{"id":105381,"date":"2022-10-25T21:36:42","date_gmt":"2022-10-25T19:36:42","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-samba-privodyashhie-k-perepolneniyu-bufera-i-vyhodu-za-graniczu-bazovogo-kataloga"},"modified":"2022-10-25T21:36:42","modified_gmt":"2022-10-25T19:36:42","slug":"uyazvimosti-v-samba-privodyashhie-k-perepolneniyu-bufera-i-vyhodu-za-graniczu-bazovogo-kataloga","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/uyazvimosti-v-samba-privodyashhie-k-perepolneniyu-bufera-i-vyhodu-za-graniczu-bazovogo-kataloga","title":{"rendered":"Vulnerabilidades en Samba que conducen a desbordamientos de b\u00fafer y salida del directorio base.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Se han publicado versiones corregidas de los paquetes Samba 4.17.2, 4.16.6 y 4.15.11 que abordan dos vulnerabilidades. Los lanzamientos de actualizaciones de los paquetes en las distribuciones pueden seguirse en p\u00e1ginas como: Debian, Ubuntu, Gentoo, RHEL, SUSE, Arch, FreeBSD.    <\/p>\n<ul>\n<li class=\"l\"> CVE-2022-3437 \u2014 desbordamiento de b\u00fafer en las funciones unwrap_des() y unwrap_des3(), proporcionadas en la biblioteca GSSAPI del paquete Heimdal (incluido en Samba desde la versi\u00f3n 4.0). La explotaci\u00f3n de la vulnerabilidad es posible mediante el env\u00edo de un paquete especialmente dise\u00f1ado a sistemas que utilizan GSSAPI. Por ejemplo, el problema se manifiesta en la implementaci\u00f3n del cliente y del sistema de archivos <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/es\/server\/dts-los-angeles\/\"   title=\"servidores\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3866\">servidores<\/a> basado en el protocolo SMB1, al aplicar DCE\/RPC y en el controlador de dominio de Active Directory. Los sistemas compilados con MIT Kerberos (\u2014with-system-mitkrb5) no son vulnerables al problema.\n<li class=\"l\"> CVE-2022-3592 \u2014 posibilidad de salir de los l\u00edmites del directorio exportado y acceder a cualquier archivo en <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/es\/server\/dts-newyork\/\"   title=\"servidor\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2728\">servidor<\/a> a trav\u00e9s de manipulaciones con enlaces simb\u00f3licos. El problema se manifiesta solo en la rama Samba 4.17 y es causado por un error en el nuevo c\u00f3digo para manejar enlaces simb\u00f3licos en el espacio de usuario (en el c\u00f3digo faltaba una verificaci\u00f3n para asegurar que el directorio objetivo del enlace estuviera dentro del directorio exportado). La vulnerabilidad puede ser explotada por un cliente con acceso de escritura en la secci\u00f3n exportada, proporcionada a trav\u00e9s de los protocolos SMB1 o NFS, que permiten crear enlaces simb\u00f3licos.    <\/ul>\n<p>Fuente: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=57978\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 Samba 4.17.2, 4.16.6 \u0438 4.15.11 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0434\u0432\u0443\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439. \u0412\u044b\u043f\u0443\u0441\u043a \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0439 \u043f\u0430\u043a\u0435\u0442\u043e\u0432 \u0432 \u0434\u0438\u0441\u0442\u0440\u0438\u0431\u0443\u0442\u0438\u0432\u0430\u0445 \u043c\u043e\u0436\u043d\u043e \u043f\u0440\u043e\u0441\u043b\u0435\u0434\u0438\u0442\u044c \u043d\u0430 \u0441\u0442\u0440\u0430\u043d\u0438\u0446\u0430\u0445: Debian, Ubuntu, Gentoo, RHEL, SUSE, Arch, FreeBSD. CVE-2022-3437 &#8212; \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0431\u0443\u0444\u0435\u0440\u0430 \u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u044f\u0445 unwrap_des() \u0438 unwrap_des3(), \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u043c\u044b\u0445 \u0432 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0435 GSSAPI \u0438\u0437 \u043f\u0430\u043a\u0435\u0442\u0430 Heimdal (\u043f\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432 \u0441\u043e\u0441\u0442\u0430\u0432\u0435 Samba, \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u0432\u0435\u0440\u0441\u0438\u0438 4.0). \u042d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 [&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-105381","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\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 Samba 4.17.2, 4.16.6 \u0438 4.15.11 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0434\u0432\u0443\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439.\" \/>\n\t<meta name=\"robots\" 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\u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0438\u0435 \u043a \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u0431\u0443\u0444\u0435\u0440\u0430 \u0438 \u0432\u044b\u0445\u043e\u0434\u0443 \u0437\u0430 \u0433\u0440\u0430\u043d\u0438\u0446\u0443 \u0431\u0430\u0437\u043e\u0432\u043e\u0433\u043e \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0430 | ProHoster","og:description":"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 \u043f\u0430\u043a\u0435\u0442\u0430 Samba 4.17.2, 4.16.6 \u0438 4.15.11 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0434\u0432\u0443\u0445 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