{"id":181899,"date":"2026-06-04T14:48:20","date_gmt":"2026-06-04T12:48:20","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/ataka-na-realizaczii-http-2-privodyashhaya-k-ischerpaniyu-dostupnoj-pamyati"},"modified":"2026-06-04T14:48:20","modified_gmt":"2026-06-04T12:48:20","slug":"ataka-na-realizaczii-http-2-privodyashhaya-k-ischerpaniyu-dostupnoj-pamyati","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/ataka-na-realizaczii-http-2-privodyashhaya-k-ischerpaniyu-dostupnoj-pamyati","title":{"rendered":"HTTP\/2 megval\u00f3s\u00edt\u00e1sok elleni t\u00e1mad\u00e1s, amely a rendelkez\u00e9sre \u00e1ll\u00f3 mem\u00f3ria kimer\u00fcl\u00e9s\u00e9hez vezet","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Felt\u00e1rt\u00e1k a «HTTP\/2 Bomb» sebezhet\u0151s\u00e9get, amely k\u00fcl\u00f6nb\u00f6z\u0151 HTTP\/2 protokoll implement\u00e1ci\u00f3kat \u00e9rint, \u00e9s lehet\u0151v\u00e9 teszi a szolg\u00e1ltat\u00e1smegtagad\u00e1s el\u00e9r\u00e9st az \u00f6sszes rendelkez\u00e9sre \u00e1ll\u00f3 folyamatmem\u00f3ria kimer\u00edt\u00e9s\u00e9vel. A probl\u00e9m\u00e1t meger\u0151s\u00edtett\u00e9k a HTTP szerverekben, mint az nginx, Apache httpd (CVE-2026-49975), Microsoft IIS, Envoy (CVE-2026-47774) \u00e9s Cloudflare Pingora az alap\u00e9rtelmezett konfigur\u00e1ci\u00f3ban.<\/p>\n

A sebezhet\u0151s\u00e9g egy zip-bomb\u00e1hoz hasonl\u00f3 m\u00f3dszert haszn\u00e1l, amely a HTTP\/2 fejl\u00e9cek t\u00f6m\u00f6r\u00edt\u00e9si funkci\u00f3j\u00e1t c\u00e9lozza meg. Az \u00f6tlet az, hogy a k\u00e9r\u00e9s tartalmazhat ezernyi t\u00f6m\u00f6r\u00edtett fejl\u00e9ceket, p\u00e9ld\u00e1ul «Cookie», adataink n\u00e9lk\u00fcl, amelyek mindegyike egy b\u00e1jtos hivatkoz\u00e1ssal van jelen az HPACK index\u00e9ben, de a szerveren<\/a> teljes m\u00e9rt\u00e9kben mem\u00f3riafoglal\u00e1st ig\u00e9nyel az \u00f6sszes fejl\u00e9c sz\u00e1m\u00e1ra. A mem\u00f3riafogyaszt\u00e1s szintje k\u00fcl\u00f6nb\u00f6z\u0151 HTTP-szerverekn\u00e9l 70 b\u00e1jtt\u00f3l kezd\u0151dik indexenk\u00e9nt az nginx, IIS \u00e9s Pingora eset\u00e9ben, 4000 b\u00e1jtig az Apache httpd-n\u00e1l \u00e9s 5700 b\u00e1jtig az Envoy-n\u00e1l. Egy 100 Mbps s\u00e1vsz\u00e9less\u00e9g\u0171 v\u00e9gponti sz\u00e1m\u00edt\u00f3g\u00e9pr\u0151l ind\u00edtott t\u00e1mad\u00e1s sor\u00e1n, a 32 GB mem\u00f3ria kimer\u00edt\u00e9s\u00e9hez k\u00f6r\u00fclbel\u00fcl 10 m\u00e1sodpercre van sz\u00fcks\u00e9g az szerver<\/a> Envoy 1.37.2-n\u00e9l 18 m\u00e1sodpercig — Apache httpd 2.4.67-n\u00e9l 45 m\u00e1sodpercig — nginx 1.29.7-n\u00e9l.<\/p>\n

A sebezhet\u0151s\u00e9g blokkol\u00e1s\u00e1hoz az nginx 1.29.8 kiad\u00e1sban a freenginx projektb\u0151l \u00e1tvitt\u00e9k a max_headers utas\u00edt\u00e1st, amely alap\u00e9rtelmez\u00e9s szerint nem enged\u00e9lyezi t\u00f6bb mint 1000 fejl\u00e9c feldolgoz\u00e1s\u00e1t. Az Envoy jav\u00edt\u00e1sa
\nbe van \u00e9p\u00edtve az 1.35.11 \u00e9s 1.36.7 kiad\u00e1sokba, amelyekben megval\u00f3sultak a mutable_max_request_headers_kb \u00e9s max_headers_count korl\u00e1tok. Az Apache httpd jav\u00edt\u00e1s\u00e1t a mod_http2 2.0.41 modul kiad\u00e1s\u00e1ban javasolj\u00e1k, amely m\u00e9g nem ker\u00fclt be az Apache httpd kiad\u00e1sokba. A
\nMicrosoft IIS \u00e9s Cloudflare Pingora eset\u00e9ben a jav\u00edt\u00e1sok egyel\u0151re hi\u00e1nyoznak.
\nAlternat\u00edv v\u00e9delmi lehet\u0151s\u00e9gk\u00e9nt letilthat\u00f3 a HTTP\/2 protokoll haszn\u00e1lata, \u00e9s korl\u00e1tozhat\u00f3 a munkafolyamatok sz\u00e1m\u00e1ra el\u00e9rhet\u0151 mem\u00f3ria m\u00e9rete.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0420\u0430\u0441\u043a\u0440\u044b\u0442\u0430 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 «HTTP\/2 Bomb», \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u044e\u0449\u0435\u0439 \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0435 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 HTTP\/2 \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u043e\u0442\u043a\u0430\u0437\u0430 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438 \u0447\u0435\u0440\u0435\u0437 \u0438\u0441\u0447\u0435\u0440\u043f\u0430\u043d\u0438\u0435 \u0432\u0441\u0435\u0439 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e\u0439 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0443 \u043f\u0430\u043c\u044f\u0442\u0438. \u041d\u0430\u043b\u0438\u0447\u0438\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043f\u043e\u0434\u0442\u0432\u0435\u0440\u0436\u0434\u0435\u043d\u043e \u0432 HTTP-\u0441\u0435\u0440\u0432\u0435\u0440\u0430\u0445 nginx, Apache httpd (CVE-2026-49975), Microsoft IIS, Envoy (CVE-2026-47774) \u0438 Cloudflare Pingora \u0432 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u0438 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442 \u043c\u0435\u0442\u043e\u0434, \u043d\u0430\u043f\u043e\u043c\u0438\u043d\u0430\u044e\u0449\u0438\u0439 zip-\u0431\u043e\u043c\u0431\u0443, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u0443\u044e \u043a \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0441\u0436\u0430\u0442\u0438\u044f \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u043e\u0432 \u0432 HTTP\/2. […]<\/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-181899","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\udd47HTTP\/2 megval\u00f3s\u00edt\u00e1sok elleni t\u00e1mad\u00e1s, amely a rendelkez\u00e9sre \u00e1ll\u00f3 mem\u00f3ria kimer\u00fcl\u00e9s\u00e9hez vezet | ProHoster","description":"Felt\u00e1rt\u00e1k a 'HTTP\/2 Bomb' sebezhet\u0151s\u00e9get, amely k\u00fcl\u00f6nb\u00f6z\u0151 HTTP\/2 protokollmegval\u00f3s\u00edt\u00e1sokat \u00e9rint \u00e9s lehet\u0151v\u00e9 teszi a szolg\u00e1ltat\u00e1smegtagad\u00e1s el\u0151id\u00e9z\u00e9s\u00e9t az \u00f6sszes folyamatmem\u00f3ria kimer\u00edt\u00e9s\u00e9vel.","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/ataka-na-realizaczii-http-2-privodyashhaya-k-ischerpaniyu-dostupnoj-pamyati","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hu_HU","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\u0410\u0442\u0430\u043a\u0430 \u043d\u0430 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 HTTP\/2, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0430\u044f \u043a \u0438\u0441\u0447\u0435\u0440\u043f\u0430\u043d\u0438\u044e \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438 | ProHoster","og:description":"\u0420\u0430\u0441\u043a\u0440\u044b\u0442\u0430 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u044f \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 "HTTP\/2 Bomb", \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u044e\u0449\u0435\u0439 \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0435 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 HTTP\/2 \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u043e\u0442\u043a\u0430\u0437\u0430 \u0432 \u043e\u0431\u0441\u043b\u0443\u0436\u0438\u0432\u0430\u043d\u0438\u0438 \u0447\u0435\u0440\u0435\u0437 \u0438\u0441\u0447\u0435\u0440\u043f\u0430\u043d\u0438\u0435 \u0432\u0441\u0435\u0439 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e\u0439 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0443 \u043f\u0430\u043c\u044f\u0442\u0438.","og:url":"https:\/\/prohoster.info\/hu\/blog\/news\/ataka-na-realizaczii-http-2-privodyashhaya-k-ischerpaniyu-dostupnoj-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":"2026-06-04T12:48:20+00:00","article:modified_time":"2026-06-04T12:48:20+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\/hu\/wp-json\/wp\/v2\/posts\/181899","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/comments?post=181899"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/181899\/revisions"}],"predecessor-version":[{"id":182084,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/181899\/revisions\/182084"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/media?parent=181899"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/categories?post=181899"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/tags?post=181899"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}