Des versions corrig\u00e9es pour Samba 4.14.4, 4.13.8 et 4.12.15 ont \u00e9t\u00e9 pr\u00e9par\u00e9es pour rem\u00e9dier \u00e0 la vuln\u00e9rabilit\u00e9 (CVE-2021-20254), qui peut g\u00e9n\u00e9ralement entra\u00eener un plantage du processus smbd, mais dans le pire des cas, il n'exclut pas la possibilit\u00e9 d'un acc\u00e8s non autoris\u00e9 aux fichiers et de suppression de fichiers par un utilisateur non privil\u00e9gi\u00e9 dans le partage r\u00e9seau. <\/p>\n
La vuln\u00e9rabilit\u00e9 est caus\u00e9e par une erreur dans la fonction sids_to_unixids(), entra\u00eenant la lecture de donn\u00e9es hors des limites du tampon lors de la conversion des identifiants de groupes SID (Windows Security Identifier) en GID (Unix Group ID). Le probl\u00e8me survient lorsqu'un \u00e9l\u00e9ment n\u00e9gatif est ajout\u00e9 au cache des correspondances SID en GID. Les d\u00e9veloppeurs de Samba n'ont pas pu identifier des conditions fiables et r\u00e9p\u00e9tables pour la manifestation de la vuln\u00e9rabilit\u00e9, mais le chercheur qui a identifi\u00e9 la vuln\u00e9rabilit\u00e9 pense que le probl\u00e8me peut \u00eatre exploit\u00e9 pour supprimer des fichiers sur le le serveur<\/a> sans les droits appropri\u00e9s pour effectuer cette op\u00e9ration. \u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\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 4.14.4, 4.13.8 \u0438 4.12.15 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2021-20254), \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0432 \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u0435 \u0441\u043b\u0443\u0447\u0430\u0435\u0432 \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043a\u0440\u0430\u0445\u0443 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0430 smbd, \u043d\u043e \u0432 \u043d\u0430\u0438\u0445\u0443\u0434\u0448\u0435\u043c \u0441\u0446\u0435\u043d\u0430\u0440\u0438\u0438 \u043d\u0435 \u0438\u0441\u043a\u043b\u044e\u0447\u0430\u0435\u0442\u0441\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043d\u0435\u0430\u0432\u0442\u043e\u0440\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0444\u0430\u0439\u043b\u0430\u043c \u0438 \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u043c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u043c \u0444\u0430\u0439\u043b\u043e\u0432 \u043d\u0430 \u0441\u0435\u0442\u0435\u0432\u043e\u043c \u0440\u0430\u0437\u0434\u0435\u043b\u0435. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u043e\u0448\u0438\u0431\u043a\u043e\u0439 \u0432 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 sids_to_unixids(), \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0435\u0439 \u043a \u0447\u0442\u0435\u043d\u0438\u044e \u0434\u0430\u043d\u043d\u044b\u0445 \u0438\u0437 \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u0437\u0430 […]<\/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-100060","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47 Nouvelles versions de Samba 4.14.4, 4.13.8 et 4.12.15 corrig\u00e9es pour une vuln\u00e9rabilit\u00e9 | ProHoster","description":"Des versions corrig\u00e9es pour Samba 4.14.4, 4.13.8 et 4.12.15 ont \u00e9t\u00e9 pr\u00e9par\u00e9es pour rem\u00e9dier \u00e0 la vuln\u00e9rabilit\u00e9 (CVE-2021-20254), qui peut g\u00e9n\u00e9ralement entra\u00eener un plantage du processus smbd, mais dans le pire des cas, cela ne fait 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Source : opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"