{"id":102701,"date":"2021-12-22T09:36:38","date_gmt":"2021-12-22T07:36:38","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/reliz-http-servera-apache-2-4-52-s-ustraneniem-perepolneniya-bufera-v-mod_lua"},"modified":"2021-12-22T09:36:38","modified_gmt":"2021-12-22T07:36:38","slug":"reliz-http-servera-apache-2-4-52-s-ustraneniem-perepolneniya-bufera-v-mod_lua","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/reliz-http-servera-apache-2-4-52-s-ustraneniem-perepolneniya-bufera-v-mod_lua","title":{"rendered":"Lan\u00e7amento do servidor http Apache 2.4.52 com corre\u00e7\u00e3o de estouro de buffer no mod_lua","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Foi lan\u00e7ado o Apache HTTP Server 2.4.52, que apresenta 25 mudan\u00e7as e corrige 2 vulnerabilidades:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2021-44790 \u2014 estouro de buffer no mod_lua, manifestando-se na an\u00e1lise de solicita\u00e7\u00f5es compostas (multipart). A vulnerabilidade afeta configura\u00e7\u00f5es em que scripts Lua invocam a fun\u00e7\u00e3o r:parsebody() para analisar o corpo da solicita\u00e7\u00e3o, permitindo que um atacante cause um estouro de buffer ao enviar uma solicita\u00e7\u00e3o especialmente formatada. At\u00e9 o momento, n\u00e3o foram identificados exploits, mas, potencialmente, o problema pode levar \u00e0 execu\u00e7\u00e3o de c\u00f3digo no <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/server\/dts-newyork\/\"   title=\"servidor\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2693\">servidor<\/a>.\n<li class=\"l\"> CVE-2021-44224 \u2014 vulnerabilidade SSRF (Server Side Request Forgery) no mod_proxy, permitindo em configura\u00e7\u00f5es com a configura\u00e7\u00e3o \u201cProxyRequests on\u201d redirecionar a solicita\u00e7\u00e3o para outro manipulador no mesmo servidor, que aceita conex\u00f5es atrav\u00e9s de Unix Domain Socket. O problema tamb\u00e9m pode ser explorado para causar falhas ao criar condi\u00e7\u00f5es para a desreferencia\u00e7\u00e3o de ponteiro nulo. O problema afeta vers\u00f5es do Apache httpd a partir da vers\u00e3o 2.4.7.    <\/ul>\n<p>As modifica\u00e7\u00f5es mais not\u00e1veis, n\u00e3o relacionadas \u00e0 seguran\u00e7a:   <\/p>\n<ul>\n<li class=\"l\"> O mod_ssl adicionou suporte para constru\u00e7\u00e3o com a biblioteca OpenSSL 3.\n<li class=\"l\"> A determina\u00e7\u00e3o da biblioteca OpenSSL foi aprimorada em scripts autoconf.\n<li class=\"l\"> No mod_proxy para protocolos de tunelamento, foi adicionada a op\u00e7\u00e3o de desativar o redirecionamento de conex\u00f5es TCP semiabertas (half-close) configurando o par\u00e2metro \u201cSetEnv proxy-nohalfclose\u201d.\n<li class=\"l\"> Adicionadas verifica\u00e7\u00f5es adicionais para garantir que URIs n\u00e3o destinados ao proxy contenham esquema http\/https, e que os destinados ao proxy incluam o nome do host.\n<li class=\"l\"> No mod_proxy_connect e no mod_proxy, a modifica\u00e7\u00e3o do c\u00f3digo de estado ap\u00f3s sua entrega ao cliente \u00e9 proibida.\n<li class=\"l\"> Ao enviar respostas intermedi\u00e1rias ap\u00f3s receber solicita\u00e7\u00f5es com o cabe\u00e7alho \u201cExpect: 100-Continue\u201d, foi garantido que o resultado indique o estado \u201c100 Continue\u201d, e n\u00e3o o estado atual da solicita\u00e7\u00e3o.\n<li class=\"l\"> No mod_dav, foi adicionada suporte para extens\u00f5es CalDAV, onde ao gerar propriedades devem ser considerados tanto elementos do documento quanto elementos de propriedades. Novas fun\u00e7\u00f5es dav_validate_root_ns(), dav_find_child_ns(), dav_find_next_ns(), dav_find_attr_ns() e dav_find_attr() foram adicionadas e podem ser chamadas de outros m\u00f3dulos.\n<li class=\"l\"> No mpm_event, foi resolvido um problema com a interrup\u00e7\u00e3o de processos filhos ociosos ap\u00f3s um pico de carga no servidor.\n<li class=\"l\"> No mod_http2, foram corrigidas mudan\u00e7as regressivas que levavam a comportamentos incorretos ao processar restri\u00e7\u00f5es MaxRequestsPerChild e MaxConnectionsPerChild.\n<li class=\"l\"> As capacidades do m\u00f3dulo mod_md, utilizado para automatizar a obten\u00e7\u00e3o e a manuten\u00e7\u00e3o de certificados com o protocolo ACME (Automatic Certificate Management Environment), foram ampliadas:\n<ul>\n<li class=\"l\"> Adicionada a suporte ao mecanismo ACME External Account Binding (EAB), ativado por meio da diretiva MDExternalAccountBinding. Os valores para EAB podem ser configurados a partir de um arquivo externo no formato JSON, permitindo que par\u00e2metros de autentica\u00e7\u00e3o n\u00e3o sejam revelados no arquivo principal. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/server\/\"   title=\"configura\u00e7\u00f5es do servidor\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"997\">configura\u00e7\u00f5es do servidor<\/a>.\n<li class=\"l\"> Na diretiva \u2018MDCertificateAuthority\u2019, foi implementada a verifica\u00e7\u00e3o da indica\u00e7\u00e3o no par\u00e2metro URL http\/https ou um dos nomes predefinidos (\u2018LetsEncrypt\u2019, \u2018LetsEncrypt-Test\u2019, \u2018Buypass\u2019 e \u2018Buypass-Test\u2019).\n<li class=\"l\">  A diretiva MDContactEmail pode ser especificada dentro da se\u00e7\u00e3o .\n<li class=\"l\"> V\u00e1rios erros foram corrigidos, incluindo um vazamento de mem\u00f3ria que ocorria em caso de falhas ao carregar a chave privada.  <\/ul>\n<\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=56387\">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 \u0440\u0435\u043b\u0438\u0437 HTTP-\u0441\u0435\u0440\u0432\u0435\u0440\u0430 Apache 2.4.52, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043e 25 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439 \u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b 2 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2021-44790 &#8212; \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0431\u0443\u0444\u0435\u0440\u0430 \u0432 mod_lua, \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u044e\u0449\u0435\u0435\u0441\u044f \u043f\u0440\u0438 \u0440\u0430\u0437\u0431\u043e\u0440\u0435 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432, \u0441\u043e\u0441\u0442\u043e\u044f\u0449\u0438\u0445 \u0438\u0437 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u0447\u0430\u0441\u0442\u0435\u0439 (multipart). \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u0435\u0442 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u0438, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 Lua-\u0441\u043a\u0440\u0438\u043f\u0442\u044b \u0432\u044b\u0437\u044b\u0432\u0430\u044e\u0442 \u0444\u0443\u043d\u043a\u0446\u0438\u044e r:parsebody() \u0434\u043b\u044f \u0440\u0430\u0437\u0431\u043e\u0440\u0430 \u0442\u0435\u043b\u0430 \u0437\u0430\u043f\u0440\u043e\u0441\u0430, \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0435\u043c\u0443 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u043f\u0435\u0440\u0435\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0431\u0443\u0444\u0435\u0440\u0430 \u0447\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0437\u0430\u043f\u0440\u043e\u0441\u0430. \u0424\u0430\u043a\u0442\u043e\u0432 \u043d\u0430\u043b\u0438\u0447\u0438\u044f [&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-102701","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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