{"id":113876,"date":"2024-02-26T22:02:49","date_gmt":"2024-02-26T20:02:49","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-yadre-linux-zatragivayushhie-ksmbd-ktls-uio-i-setevoj-stek"},"modified":"2024-02-26T22:02:49","modified_gmt":"2024-02-26T20:02:49","slug":"uyazvimosti-v-yadre-linux-zatragivayushhie-ksmbd-ktls-uio-i-setevoj-stek","status":"publish","type":"post","link":"https:\/\/prohoster.info\/es\/blog\/news\/uyazvimosti-v-yadre-linux-zatragivayushhie-ksmbd-ktls-uio-i-setevoj-stek","title":{"rendered":"Vulnerabilidades en el kernel de Linux que afectan a ksmbd, ktls, uio y la pila de red","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>En el m\u00f3dulo ksmbd, que ofrece una implementaci\u00f3n de servidor de archivos integrada en el n\u00facleo de Linux basada en el protocolo SMB, se han identificado dos vulnerabilidades que permiten, de forma remota y sin autentificaci\u00f3n, ejecutar c\u00f3digo con privilegios de n\u00facleo o determinar el contenido de la memoria del n\u00facleo en sistemas con el m\u00f3dulo ksmbd activado. Los problemas se presentan desde el n\u00facleo 5.15, que incluye el m\u00f3dulo ksmbd. Las vulnerabilidades han sido corregidas en las actualizaciones de los n\u00facleos 6.7.2, 6.6.14, 6.1.75 y 5.15.145. Se puede hacer seguimiento de las correcciones en las distribuciones en las siguientes p\u00e1ginas: Debian, Ubuntu, Gentoo, RHEL, SUSE, Fedora, Arch.     <\/p>\n<p>La primera vulnerabilidad (CVE-2024-26592) puede permitir la ejecuci\u00f3n de c\u00f3digo del atacante con privilegios de n\u00facleo al enviar solicitudes TCP no autenticadas debidamente a <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/es\/server\/dts-shicago\/\"   title=\"servidor\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2885\">servidor<\/a> ksmbd. La vulnerabilidad es causada por una organizaci\u00f3n incorrecta del bloqueo de objetos en el c\u00f3digo de establecimiento y interrupci\u00f3n de la conexi\u00f3n TCP a ksmbd, lo que permite crear condiciones para acceder a memoria ya liberada (use-after-free).       <\/p>\n<p>La segunda vulnerabilidad (CVE-2024-26594) provoca una fuga del contenido de la memoria del n\u00facleo al procesar un mech-token incorrecto en una solicitud de establecimiento de sesi\u00f3n enviada por el cliente. La vulnerabilidad es causada por un manejo inadecuado de los datos con el mech-token de SMB2 y resulta en la lectura de datos m\u00e1s all\u00e1 del b\u00fafer asignado.    <\/p>\n<p>Adem\u00e1s, se pueden se\u00f1alar algunas otras vulnerabilidades en el n\u00facleo de Linux:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2023-52439 &#8212; acceso a memoria ya liberada (use-after-free) en la funci\u00f3n uio_open del subsistema uio, que potencialmente permite a un usuario local ejecutar su c\u00f3digo con privilegios de n\u00facleo.\n<li class=\"l\"> CVE-2024-26582 &#8212; acceso a memoria ya liberada (use-after-free) en la implementaci\u00f3n de TLS a nivel de n\u00facleo (ktls), que potencialmente permite elevar sus privilegios durante las operaciones de descifrado.\n<li class=\"l\"> CVE-2024-0646 &#8212; escritura en un \u00e1rea de memoria fuera del b\u00fafer en el subsistema ktls debido a una manipulaci\u00f3n local espec\u00edfica del socket ktls usando la funci\u00f3n splice. La vulnerabilidad permite potencialmente elevar sus privilegios en el sistema.\n<li class=\"l\"> CVE-2023-6932 &#8212; condici\u00f3n de carrera en la implementaci\u00f3n del protocolo IGMP (Protocolo de Administraci\u00f3n de Grupos de Internet) en la pila IPv4, lo que conduce al acceso a memoria ya liberada (use-after-free). La vulnerabilidad permite potencialmente a un usuario local elevar sus privilegios en el sistema.\n<li class=\"l\"> CVE-2023-52435 &#8212; desbordamiento de MSS en la funci\u00f3n skb_segment() de la pila de red del n\u00facleo.\n<li class=\"l\"> CVE-2024-26601 &#8212; error en el c\u00f3digo de liberaci\u00f3n de bloques en el sistema de archivos ext4 que puede utilizarse para da\u00f1ar el mapa de bits buddy.\n<li class=\"l\"> CVE-2024-26598 &#8212; acceso a memoria ya liberada (use-after-free) en el hipervisor. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/es\/vps\/abuzoustojchivye-vps\/\"   title=\"KVM\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4386\">KVM<\/a>.        <\/ul>\n<p>Fuente: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60668\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 \u043c\u043e\u0434\u0443\u043b\u0435 ksmbd, \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e\u0449\u0435\u043c \u0432\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u0443\u044e \u0432 \u044f\u0434\u0440\u043e Linux \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u043d\u0430 \u0431\u0430\u0437\u0435 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 SMB, \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0431\u0435\u0437 \u043f\u0440\u043e\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0441\u0432\u043e\u0435\u0433\u043e \u043a\u043e\u0434\u0430 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 \u044f\u0434\u0440\u0430 \u0438\u043b\u0438 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u044c \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435 \u043f\u0430\u043c\u044f\u0442\u0438 \u044f\u0434\u0440\u0430 \u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u0441 \u0430\u043a\u0442\u0438\u0432\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u043c \u043c\u043e\u0434\u0443\u043b\u0435\u043c ksmbd. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u044e\u0442\u0441\u044f \u043d\u0430\u0447\u0438\u043d\u0430\u044f \u0441 \u044f\u0434\u0440\u0430 5.15, \u0432 \u0441\u043e\u0441\u0442\u0430\u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u0433\u043e \u0431\u044b\u043b \u043f\u0440\u0438\u043d\u044f\u0442 \u043c\u043e\u0434\u0443\u043b\u044c ksmbd. [&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-113876","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=\"\u0412 \u043c\u043e\u0434\u0443\u043b\u0435 ksmbd, \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e\u0449\u0435\u043c \u0432\u0441\u0442\u0440\u043e\u0435\u043d\u043d\u0443\u044e \u0432 \u044f\u0434\u0440\u043e Linux \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u043d\u0430 \u0431\u0430\u0437\u0435 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 SMB, 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