{"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\/cs\/blog\/news\/uyazvimost-http-2-bomb-privodyashhaya-k-ischerpaniyu-operativnoj-pamyati","title":{"rendered":"Zranitelnost HTTP\/2 Bomb, vedouc\u00ed k vy\u010derp\u00e1n\u00ed opera\u010dn\u00ed pam\u011bti","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Na za\u010d\u00e1tku \u010dervna 2026 objevili v\u00fdzkumn\u00edci v oblasti kybernetick\u00e9 bezpe\u010dnosti z firmy Calif (s pomoc\u00ed AI agenta Codex) novou variantu \u00fatoku HTTP\/2 Bomb, kter\u00e1 funguje i z jednoho klientsk\u00e9ho za\u0159\u00edzen\u00ed s internetov\u00fdm p\u0159ipojen\u00edm o rychlosti 100 Mb\/s.<\/p>\n

\u00datok se skl\u00e1d\u00e1 ze dvou f\u00e1z\u00ed:<\/p>\n

    \n
  1. \n

    Manipulace se zmen\u0161en\u00edm HPACK: V protokolu HTTP\/2 se hlavi\u010dky zmen\u0161uj\u00ed pomoc\u00ed tabulky HPACK. \u00dato\u010dn\u00edk ode\u0161le t\u00e9m\u011b\u0159 pr\u00e1zdn\u00fd hlavi\u010dkov\u00fd \u0159\u00e1dek, ale pomoc\u00ed statis\u00edc\u016f instrukc\u00ed donutil server<\/a> rozbalovat a neust\u00e1le odkazovat na jeden a ten sam\u00fd drobn\u00fd prvek. To zp\u016fsobuje lavinov\u00fd n\u00e1r\u016fst spot\u0159eby pam\u011bti. serveru<\/a>.<\/p>\n<\/li>\n

  2. \n

    Blokace \u0159\u00eddic\u00edho toku (Flow Control): Pot\u00e9, co se pam\u011b\u0165 zapln\u00ed, \u00fato\u010dn\u00edk nastav\u00ed velikost okna \u0159\u00edzen\u00ed toku (flow-control window) na 0. To zp\u016fsob\u00ed, \u017ee server pozastav\u00ed odes\u00edl\u00e1n\u00ed odpov\u011bdi, \u010d\u00edm\u017e udr\u017euje obsazenou pam\u011b\u0165 a udr\u017euje p\u0159ipojen\u00ed otev\u0159en\u00e9 pravideln\u00fdmi 1bajtov\u00fdmi po\u017eadavky.<\/p>\n<\/li>\n<\/ol>\n

    Celkem jedno za\u0159\u00edzen\u00ed dok\u00e1\u017ee za 10\u201320 sekund vy\u010derpat a\u017e 32\u201364 GB opera\u010dn\u00ed pam\u011bti. \u00darove\u0148 spot\u0159eby pam\u011bti se u r\u016fzn\u00fdch HTTP server\u016f pohybuje od p\u0159ibli\u017en\u011b 70 bajt\u016f na ka\u017ed\u00fd bajt v indexu pro nginx, IIS a Pingora, a\u017e po 4000 bajt\u016f v Apache httpd a 5700 v Envoy.<\/p>\n

    Zranitelnosti jsou vystaveny prakticky v\u0161echny hlavn\u00ed serverov\u00e9 implementace HTTP\/2 v konfigurac\u00edch podle v\u00fdchoz\u00edho nastaven\u00ed:
    \nNGINX, Apache HTTPD (modul mod_http2), Microsoft IIS, Envoy, Cloudflare, Pingora<\/p>\n

    Zranitelnost byla opravena v nginx 1.29.8 (pomoc\u00ed direktivy max_headers z freenginx, kter\u00e1 ve v\u00fdchoz\u00edm nastaven\u00ed povoluje zpracov\u00e1n\u00ed maxim\u00e1ln\u011b 1000 hlavi\u010dek), Envoy 1.35.11 a 1.36.7 (mutable_max_request_headers_kb a max_headers_count), Appache mod_http2 2.0.41. Pro Microsoft IIS a Cloudflare Pingora opravy zat\u00edm neexistuj\u00ed.<\/p>\n

    HTTP server Angie nen\u00ed vystaven zranitelnosti, nebo\u0165 zavedl ochranu proti podobn\u00fdm \u00fatok\u016fm ji\u017e ve verzi 1.8.0, kter\u00e1 byla vyd\u00e1na v roce 2024.<\/p>\n

    Zdroj: 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\udd47Zranitelnost HTTP\/2 Bomb vedouc\u00ed k vy\u010derp\u00e1n\u00ed opera\u010dn\u00ed pam\u011bti | ProHoster","description":"Na za\u010d\u00e1tku \u010dervna 2026 objevili v\u00fdzkumn\u00edci v oblasti kybernetick\u00e9 bezpe\u010dnosti z firmy Calif (s pomoc\u00ed AI agenta Codex) novou variantu \u00fatoku HTTP\/2 Bomb, kter\u00e1 funguje i z jednoho klientsk\u00e9ho za\u0159\u00edzen\u00ed s internetov\u00fdm p\u0159ipojen\u00edm.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/uyazvimost-http-2-bomb-privodyashhaya-k-ischerpaniyu-operativnoj-pamyati","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c HTTP\/2 Bomb, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u0438\u0441\u0447\u0435\u0440\u043f\u0430\u043d\u0438\u044e \u043e\u043f\u0435\u0440\u0430\u0442\u0438\u0432\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 | ProHoster","og:description":"\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.","og:url":"https:\/\/prohoster.info\/cs\/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\/cs\/wp-json\/wp\/v2\/posts\/181901","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=181901"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/181901\/revisions"}],"predecessor-version":[{"id":182083,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/181901\/revisions\/182083"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=181901"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=181901"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=181901"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}