{"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\/pt\/blog\/news\/uyazvimost-v-samba-pozvolyayushhaya-pomenyat-parol-lyubomu-polzovatelyu","title":{"rendered":"Vulnerabilidade no Samba que permite a qualquer usu\u00e1rio alterar a senha","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Foram lan\u00e7adas vers\u00f5es corretivas dos pacotes Samba 4.16.4, 4.15.9 e 4.14.14, corrigindo 5 vulnerabilidades. A libera\u00e7\u00e3o de atualiza\u00e7\u00f5es dos pacotes nas distribui\u00e7\u00f5es pode ser acompanhada nas p\u00e1ginas: Debian, Ubuntu, RHEL, SUSE, Arch, FreeBSD.    <\/p>\n<p>A vulnerabilidade mais cr\u00edtica (CVE-2022-32744) permite que usu\u00e1rios do dom\u00ednio Active Directory alterem a senha de qualquer usu\u00e1rio, incluindo a senha do administrador, obtendo controle total sobre o dom\u00ednio. O problema ocorre porque o KDC aceita solicita\u00e7\u00f5es kpasswd criptografadas com qualquer chave conhecida.     <\/p>\n<p>Um invasor que tiver acesso a  <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/domain\/\"   title=\"dom\u00ednio\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1234\">dom\u00ednio<\/a>, pode enviar uma solicita\u00e7\u00e3o fict\u00edcia para redefinir a senha em nome de outro usu\u00e1rio, criptografando-a com sua chave, e o KDC a processar\u00e1 sem validar a correspond\u00eancia da chave da conta. Al\u00e9m disso, chaves de controladores de dom\u00ednio que operam apenas no modo de leitura (RODC), que n\u00e3o t\u00eam autoridade para alterar senhas, podem ser usadas para enviar solicita\u00e7\u00f5es fict\u00edcias. Como uma medida de prote\u00e7\u00e3o alternativa, a suporte para o protocolo kpasswd pode ser desativada adicionando a linha 'kpasswd port = 0' no smb.conf.    <\/p>\n<p>Outras vulnerabilidades:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2022-32746 \u2014 usu\u00e1rios do Active Directory podem desencadear uma condi\u00e7\u00e3o de uso ap\u00f3s a libera\u00e7\u00e3o (use-after-free) no processo do servidor ao enviar solicita\u00e7\u00f5es LDAP formatadas de forma espec\u00edfica com 'add' ou 'modify'. O problema \u00e9 causado pelo m\u00f3dulo de log de auditoria acessando o conte\u00fado da mensagem LDAP ap\u00f3s o m\u00f3dulo de gerenciamento do banco de dados liberar a mem\u00f3ria alocada para a mensagem. Para realizar o ataque, \u00e9 necess\u00e1rio ter permiss\u00e3o para adicionar ou modificar alguns atributos privilegiados, como userAccountControl.\n<li class=\"l\"> CVE-2022-2031 \u2014 usu\u00e1rios do Active Directory podem contornar algumas restri\u00e7\u00f5es no controlador de dom\u00ednio. O KDC e o servi\u00e7o kpasswd t\u00eam a capacidade de descriptografar os tickets um do outro, pois compartilham um conjunto \u00fanico de chaves e contas. Portanto, um usu\u00e1rio que solicita uma altera\u00e7\u00e3o de senha pode usar o ticket recebido para acessar outros servi\u00e7os.\n<li class=\"l\"> CVE-2022-32745 \u2014 usu\u00e1rios do Active Directory podem causar a falha do processo do servidor ao enviar solicita\u00e7\u00f5es LDAP 'add' ou 'modify', que levam ao acesso a dados n\u00e3o inicializados.\n<li class=\"l\"> CVE-2022-32742 \u2014 vazamento de informa\u00e7\u00f5es sobre o conte\u00fado da mem\u00f3ria <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/server\/dts-los-angeles\/\"   title=\"servidor\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3841\">servidor<\/a> atrav\u00e9s de manipula\u00e7\u00f5es com o protocolo SMB1. Um cliente SMB1 com permiss\u00e3o para grava\u00e7\u00e3o em um compartilhamento pode criar condi\u00e7\u00f5es para gravar fragmentos do conte\u00fado da mem\u00f3ria do processo do servidor em um arquivo ou envi\u00e1-los para uma impressora. O ataque \u00e9 realizado enviando uma solicita\u00e7\u00e3o 'write' com um intervalo incorreto. O problema afeta apenas as vers\u00f5es do Samba anteriores \u00e0 4.11 (na vers\u00e3o 4.11, o suporte ao SMB1 est\u00e1 desativado por padr\u00e3o).                 <\/ul>\n<p>Fonte: <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 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b 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