{"id":22008,"date":"2025-02-20T12:53:36","date_gmt":"2025-02-20T15:53:36","guid":{"rendered":"https:\/\/www.ethicalhacker.com.br\/site\/?p=22008"},"modified":"2025-02-20T12:58:33","modified_gmt":"2025-02-20T15:58:33","slug":"vulnerabilidade-postgresql-explorada-junto-com-o-beyondtrust","status":"publish","type":"post","link":"https:\/\/www.ethicalhacker.com.br\/site\/2025\/02\/exploits\/vulnerabilidade-postgresql-explorada-junto-com-o-beyondtrust\/","title":{"rendered":"Vulnerabilidade PostgreSQL explorada junto com o BeyondTrust"},"content":{"rendered":"\n<div class=\"dad65929\">\n<div class=\"f9bf7997 d7dc56a8 c05b5566\">\n<div class=\"ds-markdown ds-markdown--block\">\n<p class=\"story-title\" style=\"text-align: justify;\"><strong>Vulnerabilidade do PostgreSQL explorada junto com o BeyondTrust Zero-Day em ataques direcionados<\/strong><\/p>\n<p style=\"text-align: justify;\">Recentemente, a comunidade de seguran\u00e7a cibern\u00e9tica foi alertada sobre uma vulnerabilidade cr\u00edtica no PostgreSQL, identificada como\u00a0<strong>CVE-2025-1094<\/strong>, que permite a execu\u00e7\u00e3o de c\u00f3digo arbitr\u00e1rio (ACE) atrav\u00e9s de inje\u00e7\u00e3o SQL. Essa falha foi explorada em conjunto com uma vulnerabilidade zero-day no software BeyondTrust, destacando a import\u00e2ncia de pr\u00e1ticas robustas de seguran\u00e7a e mitiga\u00e7\u00e3o proativa.<\/p>\n<p>Neste artigo, exploraremos como voc\u00ea pode utilizar Python para mitigar riscos associados a vulnerabilidades como a CVE-2025-1094, com exemplos pr\u00e1ticos de implementa\u00e7\u00e3o.<\/p>\n<p>\u00a0<\/p>\n<\/div>\n<div class=\"ds-markdown ds-markdown--block\">\n<p><strong>Entendendo a Vulnerabilidade CVE-2025-1094<\/strong><\/p>\n<p style=\"text-align: justify;\">A vulnerabilidade no PostgreSQL ocorre devido ao tratamento inadequado de caracteres UTF-8 inv\u00e1lidos, permitindo que um atacante explore comandos meta como\u00a0<code>\\!<\/code>\u00a0para executar comandos no sistema operacional. Isso pode ser especialmente perigoso quando combinado com inje\u00e7\u00f5es SQL, pois abre caminho para a execu\u00e7\u00e3o de c\u00f3digo arbitr\u00e1rio.<\/p>\n<p>\u00a0<\/p>\n<p><strong>Cen\u00e1rio de Ataque:<\/strong><\/p>\n<ul>\n<li>\n<p>Um atacante injeta um comando SQL malicioso em uma consulta.<\/p>\n<\/li>\n<li>\n<p>O comando\u00a0<code>\\!<\/code>\u00a0\u00e9 utilizado para executar comandos no shell do sistema.<\/p>\n<\/li>\n<li>\n<p>O atacante ganha controle sobre o sistema, podendo roubar dados, instalar malware ou causar outros danos.<\/p>\n<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<p><strong>Mitigando a vulnerabilidade com Python<\/strong><\/p>\n<p style=\"text-align: justify;\">Python \u00e9 uma linguagem poderosa para automa\u00e7\u00e3o de tarefas de seguran\u00e7a, incluindo a detec\u00e7\u00e3o e preven\u00e7\u00e3o de vulnerabilidades. Abaixo, apresentamos algumas pr\u00e1ticas para mitigar riscos associados ao CVE-2025-1094.<\/p>\n<p>\u00a0<\/p>\n<p><strong>1. Valida\u00e7\u00e3o de entradas<\/strong><\/p>\n<p style=\"text-align: justify;\">A primeira linha de defesa contra inje\u00e7\u00f5es SQL \u00e9 a valida\u00e7\u00e3o rigorosa das entradas de dados. Utilize bibliotecas como\u00a0<code>re<\/code> (express\u00f5es regulares) para garantir que apenas caracteres v\u00e1lidos sejam aceitos.<\/p>\n<p>\u00a0<\/p>\n<div class=\"md-code-block\">\n<pre><span class=\"token keyword\">import<\/span> re\n\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">validate_input<\/span><span class=\"token punctuation\">(<\/span>input_string<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span>\n    <span class=\"token comment\"># Permite apenas caracteres alfanum\u00e9ricos e alguns s\u00edmbolos seguros<\/span>\n    <span class=\"token keyword\">if<\/span> re<span class=\"token punctuation\">.<\/span><span class=\"token keyword\">match<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">r\"^[a-zA-Z0-9\\s\\.\\-_]*$\"<\/span><span class=\"token punctuation\">,<\/span> input_string<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span>\n        <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">True<\/span>\n    <span class=\"token keyword\">return<\/span> <span class=\"token boolean\">False<\/span>\n\n<span class=\"token comment\"># Exemplo de uso<\/span>\nuser_input <span class=\"token operator\">=<\/span> <span class=\"token string\">\"SELECT * FROM users WHERE username = 'admin'\"<\/span>\n<span class=\"token keyword\">if<\/span> <span class=\"token keyword\">not<\/span> validate_input<span class=\"token punctuation\">(<\/span>user_input<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"Entrada inv\u00e1lida detectada!\"<\/span><span class=\"token punctuation\">)<br \/><br \/><\/span><\/pre>\n<\/div>\n<p><strong>2. Uso de consultas parametrizadas<\/strong><\/p>\n<p style=\"text-align: justify;\">Consultas parametrizadas previnem inje\u00e7\u00f5es SQL ao separar claramente o c\u00f3digo SQL dos dados fornecidos pelo usu\u00e1rio. A biblioteca\u00a0<code>psycopg2<\/code> \u00e9 amplamente utilizada para interagir com o PostgreSQL em Python.<\/p>\n<p>\u00a0<\/p>\n<div class=\"md-code-block\">\n<pre><span class=\"token keyword\">import<\/span> psycopg2\n\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">safe_query<\/span><span class=\"token punctuation\">(<\/span>username<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span>\n    <span class=\"token keyword\">try<\/span><span class=\"token punctuation\">:<\/span>\n        connection <span class=\"token operator\">=<\/span> psycopg2<span class=\"token punctuation\">.<\/span>connect<span class=\"token punctuation\">(<\/span>\n            dbname<span class=\"token operator\">=<\/span><span class=\"token string\">\"mydatabase\"<\/span><span class=\"token punctuation\">,<\/span> user<span class=\"token operator\">=<\/span><span class=\"token string\">\"myuser\"<\/span><span class=\"token punctuation\">,<\/span> password<span class=\"token operator\">=<\/span><span class=\"token string\">\"mypassword\"<\/span><span class=\"token punctuation\">,<\/span> host<span class=\"token operator\">=<\/span><span class=\"token string\">\"localhost\"<\/span>\n        <span class=\"token punctuation\">)<\/span>\n        cursor <span class=\"token operator\">=<\/span> connection<span class=\"token punctuation\">.<\/span>cursor<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n        \n        <span class=\"token comment\"># Consulta parametrizada<\/span>\n        query <span class=\"token operator\">=<\/span> <span class=\"token string\">\"SELECT * FROM users WHERE username = %s\"<\/span>\n        cursor<span class=\"token punctuation\">.<\/span>execute<span class=\"token punctuation\">(<\/span>query<span class=\"token punctuation\">,<\/span> <span class=\"token punctuation\">(<\/span>username<span class=\"token punctuation\">,<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\n        \n        results <span class=\"token operator\">=<\/span> cursor<span class=\"token punctuation\">.<\/span>fetchall<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>results<span class=\"token punctuation\">)<\/span>\n    <span class=\"token keyword\">except<\/span> Exception <span class=\"token keyword\">as<\/span> e<span class=\"token punctuation\">:<\/span>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f\"Erro ao executar a consulta: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>e<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">\"<\/span><\/span><span class=\"token punctuation\">)<\/span>\n    <span class=\"token keyword\">finally<\/span><span class=\"token punctuation\">:<\/span>\n        <span class=\"token keyword\">if<\/span> connection<span class=\"token punctuation\">:<\/span>\n            cursor<span class=\"token punctuation\">.<\/span>close<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n            connection<span class=\"token punctuation\">.<\/span>close<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n\n<span class=\"token comment\"># Exemplo de uso<\/span>\nsafe_query<span class=\"token punctuation\">(<\/span><span class=\"token string\">\"admin\"<\/span><span class=\"token punctuation\">)<br \/><br \/><\/span><\/pre>\n<\/div>\n<p><strong>3. Monitoramento de comandos Shell<\/strong><\/p>\n<p style=\"text-align: justify;\">Para detectar tentativas de explora\u00e7\u00e3o do comando\u00a0<code>\\!<\/code>, voc\u00ea pode implementar um monitoramento de logs no PostgreSQL. Python pode ser usado para analisar logs em tempo real e alertar sobre atividades suspeitas.<\/p>\n<p>\u00a0<\/p>\n<div class=\"md-code-block\">\n<pre><span class=\"token keyword\">import<\/span> subprocess\n<span class=\"token keyword\">import<\/span> re\n\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">monitor_logs<\/span><span class=\"token punctuation\">(<\/span>log_file<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span>\n    <span class=\"token keyword\">try<\/span><span class=\"token punctuation\">:<\/span>\n        process <span class=\"token operator\">=<\/span> subprocess<span class=\"token punctuation\">.<\/span>Popen<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">\"tail\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"-f\"<\/span><span class=\"token punctuation\">,<\/span> log_file<span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> stdout<span class=\"token operator\">=<\/span>subprocess<span class=\"token punctuation\">.<\/span>PIPE<span class=\"token punctuation\">)<\/span>\n        <span class=\"token keyword\">while<\/span> <span class=\"token boolean\">True<\/span><span class=\"token punctuation\">:<\/span>\n            line <span class=\"token operator\">=<\/span> process<span class=\"token punctuation\">.<\/span>stdout<span class=\"token punctuation\">.<\/span>readline<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\n            <span class=\"token keyword\">if<\/span> <span class=\"token keyword\">not<\/span> line<span class=\"token punctuation\">:<\/span>\n                <span class=\"token keyword\">break<\/span>\n            <span class=\"token keyword\">if<\/span> re<span class=\"token punctuation\">.<\/span>search<span class=\"token punctuation\">(<\/span><span class=\"token string\">r\"\\\\!\"<\/span><span class=\"token punctuation\">,<\/span> line<span class=\"token punctuation\">.<\/span>decode<span class=\"token punctuation\">(<\/span><span class=\"token string\">\"utf-8\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span>\n                <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f\"Tentativa de execu\u00e7\u00e3o de shell detectada: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>line<span class=\"token punctuation\">.<\/span>decode<span class=\"token punctuation\">(<\/span><span class=\"token string\">'utf-8'<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">\"<\/span><\/span><span class=\"token punctuation\">)<\/span>\n    <span class=\"token keyword\">except<\/span> KeyboardInterrupt<span class=\"token punctuation\">:<\/span>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"Monitoramento interrompido.\"<\/span><span class=\"token punctuation\">)<\/span>\n\n<span class=\"token comment\"># Exemplo de uso<\/span>\nmonitor_logs<span class=\"token punctuation\">(<\/span><span class=\"token string\">\"\/var\/log\/postgresql\/postgresql.log\"<\/span><span class=\"token punctuation\">)<br \/><br \/><br \/><strong style=\"font-size: revert; color: initial; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;\">4. Atualiza\u00e7\u00e3o autom\u00e1tica do PostgreSQL<\/strong><\/span><\/pre>\n<\/div>\n<p style=\"text-align: justify;\">Manter o PostgreSQL atualizado \u00e9 crucial para mitigar vulnerabilidades conhecidas. Voc\u00ea pode utilizar Python para automatizar a verifica\u00e7\u00e3o e aplica\u00e7\u00e3o de atualiza\u00e7\u00f5es.<\/p>\n<p>\u00a0<\/p>\n<div class=\"md-code-block\">\n<pre><span class=\"token keyword\">import<\/span> subprocess\n\n<span class=\"token keyword\">def<\/span> <span class=\"token function\">update_postgresql<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span>\n    <span class=\"token keyword\">try<\/span><span class=\"token punctuation\">:<\/span>\n        <span class=\"token comment\"># Atualiza pacotes do PostgreSQL<\/span>\n        subprocess<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">\"sudo\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"apt-get\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"update\"<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<\/span> check<span class=\"token operator\">=<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span>\n        subprocess<span class=\"token punctuation\">.<\/span>run<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token string\">\"sudo\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"apt-get\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"install\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"--only-upgrade\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"postgresql\"<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">,<br \/><\/span> check<span class=\"token operator\">=<\/span><span class=\"token boolean\">True<\/span><span class=\"token punctuation\">)<\/span>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"PostgreSQL atualizado com sucesso.\"<\/span><span class=\"token punctuation\">)<\/span>\n    <span class=\"token keyword\">except<\/span> subprocess<span class=\"token punctuation\">.<\/span>CalledProcessError <span class=\"token keyword\">as<\/span> e<span class=\"token punctuation\">:<\/span>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f\"Erro ao atualizar o PostgreSQL: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>e<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">\"<\/span><\/span><span class=\"token punctuation\">)<\/span>\n\n<span class=\"token comment\"># Exemplo de uso<\/span>\nupdate_postgresql<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<br \/><br \/><br \/><strong style=\"font-size: revert; color: initial; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;\"><br \/>Conclus\u00e3o<\/strong><\/span><\/pre>\n<\/div>\n<p style=\"text-align: justify;\">A explora\u00e7\u00e3o de vulnerabilidades como a CVE-2025-1094 no PostgreSQL e a integra\u00e7\u00e3o com falhas de zero-day, como no BeyondTrust, destacam a necessidade de uma abordagem proativa em seguran\u00e7a cibern\u00e9tica. Utilizando Python, voc\u00ea pode implementar medidas eficazes para mitigar esses riscos, desde a valida\u00e7\u00e3o de entradas at\u00e9 o monitoramento de logs e a aplica\u00e7\u00e3o de atualiza\u00e7\u00f5es.<\/p>\n<p style=\"text-align: justify;\">Lembre-se: a seguran\u00e7a \u00e9 um processo cont\u00ednuo. Mantenha-se informado sobre as \u00faltimas vulnerabilidades, aplique patches regularmente e utilize ferramentas como Python para fortalecer suas defesas.<\/p>\n<p>\u00a0<\/p>\n<\/div>\n<p>Fonte e imagens: <a href=\"https:\/\/thehackernews.com\/2025\/02\/postgresql-vulnerability-exploited.html\" target=\"_blank\" rel=\"noopener\">https:\/\/thehackernews.com\/2025\/02\/postgresql-vulnerability-exploited.html<\/a><\/p>\n<\/div>\n<\/div>\n<p>\u00a0<\/p>\n<div class=\"dad65929\">\n<div class=\"f9bf7997 d7dc56a8 c05b5566\">\n<div class=\"ds-flex\">\n<div class=\"ds-flex abe97156\">\n<div class=\"ds-icon-button\" tabindex=\"0\">\n<div class=\"ds-icon\">\u00a0<\/div>\n<\/div>\n<div class=\"ds-icon-button\" tabindex=\"0\">\n<div class=\"ds-icon\">\u00a0<\/div>\n<\/div>\n<div class=\"ds-icon-button\" tabindex=\"0\">\n<div class=\"ds-icon\">\u00a0<\/div>\n<\/div>\n<div class=\"ds-icon-button\" tabindex=\"0\">\n<div class=\"ds-icon\">\u00a0<\/div>\n<\/div>\n<\/div>\n<div>\u00a0<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"e886deb9\">\n<div class=\"e214291b\">\u00a0<\/div>\n<\/div>\n\n\n","protected":false},"excerpt":{"rendered":"<p>Vulnerabilidade do PostgreSQL explorada junto com o BeyondTrust Zero-Day em ataques direcionados Recentemente, a comunidade de seguran\u00e7a cibern\u00e9tica foi alertada sobre uma vulnerabilidade cr\u00edtica no PostgreSQL, identificada como\u00a0CVE-2025-1094, que permite a execu\u00e7\u00e3o de c\u00f3digo arbitr\u00e1rio (ACE) atrav\u00e9s de inje\u00e7\u00e3o SQL. Essa falha foi explorada em conjunto com uma vulnerabilidade zero-day no software BeyondTrust, destacando a [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":22011,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[89,100,21,105],"tags":[],"class_list":["post-22008","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-basico","category-diversos","category-exploits","category-noticias"],"_links":{"self":[{"href":"https:\/\/www.ethicalhacker.com.br\/site\/wp-json\/wp\/v2\/posts\/22008","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ethicalhacker.com.br\/site\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ethicalhacker.com.br\/site\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ethicalhacker.com.br\/site\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ethicalhacker.com.br\/site\/wp-json\/wp\/v2\/comments?post=22008"}],"version-history":[{"count":13,"href":"https:\/\/www.ethicalhacker.com.br\/site\/wp-json\/wp\/v2\/posts\/22008\/revisions"}],"predecessor-version":[{"id":22044,"href":"https:\/\/www.ethicalhacker.com.br\/site\/wp-json\/wp\/v2\/posts\/22008\/revisions\/22044"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ethicalhacker.com.br\/site\/wp-json\/wp\/v2\/media\/22011"}],"wp:attachment":[{"href":"https:\/\/www.ethicalhacker.com.br\/site\/wp-json\/wp\/v2\/media?parent=22008"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ethicalhacker.com.br\/site\/wp-json\/wp\/v2\/categories?post=22008"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ethicalhacker.com.br\/site\/wp-json\/wp\/v2\/tags?post=22008"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}