{"id":120072,"date":"2024-10-07T13:09:25","date_gmt":"2024-10-07T11:09:25","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-cups-okazalas-prigodna-dlya-usileniya-trafika-pri-ddos-atakah"},"modified":"2024-10-07T13:09:25","modified_gmt":"2024-10-07T11:09:25","slug":"uyazvimost-v-cups-okazalas-prigodna-dlya-usileniya-trafika-pri-ddos-atakah","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-cups-okazalas-prigodna-dlya-usileniya-trafika-pri-ddos-atakah","title":{"rendered":"A CUPS-ban tal\u00e1lhat\u00f3 sebezhet\u0151s\u00e9g forgalomfokoz\u00e1sra volt alkalmas DDoS-t\u00e1mad\u00e1sok sor\u00e1n.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Az Akamai tartalomszolg\u00e1ltat\u00f3 h\u00e1l\u00f3zat biztons\u00e1gi csoportja \u00fajabb t\u00e1mad\u00e1si vektort azonos\u00edtott a cups-browsed folyamatban. Ez nemcsak egy l\u00e1ncszem a k\u00f3d v\u00e9grehajt\u00e1s\u00e1t okoz\u00f3 t\u00e1mad\u00e1sokban, hanem lehet\u0151s\u00e9get is ad arra, hogy a cups-browsed folyamatba k\u00fcld\u00f6tt k\u00e9r\u00e9sek, amelyek a 631-es porton korl\u00e1toz\u00e1s n\u00e9lk\u00fcl fogadj\u00e1k a kapcsolatokat, m\u00e1sik hosztra tov\u00e1bb\u00edtsanak adatokat, amelynek m\u00e9rete ak\u00e1r 600-szorosa is lehet az eredeti k\u00e9r\u00e9snek. \u00d6sszehasonl\u00edt\u00e1sk\u00e9ppen, a memcached eset\u00e9n a fokoz\u00e1si ar\u00e1ny 10-50 ezer, az NTP 556, a DNS pedig 28-54, m\u00edg a RIPv2 21 \u00e9s az SNMPv2 6. <\/p>\n

Ez a funkcionalit\u00e1s lehet\u0151v\u00e9 teszi, hogy a cups-browsed folyamatok forgalomn\u00f6vel\u0151k\u00e9nt m\u0171k\u00f6djenek DDoS-t\u00e1mad\u00e1sok sor\u00e1n. A forgalomn\u00f6vel\u0151 t\u00e1mad\u00e1si m\u00f3dszer l\u00e9nyege, hogy a DDoS-t\u00e1mad\u00e1sban r\u00e9szt vev\u0151 g\u00e9pek \u00e1ltal k\u00fcld\u00f6tt k\u00e9r\u00e9sek nem k\u00f6zvetlen\u00fcl a c\u00e9lrendszer fel\u00e9 ir\u00e1nyulnak, hanem egy k\u00f6zb\u00fcls\u0151 forgalomn\u00f6vel\u0151n kereszt\u00fcl. A h\u00e1l\u00f3zat szkennel\u00e9se sor\u00e1n t\u00f6bb mint 198 ezer sebezhet\u0151 CUPS rendszer ker\u00fclt el\u0151, amelyek k\u00f6z\u00fcl 34% (58 ezer rendszer) alkalmas volt a DDoS-t\u00e1mad\u00e1sok sor\u00e1n t\u00f6rt\u00e9n\u0151 forgalomn\u00f6vel\u00e9sre. <\/p>\n

A forgalomn\u00f6vel\u0151 m\u00f3dszerekt\u0151l elt\u00e9r\u0151en, amelyek hamis\u00edtott visszafel\u00e9 ir\u00e1nyul\u00f3 c\u00edmzettel k\u00fcldenek UDP-csomagokat, a cups-browsed haszn\u00e1lata lehet\u0151v\u00e9 teszi a spoofing elker\u00fcl\u00e9s\u00e9t. A cups-browsed szolg\u00e1ltat\u00e1s alap\u00e9rtelmezett lehet\u0151s\u00e9ggel b\u00edr PPD-f\u00e1jl let\u00f6lt\u00e9s\u00e9re tetsz\u0151leges helyr\u0151l. a szerver<\/a> v\u00e1laszul egy jogosulatlan k\u00fcls\u0151 k\u00e9r\u00e9sre, amely sor\u00e1n az \u00fcgyf\u00e9l URL-t k\u00fcld, \u00e9s a cups-browsed megpr\u00f3b\u00e1lja let\u00f6lteni a PPD-f\u00e1jlt a megadott szerverr\u0151l. <\/p>\n

A PPD f\u00e1jl cups-browsed-ben val\u00f3 bet\u00f6lt\u00e9s\u00e9re tett k\u00e9r\u00e9s sor\u00e1n az \u00abIPP URI\u00bb \u00e9rt\u00e9khez olyan kieg\u00e9sz\u00edt\u0151 bet\u00f6lt\u00e9st csatolhatunk, amely ak\u00e1r 989 byte-ot is el\u00e9rhet. Ekkor az inici\u00e1l\u00e1s sor\u00e1n a cups-browsed h\u00edv\u00e1sban az \u00abIPP URI\u00bb \u00e9rt\u00e9ket k\u00e9tszer is megism\u00e9tlik: egyszer a HTTP-fejl\u00e9cekben, m\u00e1sodszor pedig a POST k\u00e9r\u00e9s t\u00f6rzs\u00e9ben, \u00e9s a k\u00e9relmek ciklikusan ism\u00e9tl\u0151dnek a sikertelen bet\u00f6lt\u00e9sek \u00e9s v\u00e1laszok ut\u00e1n. szerverrel<\/a> 404-es hiba k\u00f3d. <\/p>\n

A 62%-os (35900) ellen\u0151rz\u00f6tt rendszer k\u00f6z\u00fcl a cups-browsed legal\u00e1bb 10 TCP\/IPP\/HTTP-k\u00e9r\u00e9st k\u00fcld\u00f6tt a c\u00e9lzott rendszer fel\u00e9 egyetlen alap UDP-k\u00e9r\u00e9sre v\u00e1laszk\u00e9nt. Az \u00e1tlagos sz\u00e1m 58000 probl\u00e9m\u00e1nak kitett rendszer eset\u00e9n 45 ism\u00e9telt megkeres\u00e9st jelentett. Optim\u00e1lis k\u00f6r\u00fclm\u00e9nyek k\u00f6z\u00f6tt egy 30 b\u00e1jtos alap k\u00e9relem 45 ism\u00e9telt megk\u00eds\u00e9rl\u00e9s\u00e9vel 18000 b\u00e1jt adatot k\u00fcld a c\u00e9l\u00e1llom\u00e1sra, azaz 600-szoros forgalomn\u00f6veked\u00e9s tapasztalhat\u00f3. A legrosszabb esetben a forgalomn\u00f6veked\u00e9s 108-szoros. <\/p>\n

Tov\u00e1bbi megjegyz\u00e9s, hogy a Cloudflare rekord m\u00e9ret\u0171 DDoS-t\u00e1mad\u00e1st h\u00e1r\u00edtott el, amely sor\u00e1n a c\u00e9lrendszer fel\u00e9 3.8 terabit\/m\u00e1sodperces (2.14 milli\u00e1rd csomag\/m\u00e1sodperc) forgalmat ir\u00e1ny\u00edtottak. Megjegyzik, hogy a t\u00e1mad\u00e1st sz\u00e1mos kompromitt\u00e1lt Asus \u00e9s Mikrotik otthoni router, valamint m\u00e1s, viszonylag friss sebezhet\u0151s\u00e9geket kihaszn\u00e1lva felt\u00f6rt DVR-eszk\u00f6z\u00f6k \u00e9s webszervers v\u00e9grehajt\u00e1s\u00e1val szervezt\u00e9k meg.
\n
Forr\u00e1s: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0413\u0440\u0443\u043f\u043f\u0430, \u043e\u0442\u0432\u0435\u0447\u0430\u044e\u0449\u0430\u044f \u0437\u0430 \u0431\u0435\u0437\u043e\u043f\u0430\u0441\u043d\u043e\u0441\u0442\u044c \u0441\u0435\u0442\u0438 \u0434\u043e\u0441\u0442\u0430\u0432\u043a\u0438 \u043a\u043e\u043d\u0442\u0435\u043d\u0442\u0430 Akamai, \u0432\u044b\u044f\u0432\u0438\u043b\u0430 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u0432\u0435\u043a\u0442\u043e\u0440 \u0430\u0442\u0430\u043a\u0438 \u043d\u0430 \u043f\u0440\u043e\u0446\u0435\u0441\u0441 cups-browsed, \u043f\u043e\u043c\u0438\u043c\u043e \u0435\u0433\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u043e\u0434\u043d\u043e\u0433\u043e \u0438\u0437 \u0437\u0432\u0435\u043d\u044c\u0435\u0432 \u0432 \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442\u0435, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0435\u043c \u043a \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044e \u043a\u043e\u0434\u0430 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435. \u0427\u0435\u0440\u0435\u0437 \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u043a \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0443 cups-browsed, \u0431\u0435\u0437 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0439 \u043f\u0440\u0438\u043d\u0438\u043c\u0430\u044e\u0449\u0435\u043c\u0443 \u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u0438\u044f \u043d\u0430 631 \u043f\u043e\u0440\u0442\u0443, \u043c\u043e\u0436\u043d\u043e \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u043d\u0430 \u0434\u0440\u0443\u0433\u043e\u0439 \u0445\u043e\u0441\u0442, \u0440\u0430\u0437\u043c\u0435\u0440 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0431\u0443\u0434\u0435\u0442 \u043f\u0440\u0435\u0432\u044b\u0448\u0430\u0442\u044c […]<\/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-120072","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\udd47A CUPS sebezhet\u0151s\u00e9ge a DDoS-t\u00e1mad\u00e1sok sor\u00e1n a forgalom fokoz\u00e1s\u00e1ra is alkalmas lett | ProHoster","description":"A CDN biztons\u00e1g\u00e1\u00e9rt felel\u0151s Akamai csoport egy \u00fajabb t\u00e1mad\u00e1si vektort azonos\u00edtott a cups-browsed folyamat ellen, ahelyett, hogy csak mint az exploit egyik l\u00e1ncszeme szerepelt 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\u043a.","og:url":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-cups-okazalas-prigodna-dlya-usileniya-trafika-pri-ddos-atakah","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":"2024-10-07T11:09:25+00:00","article:modified_time":"2024-10-07T11:09:25+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"120072","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":"2026-02-22 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