{"id":116414,"date":"2024-06-07T12:05:45","date_gmt":"2024-06-07T10:05:45","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-php-pozvolyayushhaya-vypolnit-kod-pri-rabote-v-rezhime-cgi"},"modified":"2024-06-07T12:05:45","modified_gmt":"2024-06-07T10:05:45","slug":"uyazvimost-v-php-pozvolyayushhaya-vypolnit-kod-pri-rabote-v-rezhime-cgi","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/uyazvimost-v-php-pozvolyayushhaya-vypolnit-kod-pri-rabote-v-rezhime-cgi","title":{"rendered":"Vulnerabilidade no PHP que permite a execu\u00e7\u00e3o de c\u00f3digo em modo CGI","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Uma vulnerabilidade foi descoberta no PHP (CVE-2024-4577) que permite a execu\u00e7\u00e3o de c\u00f3digo no servidor ou a visualiza\u00e7\u00e3o do c\u00f3digo-fonte do script PHP quando o PHP \u00e9 usado em modo CGI na plataforma Windows (configura\u00e7\u00f5es com mod_php, php-fpm e FastCGI n\u00e3o s\u00e3o afetadas). O problema foi corrigido nas vers\u00f5es PHP 8.3.8, 8.2.20 e 8.1.29.<\/p>\n<p>A vulnerabilidade \u00e9 um caso espec\u00edfico do problema corrigido em 2012, CVE-2012-1823, para o qual a prote\u00e7\u00e3o adicionada n\u00e3o foi suficiente para bloquear o ataque na plataforma Windows. O m\u00e9todo de ataque consiste na possibilidade de substituir o argumento de linha de comando ao iniciar o interpretador PHP atrav\u00e9s de manipula\u00e7\u00e3o dos par\u00e2metros da solicita\u00e7\u00e3o do script PHP. <\/p>\n<p>Na antiga vulnerabilidade CVE-2012-1823, bastava especificar op\u00e7\u00f5es de linha de comando em vez de par\u00e2metros de consulta, como por exemplo, &#171;http:\/\/localhost\/index.php?-s&#187; para mostrar o c\u00f3digo fonte do script. A nova vulnerabilidade se baseia no fato de que a plataforma Windows realiza a convers\u00e3o autom\u00e1tica de caracteres, permitindo que, para contornar a prote\u00e7\u00e3o adicionada anteriormente, sejam utilizados caracteres presentes em algumas codifica\u00e7\u00f5es e que s\u00e3o substitu\u00eddos pelo caractere &#171;-&#187; (por exemplo, http:\/\/localhost\/index.php?s). <\/p>\n<p>A vulnerabilidade foi confirmada em configura\u00e7\u00f5es com locales para chin\u00eas tradicional (cp950), chin\u00eas simplificado (cp936) e japon\u00eas (cp932), mas sua manifesta\u00e7\u00e3o tamb\u00e9m n\u00e3o est\u00e1 exclu\u00edda para outros locales. O problema se manifesta na configura\u00e7\u00e3o padr\u00e3o do pacote XAMPP (Apache + MariaDB + PHP + Perl), bem como em quaisquer configura\u00e7\u00f5es do Apache onde o php-cgi \u00e9 definido como o manipulador de scripts CGI atrav\u00e9s da configura\u00e7\u00e3o<br \/>\n&#8216;Action cgi-script &#171;\/cgi-bin\/php-cgi.exe&#187;&#8216; ou &#8216;Action application\/x-httpd-php-cgi &#171;\/php-cgi\/php-cgi.exe&#187;&#8216;, ou ao hospedar o interpretador php diretamente em &#171;\/cgi-bin&#187; e em quaisquer outros diret\u00f3rios onde a execu\u00e7\u00e3o de scripts CGI \u00e9 permitida atrav\u00e9s da diretiva ScriptAlias.<\/p>\n<p>Al\u00e9m disso, nas atualiza\u00e7\u00f5es PHP 8.3.8, 8.2.20 e 8.1.29, tr\u00eas outras vulnerabilidades foram corrigidas: <\/p>\n<ul>\n<li class=\"l\"> CVE-2024-5458 &#8212; possibilidade de contornar o filtro<br \/>\n   FILTER_VALIDATE_URL, utilizado na chamada da fun\u00e7\u00e3o filter_var.<\/p>\n<li class=\"l\">  CVE-2024-5585 &#8212; vetor de ataque alternativo para a vulnerabilidade CVE-2024-1874, permitindo contornar a prote\u00e7\u00e3o previamente adicionada e realizar a substitui\u00e7\u00e3o de comandos ao chamar arquivos bat e cmd atrav\u00e9s da fun\u00e7\u00e3o proc_open na plataforma Windows (vulnerabilidade BatBadBut).\n<li class=\"l\"> A suscetibilidade da fun\u00e7\u00e3o openssl_private_decrypt ao ataque de Marvin.\n<\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=61332\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412 PHP \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2024-4577), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0441\u0432\u043e\u0435\u0433\u043e \u043a\u043e\u0434\u0430 \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435 \u0438\u043b\u0438 \u043f\u0440\u043e\u0441\u043c\u043e\u0442\u0440\u0430 \u0438\u0441\u0445\u043e\u0434\u043d\u043e\u0433\u043e \u043a\u043e\u0434\u0430 PHP-\u0441\u043a\u0440\u0438\u043f\u0442\u0430 \u0432 \u0441\u043b\u0443\u0447\u0430\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f PHP \u0432 \u0440\u0435\u0436\u0438\u043c\u0435 CGI \u043d\u0430 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0435 Windows (\u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u0438 \u0441 mod_php, php-fpm \u0438 FastCGI \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043d\u0435 \u043f\u043e\u0434\u0432\u0435\u0440\u0436\u0435\u043d\u044b). \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0430 \u0432 \u0432\u044b\u043f\u0443\u0441\u043a\u0430\u0445 PHP 8.3.8, 8.2.20 \u0438 8.1.29. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0447\u0430\u0441\u0442\u043d\u044b\u043c \u0441\u043b\u0443\u0447\u0430\u0435\u043c \u0438\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0439 \u0432 2012 \u0433\u043e\u0434\u0443 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b CVE-2012-1823, [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-116414","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=\"\u0412 PHP \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c 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