{"id":104724,"date":"2022-07-28T15:36:38","date_gmt":"2022-07-28T13:36:38","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-samba-pozvolyayushhaya-pomenyat-parol-lyubomu-polzovatelyu"},"modified":"2022-07-28T15:36:38","modified_gmt":"2022-07-28T13:36:38","slug":"uyazvimost-v-samba-pozvolyayushhaya-pomenyat-parol-lyubomu-polzovatelyu","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/uyazvimost-v-samba-pozvolyayushhaya-pomenyat-parol-lyubomu-polzovatelyu","title":{"rendered":"Vulnerabilidad en Samba que permite cambiar la contrase\u00f1a a cualquier usuario","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Se han publicado versiones corregidas de Samba 4.16.4, 4.15.9 y 4.14.14 que resuelven 5 vulnerabilidades. Se puede seguir la publicaci\u00f3n de actualizaciones del paquete en las p\u00e1ginas: Debian, Ubuntu, RHEL, SUSE, Arch, FreeBSD.    <\/p>\n<p>La vulnerabilidad m\u00e1s peligrosa (CVE-2022-32744) permite a los usuarios del dominio Active Directory cambiar la contrase\u00f1a de cualquier usuario, incluida la del administrador, lo que les da control total sobre el dominio. El problema es causado porque el KDC acepta solicitudes kpasswd cifradas con cualquier clave conocida.     <\/p>\n<p>Un atacante con acceso a  <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/es\/domain\/\"   title=\"el dominio\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1234\">el dominio<\/a>, puede enviar una solicitud ficticia para restablecer la contrase\u00f1a en nombre de otro usuario, cifr\u00e1ndola con su clave, y el KDC la procesar\u00e1 sin verificar la correspondencia de la clave de la cuenta. Para enviar solicitudes ficticias tambi\u00e9n se pueden utilizar las claves de los controladores de dominio que funcionan solo en modo de solo lectura (RODC), que no tienen autoridad para cambiar contrase\u00f1as. Como una forma de protecci\u00f3n alternativa, se puede deshabilitar el soporte del protocolo kpasswd a\u00f1adiendo en smb.conf la l\u00ednea 'kpasswd port = 0'.    <\/p>\n<p>Otras vulnerabilidades:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2022-32746 \u2014 los usuarios de Active Directory pueden iniciar una referencia a la memoria despu\u00e9s de su liberaci\u00f3n (use-after-free) en el proceso del servidor al enviar consultas LDAP cuidadosamente dise\u00f1adas 'add' o 'modify'. El problema se debe a que el m\u00f3dulo de registro de auditor\u00eda accede al contenido del mensaje LDAP despu\u00e9s de que el m\u00f3dulo de base de datos libera la memoria asignada a dicho mensaje. Para llevar a cabo el ataque, se requieren derechos para agregar o modificar ciertos atributos privilegiados, como userAccountControl.\n<li class=\"l\"> CVE-2022-2031 \u2014 los usuarios de Active Directory pueden eludir ciertas restricciones en el controlador de dominio. El KDC y el servicio kpasswd pueden descifrar los tickets entre s\u00ed, ya que comparten un conjunto de claves y cuentas. Por lo tanto, un usuario que solicite un cambio de contrase\u00f1a puede usar el ticket obtenido para acceder a otros servicios.\n<li class=\"l\"> CVE-2022-32745 \u2014 los usuarios de Active Directory pueden provocar el cierre inesperado del proceso del servidor al enviar solicitudes LDAP 'add' o 'modify', que conducen a un acceso a datos no inicializados.\n<li class=\"l\"> CVE-2022-32742 \u2014 fuga de informaci\u00f3n sobre el contenido de la memoria <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=\"3841\">servidores<\/a> a trav\u00e9s de manipulaciones con el protocolo SMB1. Un cliente SMB1, que tiene permiso para escribir en el almacenamiento compartido, puede crear condiciones para escribir fragmentos del contenido de la memoria del proceso del servidor en un archivo o enviarlo a una impresora. El ataque se realiza mediante el env\u00edo de una solicitud 'write' con un rango incorrecto especificado. Este problema afecta solo a las versiones de Samba anteriores a la 4.11 (en la versi\u00f3n 4.11, el soporte para SMB1 est\u00e1 deshabilitado de manera predeterminada).                 <\/ul>\n<p>Fuente: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=57565\">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 4.16.4, 4.15.9 \u0438 4.14.14 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c 5 \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, RHEL, SUSE, Arch, FreeBSD. \u041d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u043e\u043f\u0430\u0441\u043d\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2022-32744) \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f\u043c \u0434\u043e\u043c\u0435\u043d\u0430 Active Directory \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u043f\u0430\u0440\u043e\u043b\u044c \u043b\u044e\u0431\u043e\u0433\u043e \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f, \u0432 \u0442\u043e\u043c \u0447\u0438\u0441\u043b\u0435 \u043c\u043e\u0436\u043d\u043e \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u043f\u0430\u0440\u043e\u043b\u044c \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u0430 \u0438 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u043e\u043b\u043d\u044b\u0439 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044c \u043d\u0430\u0434 \u0434\u043e\u043c\u0435\u043d\u043e\u043c. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 [&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-104724","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 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