022-12-01T15:37:11","modified_gmt":"2022-12-01T13:37:11","slug":"udalyonno-ekspluatiruemaya-root-uyazvimost-v-utilite-ping-postavlyaemoj-vo-freebsd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/udalyonno-ekspluatiruemaya-root-uyazvimost-v-utilite-ping-postavlyaemoj-vo-freebsd","title":{"rendered":"Vulnerabilidad de root explotable de forma remota en la utilidad ping, incluida en FreeBSD","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Se ha identificado una vulnerabilidad en FreeBSD (CVE-2022-23093) en la utilidad ping incluida en la entrega b\u00e1sica. El problema puede llevar potencialmente a la ejecuci\u00f3n remota de c\u00f3digo con privilegios de root al verificar mediante ping un host externo controlado por un atacante. La soluci\u00f3n se ha propuesto en las actualizaciones FreeBSD 13.1-RELEASE-p5, 12.4-RC2-p2 y 12.3-RELEASE-p10. No est\u00e1 claro si otros sistemas BSD son vulnerables a esta problem\u00e1tica (no ha habido informes sobre vulnerabilidades en NetBSD, DragonFlyBSD y OpenBSD).      <\/p>\n<p>La vulnerabilidad es causada por un desbordamiento de b\u00fafer en el c\u00f3digo de an\u00e1lisis de mensajes ICMP que llegan como respuesta a las solicitudes de verificaci\u00f3n. El c\u00f3digo para enviar y recibir mensajes ICMP en ping utiliza sockets raw y se ejecuta con privilegios elevados (la utilidad se entrega con el flag setuid root). El procesamiento de la respuesta se realiza en ping a trav\u00e9s de la reconstrucci\u00f3n de los encabezados IP e ICMP de los paquetes que se reciben del socket raw. Los encabezados IP e ICMP asignados se copian en los b\u00faferes por la funci\u00f3n pr_pack() sin tener en cuenta que en el paquete, despu\u00e9s del encabezado IP, pueden existir encabezados extendidos adicionales.     <\/p>\n<p>Dichos encabezados se extraen del paquete e incluyen en el bloque de encabezados, pero no se consideran al calcular el tama\u00f1o del b\u00fafer. Si el host devuelve un paquete con encabezados adicionales como respuesta a la solicitud ICMP enviada, su contenido se escribir\u00e1 en un \u00e1rea fuera del b\u00fafer en la pila. Como resultado, el atacante puede sobrescribir hasta 40 bytes de datos en la pila, lo que potencialmente permite la ejecuci\u00f3n de su propio c\u00f3digo. La gravedad del problema se mitiga porque en el momento de la manifestaci\u00f3n del error, el proceso se encuentra en un estado de aislamiento de llamadas del sistema (modo de capacidades), lo que dificulta el acceso al resto del sistema tras la explotaci\u00f3n de la vulnerabilidad.<br \/>\n<br \/>Fuente: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=58232\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u043e FreeBSD \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-23093) \u0432 \u0443\u0442\u0438\u043b\u0438\u0442\u0435 ping, \u0432\u0445\u043e\u0434\u044f\u0449\u0435\u0439 \u0432 \u0431\u0430\u0437\u043e\u0432\u0443\u044e \u043f\u043e\u0441\u0442\u0430\u0432\u043a\u0443. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u043c\u0443 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u043a\u043e\u0434\u0430 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root \u043f\u0440\u0438 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0435 \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 ping \u0432\u043d\u0435\u0448\u043d\u0435\u0433\u043e \u0445\u043e\u0441\u0442\u0430, \u043f\u043e\u0434\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c\u043d\u043e\u0433\u043e \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u0443. \u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043e \u0432 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f\u0445 FreeBSD 13.1-RELEASE-p5, 12.4-RC2-p2 \u0438 12.3-RELEASE-p10. \u041f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u044b \u043b\u0438 \u0434\u0440\u0443\u0433\u0438\u0435 BSD-\u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u043e\u043a\u0430 \u043d\u0435 \u044f\u0441\u043d\u043e (\u043e\u0442\u0447\u0451\u0442\u043e\u0432 \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 NetBSD, [&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-105776","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2 - aioseo.com -->\n\t<meta name=\"description\" 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