{"id":144522,"date":"2025-10-09T11:12:23","date_gmt":"2025-10-09T09:12:23","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-redis-i-valkey-pozvolyayushhie-vypolnit-kod-na-servere-pri-nalichii-dostupa-k-bd"},"modified":"2025-10-09T11:12:23","modified_gmt":"2025-10-09T09:12:23","slug":"uyazvimosti-v-redis-i-valkey-pozvolyayushhie-vypolnit-kod-na-servere-pri-nalichii-dostupa-k-bd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/uyazvimosti-v-redis-i-valkey-pozvolyayushhie-vypolnit-kod-na-servere-pri-nalichii-dostupa-k-bd","title":{"rendered":"Vulnerabilidades no Redis e Valkey, permitindo execu\u00e7\u00e3o de c\u00f3digo no servidor com acesso ao BD.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Pesquisadores da empresa Wiz identificaram uma vulnerabilidade no banco de dados Redis (CVE-2025-49844), que permite a execu\u00e7\u00e3o remota de c\u00f3digo (RCE) no servidor. A quest\u00e3o foi classificada como de alto n\u00edvel de perigo (pontua\u00e7\u00e3o CVSS 10 de 10), e para explorar a vulnerabilidade, o atacante deve ter a capacidade de enviar solicita\u00e7\u00f5es ao banco de dados Redis, que permite a execu\u00e7\u00e3o de scripts Lua personalizados.    <\/p>\n<p>Al\u00e9m das inst\u00e2ncias p\u00fablicas do Redis, que fornecem acesso sem autentica\u00e7\u00e3o, a vulnerabilidade permite comprometer sistemas em nuvem e plataformas de hospedagem que suportam servi\u00e7os para trabalhar com Redis. De acordo com a empresa Wiz, a varredura da rede identificou cerca de 330 mil servidores Redis aceitando conex\u00f5es, dos quais cerca de 60 mil aceitam solicita\u00e7\u00f5es sem autentica\u00e7\u00e3o. A imagem oficial do cont\u00eainer Docker fornecida pelo projeto Redis est\u00e1 configurada para acesso sem autentica\u00e7\u00e3o por padr\u00e3o.       <\/p>\n<p>A vulnerabilidade \u00e9 causada por acessos \u00e0 mem\u00f3ria j\u00e1 liberada (use-after-free), manifestando-se ao manipular o coletor de lixo a partir de um script Lua especialmente formatado. O problema permite contornar a sandbox de isolamento do ambiente Lua no Redis e executar c\u00f3digo no sistema principal com os privil\u00e9gios do usu\u00e1rio sob o qual o banco de dados est\u00e1 sendo executado. \u00c9 not\u00e1vel que o erro permaneceu despercebido por 13 anos. Os pesquisadores que identificaram o problema demonstraram um exploit funcional, mas os detalhes da explora\u00e7\u00e3o ainda n\u00e3o foram revelados, a fim de dar tempo para a instala\u00e7\u00e3o de atualiza\u00e7\u00f5es.    <\/p>\n<p>A vulnerabilidade tamb\u00e9m se manifesta no projeto Valkey, que desenvolve um fork do Redis, fornecido na maioria das distribui\u00e7\u00f5es Linux, incluindo RedHat Enterprise Linux 10. A vulnerabilidade foi corrigida nas vers\u00f5es Redis 8.2.2, 8.0.4, 7.4.6, 7.2.11 e 6.2.20, assim como em Valkey 8.1.4, 8.0.6 e 7.2.11. Para verificar o estado da nova vers\u00e3o do pacote ou se uma corre\u00e7\u00e3o est\u00e1 sendo preparada nas distribui\u00e7\u00f5es, acesse as seguintes p\u00e1ginas: Debian, Ubuntu, Fedora, SUSE\/openSUSE, RHEL, Gentoo, Arch, FreeBSD, OpenBSD e NetBSD. Como uma medida alternativa de prote\u00e7\u00e3o no banco de dados, \u00e9 poss\u00edvel desativar a execu\u00e7\u00e3o de scripts Lua, proibindo os comandos EVAL e EVALSHA atrav\u00e9s de ACL.    <\/p>\n<p>Adicionalmente, podem ser mencionadas mais tr\u00eas vulnerabilidades, explor\u00e1veis atrav\u00e9s de scripts Lua e corrigidas nas \u00faltimas vers\u00f5es do Redis e do Valkey. Para prote\u00e7\u00e3o adicional contra essas vulnerabilidades, atrav\u00e9s da ACL, \u00e9 poss\u00edvel proibir as fam\u00edlias de comandos EVAL e FUNCTION.    <\/p>\n<ul>\n<li class=\"l\"> CVE-2025-46817 \u2014 um overflow inteiro nas fun\u00e7\u00f5es Lua de biblioteca, potencialmente permitindo a execu\u00e7\u00e3o de c\u00f3digo pr\u00f3prio no lado do servidor. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/pt\/server\/dts-los-angeles\/\"   title=\"servidor\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3984\">servidor<\/a> ao executar scripts Lua especialmente formatados.\n<li class=\"l\"> CVE-2025-46819 \u2014 um erro que leva \u00e0 leitura de dados fora dos limites do buffer ao executar um script Lua especialmente formatado. A vulnerabilidade pode ser explorada para causar a finaliza\u00e7\u00e3o inesperada do processo do servidor Redis.\n<li class=\"l\"> CVE-2025-46818 \u2014 a possibilidade de execu\u00e7\u00e3o de comandos no contexto de outro usu\u00e1rio do SGBD ao manipular objetos LUA a partir de um script Lua especificamente formatado.        <\/ul>\n<p>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=64022\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Wiz \u0432\u044b\u044f\u0432\u0438\u043b\u0438 \u0432 \u0421\u0423\u0411\u0414 Redis \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2025-49844), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0443\u044e \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043a\u043e\u0434\u0430 (RCE) \u043d\u0430 \u0441\u0435\u0440\u0432\u0435\u0440\u0435. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0435 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d \u043d\u0430\u0438\u0432\u044b\u0441\u0448\u0438\u0439 \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 (CVSS score 10 \u0438\u0437 10), \u043f\u0440\u0438 \u044d\u0442\u043e\u043c \u0434\u043b\u044f \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0430\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u0439 \u0434\u043e\u043b\u0436\u0435\u043d \u0438\u043c\u0435\u0442\u044c \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0438 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u043a \u0421\u0423\u0411\u0414 Redis, \u0434\u043e\u043f\u0443\u0441\u043a\u0430\u044e\u0449\u0435\u0439 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u0441\u043a\u0438\u0445 Lua-\u0441\u043a\u0440\u0438\u043f\u0442\u043e\u0432. \u041f\u043e\u043c\u0438\u043c\u043e \u043f\u0443\u0431\u043b\u0438\u0447\u043d\u043e \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u044b\u0445 \u044d\u043a\u0437\u0435\u043c\u043f\u043b\u044f\u0440\u043e\u0432 Redis, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u0445 \u0434\u043e\u0441\u0442\u0443\u043f \u0431\u0435\u0437 \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438, [&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-144522","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=\"\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Wiz \u0432\u044b\u044f\u0432\u0438\u043b\u0438 \u0432 \u0421\u0423\u0411\u0414 Redis \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2025-49844), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0443\u044e \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0433\u043e 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