{"id":111480,"date":"2023-11-13T15:10:13","date_gmt":"2023-11-13T13:10:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-openvpn-i-softether-vpn"},"modified":"2023-11-13T15:10:13","modified_gmt":"2023-11-13T13:10:13","slug":"uyazvimosti-v-openvpn-i-softether-vpn","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/uyazvimosti-v-openvpn-i-softether-vpn","title":{"rendered":"Vulnerabilidades no OpenVPN e SoftEther VPN","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Foi lan\u00e7ado o OpenVPN 2.6.7, um pacote para a cria\u00e7\u00e3o de redes privadas virtuais que permite estabelecer uma conex\u00e3o criptografada entre duas m\u00e1quinas clientes ou garantir o funcionamento de um servidor VPN centralizado para o uso simult\u00e2neo de v\u00e1rios clientes. A nova vers\u00e3o corrige duas vulnerabilidades:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2023-46850 \u2014 o acesso a uma \u00e1rea de mem\u00f3ria ap\u00f3s sua libera\u00e7\u00e3o (use-after-free) pode levar ao envio de conte\u00fado da mem\u00f3ria do processo para outra parte da conex\u00e3o, al\u00e9m de potencialmente permitir execu\u00e7\u00e3o remota de c\u00f3digo. O problema se manifesta em configura\u00e7\u00f5es que usam TLS (executadas sem o par\u00e2metro \u00ab--secret\u00bb).\n<li class=\"l\"> CVE-2023-46849 \u2014 a ocorr\u00eancia de uma situa\u00e7\u00e3o de divis\u00e3o por zero pode levar \u00e0 inicializa\u00e7\u00e3o remota de um encerramento an\u00f4malo do servidor de acesso em configura\u00e7\u00f5es que utilizam a op\u00e7\u00e3o \u00ab--fragment\u00bb.    <\/ul>\n<p>Entre as mudan\u00e7as n\u00e3o relacionadas \u00e0 seguran\u00e7a no OpenVPN 2.6.7:  <\/p>\n<ul>\n<li class=\"l\"> Adicionado um aviso ao enviar pacotes DATA_V1 por outra parte ao tentar conectar um cliente OpenVPN 2.6.x a servidores incompat\u00edveis baseados nas vers\u00f5es 2.4.0-2.4.4 (para eliminar a incompatibilidade, a op\u00e7\u00e3o \u00ab--disable-dco\u00bb pode ser utilizada).\n<li class=\"l\"> Foi removido o m\u00e9todo obsoleto vinculado ao OpenSSL 1.x, que utilizava o OpenSSL Engine para carregar chaves. O motivo informado \u00e9 a recusa do autor em relicenciar o c\u00f3digo com novas exce\u00e7\u00f5es de vincula\u00e7\u00e3o.\n<li class=\"l\"> Foi adicionada uma advert\u00eancia ao conectar o cliente p2p NCP ao <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/server\/dts-shicago\/\"   title=\"servidor\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2912\">servidor<\/a> p2mp (combina\u00e7\u00e3o usada para operar sem negocia\u00e7\u00e3o de cifras), pois existem problemas ao usar vers\u00f5es 2.6.x em ambos os lados da conex\u00e3o.\n<li class=\"l\"> Adicionado um aviso de que a flag \u00ab--show-groups\u00bb n\u00e3o exibe todos os grupos suportados.\n<li class=\"l\"> No par\u00e2metro \u00ab--dns\u00bb, a manipula\u00e7\u00e3o do argumento \u00abexclude-domains\u00bb foi removida, tendo surgido na ramifica\u00e7\u00e3o 2.6, mas ainda n\u00e3o suportada pelos backends.\n<li class=\"l\"> Foi adicionada uma advert\u00eancia que aparece se a mensagem de controle INFO tiver um tamanho excessivo e n\u00e3o puder ser encaminhada ao cliente.\n<li class=\"l\"> Para builds utilizando MinGW e MSVC, foi adicionada suporte ao sistema de build CMake. Removido o suporte ao antigo sistema de build MSVC.  <\/ul>\n<p>Adicionalmente, foi identificada a descoberta de 9 vulnerabilidades no c\u00f3digo aberto. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/vpn\/\"   title=\"VPN\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"213\">VPN<\/a>-servidor SoftEther. Um dos problemas (CVE-2023-27395) foi atribu\u00eddo ao n\u00edvel cr\u00edtico de perigo \u2014 a vulnerabilidade \u00e9 causada por um estouro de buffer e pode levar \u00e0 execu\u00e7\u00e3o remota de c\u00f3digo do lado do cliente ao tentar conectar-se a um servidor controlado por um invasor. A vulnerabilidade foi corrigida na atualiza\u00e7\u00e3o de junho do SoftEther VPN 4.42 Build 9798 RTM. Outras duas vulnerabilidades (CVE-2023-32634, CVE-2023-27516) permitem o acesso n\u00e3o autorizado \u00e0 sess\u00e3o VPN durante um ataque MITM atrav\u00e9s do uso de credenciais padr\u00e3o fornecidas para o servidor RPC. As vulnerabilidades foram resolvidas na forma de um patch.    <\/p>\n<p>As vulnerabilidades CVE-2023-31192 e CVE-2023-32275 (patch) podem resultar em vazamento de informa\u00e7\u00f5es confidenciais em alguns pacotes devido a ataques MITM. As 4 vulnerabilidades restantes (CVE-2023-22325, CVE-2023-23581, CVE-2023-22308 e CVE-2023-25774) podem ser exploradas para causar nega\u00e7\u00e3o de servi\u00e7o, como for\u00e7ar a desconex\u00e3o ou a falha do cliente. Recentemente, 7 vulnerabilidades tamb\u00e9m foram corrigidas na base de c\u00f3digo do SoftEther VPN, detalhes sobre as quais ainda n\u00e3o est\u00e3o dispon\u00edveis.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60103\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenVPN 2.6.7, \u043f\u0430\u043a\u0435\u0442\u0430 \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u0447\u0430\u0441\u0442\u043d\u044b\u0445 \u0441\u0435\u0442\u0435\u0439, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0433\u043e \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 \u043c\u0435\u0436\u0434\u0443 \u0434\u0432\u0443\u043c\u044f \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u0438\u043c\u0438 \u043c\u0430\u0448\u0438\u043d\u0430\u043c\u0438 \u0438\u043b\u0438 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0442\u044c \u0440\u0430\u0431\u043e\u0442\u0443 \u0446\u0435\u043d\u0442\u0440\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u043e\u0433\u043e VPN-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 \u0434\u043b\u044f \u043e\u0434\u043d\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 \u0440\u0430\u0431\u043e\u0442\u044b \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u043a\u043b\u0438\u0435\u043d\u0442\u043e\u0432. \u0412 \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0434\u0432\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2023-46850 &#8212; \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u0435 \u043a \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u043e\u0441\u043b\u0435 \u0435\u0451 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u0438\u044f (use-after-free) \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u0432\u0435\u0441\u0442\u0438 \u043a \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0435 \u043d\u0430 \u0434\u0440\u0443\u0433\u0443\u044e \u0441\u0442\u043e\u0440\u043e\u043d\u0443 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0433\u043e \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\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-111480","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=\"\u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d \u0432\u044b\u043f\u0443\u0441\u043a OpenVPN 2.6.7, \u043f\u0430\u043a\u0435\u0442\u0430 \u0434\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u0447\u0430\u0441\u0442\u043d\u044b\u0445 \u0441\u0435\u0442\u0435\u0439, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0433\u043e 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