{"id":181901,"date":"2026-06-05T02:48:08","date_gmt":"2026-06-05T00:48:08","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-http-2-bomb-privodyashhaya-k-ischerpaniyu-operativnoj-pamyati"},"modified":"2026-06-05T02:48:08","modified_gmt":"2026-06-05T00:48:08","slug":"uyazvimost-http-2-bomb-privodyashhaya-k-ischerpaniyu-operativnoj-pamyati","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/uyazvimost-http-2-bomb-privodyashhaya-k-ischerpaniyu-operativnoj-pamyati","title":{"rendered":"Vulnerabilidade HTTP\/2 Bomb, levando ao esgotamento da mem\u00f3ria","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

No in\u00edcio de junho de 2026, pesquisadores de ciberseguran\u00e7a da empresa Calif (com a ajuda do agente de IA Codex) descobriram uma nova variante do ataque HTTP\/2 Bomb, que funciona mesmo a partir de um \u00fanico dispositivo cliente com uma conex\u00e3o de internet de 100 Mbps.<\/p>\n

O ataque consiste em duas etapas:<\/p>\n

    \n
  1. \n

    Manipula\u00e7\u00e3o da compress\u00e3o HPACK: No protocolo HTTP\/2, cabe\u00e7alhos s\u00e3o comprimidos usando uma tabela HPACK. O atacante envia um cabe\u00e7alho quase vazio, mas com centenas de milhares de instru\u00e7\u00f5es faz com que servidor<\/a> descompacte e fa\u00e7a refer\u00eancia constantemente a um mesmo elemento min\u00fasculo. Isso provoca um consumo de mem\u00f3ria em cascata. servidor<\/a>.<\/p>\n<\/li>\n

  2. \n

    Bloqueio do controle de fluxo: Ap\u00f3s a mem\u00f3ria ser preenchida, o invasor define o tamanho da janela de controle de fluxo (flow-control window) como 0. Isso faz com que o servidor pause o envio de respostas, mantendo a mem\u00f3ria ocupada e mantendo a conex\u00e3o aberta com solicita\u00e7\u00f5es peri\u00f3dicas de 1 byte.<\/p>\n<\/li>\n<\/ol>\n

    Apenas um cliente pode consumir de 32 a 64 GB de mem\u00f3ria em 10 a 20 segundos. O n\u00edvel de consumo de mem\u00f3ria em diferentes servidores HTTP varia de cerca de 70 bytes para cada byte no \u00edndice para nginx, IIS e Pingora, at\u00e9 4000 bytes no Apache httpd e 5700 no Envoy.<\/p>\n

    Praticamente todas as principais implementa\u00e7\u00f5es de servidores HTTP\/2 em configura\u00e7\u00f5es padr\u00e3o s\u00e3o vulner\u00e1veis:
    \nNGINX, Apache HTTPD (m\u00f3dulo mod_http2), Microsoft IIS, Envoy, Cloudflare, Pingora<\/p>\n

    A vulnerabilidade foi corrigida no nginx 1.29.8 (com a diretiva max_headers do freenginx, que por padr\u00e3o permite processar n\u00e3o mais que 1000 cabe\u00e7alhos), Envoy 1.35.11 e 1.36.7 (mutable_max_request_headers_kb e max_headers_count), Appache mod_http2 2.0.41. Para Microsoft IIS e Cloudflare Pingora, ainda n\u00e3o h\u00e1 corre\u00e7\u00f5es.<\/p>\n

    O servidor HTTP Angie n\u00e3o \u00e9 vulner\u00e1vel, pois implementou prote\u00e7\u00e3o contra esse tipo de ataque j\u00e1 na vers\u00e3o 1.8.0, lan\u00e7ada em 2024.<\/p>\n

    Fonte: linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

    \u0412 \u043d\u0430\u0447\u0430\u043b\u0435 \u0438\u044e\u043d\u044f 2026 \u0433\u043e\u0434\u0430 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u043a\u0438\u0431\u0435\u0440\u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Calif (\u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u0418\u0418-\u0430\u0433\u0435\u043d\u0442\u0430 Codex) \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0438\u043b\u0438 \u043d\u043e\u0432\u044b\u0439 \u0432\u0430\u0440\u0438\u0430\u043d\u0442 \u0430\u0442\u0430\u043a\u0438 HTTP\/2 Bomb, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u0434\u0430\u0436\u0435 \u0441 \u043e\u0434\u043d\u043e\u0433\u043e \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u043e\u0433\u043e \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430, \u0438\u043c\u0435\u044e\u0449\u0435\u0433\u043e \u0438\u043d\u0442\u0435\u0440\u043d\u0435\u0442-\u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u0435 \u0441\u043e \u0441\u043a\u043e\u0440\u043e\u0441\u0442\u044c\u044e 100 \u041c\u0431\u0438\u0442\/\u0441. \u0410\u0442\u0430\u043a\u0430 \u0441\u043e\u0441\u0442\u043e\u0438\u0442 \u0438\u0437 \u0434\u0432\u0443\u0445 \u044d\u0442\u0430\u043f\u043e\u0432: \u041c\u0430\u043d\u0438\u043f\u0443\u043b\u044f\u0446\u0438\u044f \u0441\u0436\u0430\u0442\u0438\u0435\u043c HPACK: \u0412 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0435 HTTP\/2 \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u0438 \u0441\u0436\u0438\u043c\u0430\u044e\u0442\u0441\u044f \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u0442\u0430\u0431\u043b\u0438\u0446\u044b HPACK. \u0410\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u0439 \u043e\u0442\u043f\u0440\u0430\u0432\u043b\u044f\u0435\u0442 \u043f\u043e\u0447\u0442\u0438 \u043f\u0443\u0441\u0442\u043e\u0439 \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043e\u043a, […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-181901","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Vulnerabilidade HTTP\/2 Bomb, levando ao esgotamento da mem\u00f3ria | ProHoster","description":"No in\u00edcio de junho de 2026, pesquisadores de ciberseguran\u00e7a da empresa Calif (com a ajuda do agente de IA Codex) descobriram uma nova variante do ataque HTTP\/2 Bomb, que funciona mesmo a partir de um \u00fanico dispositivo 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\u043d\u0430\u0447\u0430\u043b\u0435 \u0438\u044e\u043d\u044f 2026 \u0433\u043e\u0434\u0430 \u0438\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u043a\u0438\u0431\u0435\u0440\u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u0438 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Calif (\u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u0418\u0418-\u0430\u0433\u0435\u043d\u0442\u0430 Codex) \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0438\u043b\u0438 \u043d\u043e\u0432\u044b\u0439 \u0432\u0430\u0440\u0438\u0430\u043d\u0442 \u0430\u0442\u0430\u043a\u0438 HTTP\/2 Bomb, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u0434\u0430\u0436\u0435 \u0441 \u043e\u0434\u043d\u043e\u0433\u043e \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u043e\u0433\u043e \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430, \u0438\u043c\u0435\u044e\u0449\u0435\u0433\u043e.","og:url":"https:\/\/prohoster.info\/pt\/blog\/news\/uyazvimost-http-2-bomb-privodyashhaya-k-ischerpaniyu-operativnoj-pamyati","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2026-06-05T00:48:08+00:00","article:modified_time":"2026-06-05T00:48:08+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/posts\/181901","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/comments?post=181901"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/posts\/181901\/revisions"}],"predecessor-version":[{"id":182083,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/posts\/181901\/revisions\/182083"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/media?parent=181901"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/categories?post=181901"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/pt\/wp-json\/wp\/v2\/tags?post=181901"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}