{"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\/pt\/blog\/news\/uyazvimosti-v-yadre-linux-zatragivayushhie-ksmbd-ktls-uio-i-setevoj-stek","title":{"rendered":"Vulnerabilidades no n\u00facleo do Linux afetando ksmbd, ktls, uio e na pilha de rede.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>No m\u00f3dulo ksmbd, que oferece uma implementa\u00e7\u00e3o de servidor de arquivos baseada no protocolo SMB integrada ao n\u00facleo do Linux, foram identificadas duas vulnerabilidades que permitem a execu\u00e7\u00e3o remota de c\u00f3digo com privil\u00e9gios de n\u00facleo ou a revela\u00e7\u00e3o do conte\u00fado da mem\u00f3ria do n\u00facleo em sistemas com o m\u00f3dulo ksmbd ativado, sem passar pela autentica\u00e7\u00e3o. Os problemas surgem a partir do n\u00facleo 5.15, que incorporou o m\u00f3dulo ksmbd. As vulnerabilidades foram corrigidas nas atualiza\u00e7\u00f5es do n\u00facleo 6.7.2, 6.6.14, 6.1.75 e 5.15.145. \u00c9 poss\u00edvel acompanhar a corre\u00e7\u00e3o nas distribui\u00e7\u00f5es nas seguintes p\u00e1ginas: Debian, Ubuntu, Gentoo, RHEL, SUSE, Fedora, Arch.     <\/p>\n<p>A primeira vulnerabilidade (CVE-2024-26592) pode levar \u00e0 execu\u00e7\u00e3o de c\u00f3digo do atacante com privil\u00e9gios de n\u00facleo ao enviar requisi\u00e7\u00f5es TCP especialmente formatadas e n\u00e3o autenticadas para <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/server\/dts-shicago\/\"   title=\"servidor\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2885\">servidor<\/a> ksmbd. A vulnerabilidade \u00e9 causada pela organiza\u00e7\u00e3o incorreta do bloqueio de objetos no c\u00f3digo de instala\u00e7\u00e3o e interrup\u00e7\u00e3o da conex\u00e3o TCP com ksmbd, permitindo a cria\u00e7\u00e3o de condi\u00e7\u00f5es para o acesso \u00e0 mem\u00f3ria j\u00e1 liberada (use-after-free).       <\/p>\n<p>A segunda vulnerabilidade (CVE-2024-26594) resulta em um vazamento de conte\u00fado da mem\u00f3ria do n\u00facleo ao processar um mech-token inv\u00e1lido em uma requisi\u00e7\u00e3o de estabelecimento de sess\u00e3o enviada pelo cliente. A vulnerabilidade \u00e9 causada pelo tratamento inadequado dos dados com o mech-token SMB2 e leva \u00e0 leitura de dados al\u00e9m do buffer alocado.    <\/p>\n<p>Adicionalmente, pode-se destacar mais algumas vulnerabilidades no n\u00facleo do Linux:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2023-52439 \u2014 acesso \u00e0 mem\u00f3ria j\u00e1 liberada (use-after-free) na fun\u00e7\u00e3o uio_open do subsistema uio, potencialmente permitindo que um usu\u00e1rio local execute seu c\u00f3digo com privil\u00e9gios de n\u00facleo.\n<li class=\"l\"> CVE-2024-26582 \u2014 acesso \u00e0 mem\u00f3ria j\u00e1 liberada (use-after-free) na implementa\u00e7\u00e3o de TLS no n\u00edvel do n\u00facleo (ktls), potencialmente permitindo a eleva\u00e7\u00e3o de privil\u00e9gios durante opera\u00e7\u00f5es de descriptografia.\n<li class=\"l\"> CVE-2024-0646 \u2014 grava\u00e7\u00e3o em uma \u00e1rea de mem\u00f3ria fora do buffer no subsistema ktls devido a uma manipula\u00e7\u00e3o local espec\u00edfica do socket ktls usando a fun\u00e7\u00e3o splice. A vulnerabilidade potencialmente permite a eleva\u00e7\u00e3o de privil\u00e9gios no sistema.\n<li class=\"l\"> CVE-2023-6932 \u2014 condi\u00e7\u00e3o de corrida na implementa\u00e7\u00e3o do protocolo IGMP (Internet Group Management Protocol) na pilha IPv4, resultando em acesso \u00e0 mem\u00f3ria j\u00e1 liberada (use-after-free). A vulnerabilidade potencialmente permite que um usu\u00e1rio local eleve seus privil\u00e9gios no sistema.\n<li class=\"l\"> CVE-2023-52435 \u2014 estouro de MSS na fun\u00e7\u00e3o skb_segment() da pilha de rede do n\u00facleo.\n<li class=\"l\"> CVE-2024-26601 \u2014 erro no c\u00f3digo de libera\u00e7\u00e3o de blocos no sistema de arquivos ext4 pode ser utilizado para corromper o bitmap buddy.\n<li class=\"l\"> CVE-2024-26598 \u2014 acesso \u00e0 mem\u00f3ria j\u00e1 liberada (use-after-free) no hipervisor <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/vps\/abuzoustojchivye-vps\/\"   title=\"KVM\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4386\">KVM<\/a>.        <\/ul>\n<p>Fonte: <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 5.0.3 - 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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a pilha de rede | ProHoster","description":"No m\u00f3dulo ksmbd, que oferece uma implementa\u00e7\u00e3o de servidor de arquivos baseada no protocolo SMB integrada ao kernel do Linux, foram identificadas duas vulnerabilidades que permitem a execu\u00e7\u00e3o de comandos remotos sem autentica\u00e7\u00e3o.","canonical_url":"https:\/\/prohoster.info\/pt\/blog\/news\/uyazvimosti-v-yadre-linux-zatragivayushhie-ksmbd-ktls-uio-i-setevoj-stek","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"pt_PT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS 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