{"id":36475,"date":"2019-10-31T22:11:51","date_gmt":"2019-10-31T19:11:51","guid":{"rendered":"https:\/\/prohoster.info\/blog\/vo-freebsd-ustraneno-6-uyazvimostej\/"},"modified":"2019-10-31T22:11:51","modified_gmt":"2019-10-31T19:11:51","slug":"vo-freebsd-ustraneno-6-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/vo-freebsd-ustraneno-6-uyazvimostej","title":{"rendered":"Seis vulnerabilidades foram corrigidas no FreeBSD","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Seis vulnerabilidades foram corrigidas no FreeBSD, que permitem aumentar privil\u00e9gios no sistema ou acessar dados do n\u00facleo. Os problemas foram resolvidos nas atualiza\u00e7\u00f5es 12.0-RELEASE-p8, 11.2-RELEASE-p12 e 11.3-RELEASE-p1.<\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/freebsd-announce@freebsd.org\/msg00899.html\">CVE-2019-5606<\/a><\/noindex> \u2014 um erro no manipulador de chamada close para descritores de arquivo criados atrav\u00e9s da chamada de sistema posix_openpt pode levar \u00e0 grava\u00e7\u00e3o em \u00e1reas de mem\u00f3ria do kernel j\u00e1 liberadas (write-after-free). Um invasor local pode explorar a vulnerabilidade para obter privil\u00e9gios de root ou escapar do ambiente jail;\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/freebsd-announce@freebsd.org\/msg00900.html\">CVE-2019-0053<\/a><\/noindex> \u2014 a falta de verifica\u00e7\u00e3o adequada da validade dos valores ao processar vari\u00e1veis de ambiente no c\u00f3digo do cliente telnet pode levar a um estouro de buffer ao se conectar a um servidor malicioso e possibilitar um ataque de execu\u00e7\u00e3o de c\u00f3digo no lado do cliente;\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/freebsd-announce@freebsd.org\/msg00901.html\">CVE-2019-5605<\/a><\/noindex> \u2014 um erro na implementa\u00e7\u00e3o do freebsd32_ioctl pode resultar em vazamento de \u00e1reas de mem\u00f3ria do kernel, que podem conter dados residuais do buffer do terminal ou do cache de arquivos;\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/freebsd-announce@freebsd.org\/msg00902.html\">CVE-2019-5603<\/a><\/noindex> \u2014 a possibilidade de iniciar um estouro do contador no pseudo-sistema de arquivos mqueuefs, que pode ser usado para acessar arquivos, diret\u00f3rios e sockets de outros processos pertencentes a outros usu\u00e1rios. Este problema pode ser aplicado para escapar do jail e, caso haja acesso root no jail, para obter privil\u00e9gios de root no sistema principal;\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/freebsd-announce@freebsd.org\/msg00903.html\">CVE-2019-5604<\/a><\/noindex> \u2014 um erro na verifica\u00e7\u00e3o de valores dos par\u00e2metros 'epid' e 'streamid' no c\u00f3digo de emula\u00e7\u00e3o de dispositivos XHCI no hipervisor bhyve permite acessar valores de mem\u00f3ria al\u00e9m do buffer alocado ou iniciar uma queda do sistema;\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/freebsd-announce@freebsd.org\/msg00904.html\">CVE-2019-5607<\/a><\/noindex> \u2014 um vazamento do contador de refer\u00eancia para descritores de sockets UNIX, usados para transfer\u00eancia de privil\u00e9gios entre processos, pode ser utilizado para obter acesso root ou escapar do ambiente jail.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51167\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u043e FreeBSD \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u043e \u0448\u0435\u0441\u0442\u044c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0438\u043b\u0438 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u0434\u0430\u043d\u043d\u044b\u043c \u044f\u0434\u0440\u0430. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u044b \u0432 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f\u0445 12.0-RELEASE-p8, 11.2-RELEASE-p12 \u0438 11.3-RELEASE-p1. CVE-2019-5606 &#8212; \u043e\u0448\u0438\u0431\u043a\u0430 \u0432 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0435 \u0432\u044b\u0437\u043e\u0432\u0430 close \u0434\u043b\u044f \u0444\u0430\u0439\u043b\u043e\u0432\u044b\u0445 \u0434\u0435\u0441\u043a\u0440\u0438\u043f\u0442\u043e\u0440\u043e\u0432, \u0441\u043e\u0437\u0434\u0430\u043d\u043d\u044b\u0445 \u0447\u0435\u0440\u0435\u0437 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u0439 \u0432\u044b\u0437\u043e\u0432 posix_openpt, \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u0437\u0430\u043f\u0438\u0441\u0438 \u0432 \u0443\u0436\u0435 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0451\u043d\u043d\u044b\u0435 \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438 \u044f\u0434\u0440\u0430 (write-after-free). \u041b\u043e\u043a\u0430\u043b\u044c\u043d\u044b\u0439 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a \u043c\u043e\u0436\u0435\u0442 [&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-36475","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - 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