{"id":84662,"date":"2020-06-10T01:42:15","date_gmt":"2020-06-09T23:42:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-upnp-podhodyashhaya-dlya-usileniya-ddos-atak-i-skanirovaniya-vnutrennej-seti"},"modified":"2020-06-10T01:42:15","modified_gmt":"2020-06-09T23:42:15","slug":"uyazvimost-v-upnp-podhodyashhaya-dlya-usileniya-ddos-atak-i-skanirovaniya-vnutrennej-seti","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-upnp-podhodyashhaya-dlya-usileniya-ddos-atak-i-skanirovaniya-vnutrennej-seti","title":{"rendered":"UPnP-sebess\u00e9g, amely alkalmas a DDoS-t\u00e1mad\u00e1sok fokoz\u00e1s\u00e1ra \u00e9s a bels\u0151 h\u00e1l\u00f3zat szkennel\u00e9s\u00e9re","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Kib\u0151v\u00fclt<\/a><\/noindex> inform\u00e1ci\u00f3k sebezhet\u0151s\u00e9gek<\/a><\/noindex> (CVE-2020-12695<\/a><\/noindex>) az UPnP protokollban, amely lehet\u0151v\u00e9 teszi a forgalom k\u00fcld\u00e9s\u00e9t tetsz\u0151leges c\u00edmzettnek a szabv\u00e1nyban el\u0151\u00edrt «SUBSCRIBE» m\u0171velet haszn\u00e1lat\u00e1val. A sebezhet\u0151s\u00e9get k\u00f3dn\u00e9vvel l\u00e1tt\u00e1k el. CallStranger<\/a><\/noindex>. A sebezhet\u0151s\u00e9g lehet\u0151v\u00e9 teszi adatok kiolvas\u00e1s\u00e1t a DLP rendszerekkel v\u00e9dett h\u00e1l\u00f3zatokb\u00f3l, portszkennel\u00e9st a bels\u0151 h\u00e1l\u00f3zat sz\u00e1m\u00edt\u00f3g\u00e9pein, \u00e9s a DDoS-t\u00e1mad\u00e1sok fokoz\u00e1s\u00e1t a vil\u00e1gm\u00e9ret\u0171 UPnP-eszk\u00f6z\u00f6k milli\u00f3ival, mint p\u00e9ld\u00e1ul k\u00e1beles modemek, h\u00e1zi \u00fatv\u00e1laszt\u00f3k, j\u00e1t\u00e9kkonzolok, IP kamer\u00e1k, TV set-top boxok, m\u00e9diak\u00f6zpontok \u00e9s nyomtat\u00f3k.<\/p>\n

Probl\u00e9ma is caused by<\/a><\/noindex> azzal, hogy a specifik\u00e1ci\u00f3ban szerepl\u0151 «SUBSCRIBE» funkci\u00f3 lehet\u0151v\u00e9 teszi b\u00e1rmilyen k\u00fcls\u0151 t\u00e1mad\u00f3 sz\u00e1m\u00e1ra, hogy HTTP-csomagokat k\u00fcldj\u00f6n Callback fejl\u00e9ccel, \u00e9s az UPnP eszk\u00f6zt proxyk\u00e9nt haszn\u00e1lja m\u00e1s hosztokhoz val\u00f3 k\u00e9r\u00e9sek tov\u00e1bb\u00edt\u00e1s\u00e1ra. A «SUBSCRIBE» funkci\u00f3t az UPnP specifik\u00e1ci\u00f3 hat\u00e1rozza meg, \u00e9s m\u00e1s eszk\u00f6z\u00f6k \u00e9s szolg\u00e1ltat\u00e1sok v\u00e1ltoz\u00e1sainak nyomon k\u00f6vet\u00e9s\u00e9re haszn\u00e1lj\u00e1k. A Callback HTTP-fejl\u00e9c seg\u00edts\u00e9g\u00e9vel tetsz\u0151leges URL-t adhatunk meg, amelyhez az eszk\u00f6z pr\u00f3b\u00e1l csatlakozni. <\/p>\n

\"UPnP-sebess\u00e9g,<\/a><\/noindex><\/center><\/p>\n

A probl\u00e9m\u00e1nak szinte minden UPnP-implement\u00e1ci\u00f3 ki van t\u00e9ve, amely a specifik\u00e1ci\u00f3<\/a><\/noindex>el\u0151tt k\u00e9sz\u00fclt \u00e1prilis 17-ig. A sebezhet\u0151s\u00e9g fenn\u00e1ll\u00e1s\u00e1t meger\u0151s\u00edtett\u00e9k<\/a><\/noindex> a ny\u00edlt csomagban hostapd<\/a><\/noindex> vezet\u00e9kn\u00e9lk\u00fcli hozz\u00e1f\u00e9r\u00e9si pont (WPS AP) implement\u00e1ci\u00f3j\u00e1val. A jav\u00edt\u00e1s jelenleg el\u00e9rhet\u0151 jav\u00edt\u00f3csomagok form\u00e1j\u00e1ban<\/a><\/noindex>. A disztrib\u00faci\u00f3kban a friss\u00edt\u00e9sek jelenleg nem ker\u00fcltek kiad\u00e1sra (Debian<\/a><\/noindex>, OpenWRT<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, RHEL<\/a><\/noindex>, SUSE<\/a><\/noindex>, Fedora<\/a><\/noindex>, Arch<\/a><\/noindex>). A probl\u00e9ma szint\u00e9n \u00e9rinti<\/a><\/noindex> ny\u00edlt UPnP-Stack alap\u00fa megold\u00e1sokra pupnp<\/a><\/noindex>, a jav\u00edt\u00e1sokkal kapcsolatos inform\u00e1ci\u00f3k jelenleg nem \u00e1llnak rendelkez\u00e9sre.<\/p>\n

Az UPnP protokoll automatikus eszk\u00f6zfelismer\u00e9st \u00e9s interakci\u00f3t defini\u00e1l a helyi h\u00e1l\u00f3zatban. A protokoll eredetileg bels\u0151 helyi h\u00e1l\u00f3zatokra van tervezve, \u00e9s nem tartalmaz autentik\u00e1ci\u00f3s \u00e9s ellen\u0151rz\u00e9si form\u00e1kat. Ennek ellen\u00e9re milli\u00f3k nem kapcsolj\u00e1k ki az UPnP t\u00e1mogat\u00e1s\u00e1t a k\u00fcls\u0151 h\u00e1l\u00f3zati interf\u00e9szeken, \u00e9s hozz\u00e1f\u00e9rhet\u0151k maradnak<\/a><\/noindex> a glob\u00e1lis h\u00e1l\u00f3zatr\u00f3l \u00e9rkez\u0151 k\u00e9r\u00e9sekhez. A t\u00e1mad\u00e1s b\u00e1rmely hasonl\u00f3 UPnP-eszk\u00f6z\u00f6n kereszt\u00fcl v\u00e9grehajthat\u00f3.
\nP\u00e9ld\u00e1ul az Xbox One konzolok t\u00e1madhat\u00f3k a 2869-es h\u00e1l\u00f3zati porton kereszt\u00fcl, mivel lehet\u0151v\u00e9 teszik a SUBSCRIBE paranccsal val\u00f3 v\u00e1ltoz\u00e1sok nyomon k\u00f6vet\u00e9s\u00e9t, p\u00e9ld\u00e1ul a tartalom megoszt\u00e1s\u00e1nak biztos\u00edt\u00e1s\u00e1t.<\/p>\n

Az Open Connectivity Foundation (OCF) tavaly \u00e9v v\u00e9g\u00e9n \u00e9rtes\u00fclt a probl\u00e9m\u00e1r\u00f3l, de eleinte elutas\u00edtotta, hogy azt a specifik\u00e1ci\u00f3 egy sebezhet\u0151s\u00e9gek\u00e9nt kezelje. A tov\u00e1bbi r\u00e9szletes jelent\u00e9s ut\u00e1n a probl\u00e9ma jelenl\u00e9t\u00e9t elismert\u00e9k, \u00e9s a specifik\u00e1ci\u00f3ba be\u00e9p\u00edtettek egy el\u0151\u00edr\u00e1st az UPnP haszn\u00e1lat\u00e1ra csak a LAN-interf\u00e9szeken. Mivel a probl\u00e9ma a szabv\u00e1ny hi\u00e1nyoss\u00e1gaib\u00f3l ad\u00f3dik, a sebezhet\u0151s\u00e9g jav\u00edt\u00e1sa egyes eszk\u00f6z\u00f6kben sok id\u0151t vehet ig\u00e9nybe, \u00e9s a r\u00e9gi eszk\u00f6z\u00f6kh\u00f6z firmware-friss\u00edt\u00e9sek sem biztos, hogy \u00e9rkeznek.<\/p>\n

A v\u00e9delem megker\u00fcl\u00e9s\u00e9re javasolt az UPnP eszk\u00f6z\u00f6k elszigetel\u00e9se a k\u00fcls\u0151 k\u00e9r\u00e9sekt\u0151l t\u0171zfallal, a k\u00fcls\u0151 «SUBSCRIBE» \u00e9s «NOTIFY» HTTP k\u00e9r\u00e9sek blokkol\u00e1sa t\u00e1mad\u00e1smegel\u0151z\u0151 rendszereken, vagy az UPnP protokoll letilt\u00e1sa a k\u00fcls\u0151 h\u00e1l\u00f3zati interf\u00e9szeken. A gy\u00e1rt\u00f3knak javasolt a SUBSCRIBE funkci\u00f3t alap\u00e9rtelmez\u00e9s szerint kikapcsolni, \u00e9s a bekapcsol\u00e1skor csak a bels\u0151 h\u00e1l\u00f3zatr\u00f3l \u00e9rkez\u0151 k\u00e9r\u00e9sek fogad\u00e1s\u00e1ra korl\u00e1tozni.
\nA saj\u00e1t eszk\u00f6zeik sebezhet\u0151s\u00e9g\u00e9nek tesztel\u00e9s\u00e9hez megjelent<\/a><\/noindex> egy speci\u00e1lis eszk\u00f6zk\u00e9szlet, amely Python nyelven k\u00e9sz\u00fclt \u00e9s MIT licenc alatt terjesztik. <\/p>\n

<\/a><\/noindex><\/p>\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\u044b \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e\u0431 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2020-12695) \u0432 \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0435 UPnP, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u043e\u0442\u043f\u0440\u0430\u0432\u043a\u0443 \u0442\u0440\u0430\u0444\u0438\u043a\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u0443\u0447\u0430\u0442\u0435\u043b\u044e, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044f \u043f\u0440\u0435\u0434\u0443\u0441\u043c\u043e\u0442\u0440\u0435\u043d\u043d\u0443\u044e \u0432 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0435 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044e «SUBSCRIBE». \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d\u043e \u043a\u043e\u0434\u043e\u0432\u043e\u0435 \u0438\u043c\u044f CallStranger. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043c\u043e\u0436\u0435\u0442 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0442\u044c\u0441\u044f \u0438\u0437\u0432\u043b\u0435\u0447\u0435\u043d\u0438\u044f \u0434\u0430\u043d\u043d\u044b\u0445 \u0438\u0437 \u0441\u0435\u0442\u0435\u0439, \u0437\u0430\u0449\u0438\u0449\u0451\u043d\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u043c\u0438 \u043f\u0440\u0435\u0434\u043e\u0442\u0432\u0440\u0430\u0449\u0435\u043d\u0438\u044f \u0443\u0442\u0435\u0447\u0435\u043a \u0434\u0430\u043d\u043d\u044b\u0445 (DLP), \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0441\u043a\u0430\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u043f\u043e\u0440\u0442\u043e\u0432 \u043a\u043e\u043c\u043f\u044c\u044e\u0442\u0435\u0440\u043e\u0432 \u0432\u043e \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0435\u0439 \u0441\u0435\u0442\u0438, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0434\u043b\u044f \u0443\u0441\u0438\u043b\u0435\u043d\u0438\u044f DDoS-\u0430\u0442\u0430\u043a \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u043c\u0438\u043b\u043b\u0438\u043e\u043d\u043e\u0432 \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0451\u043d\u043d\u044b\u0445 \u043a […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":84663,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-84662","post","type-post","status-publish","format-standard","has-post-thumbnail","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\udd47Sebezhet\u0151s\u00e9g az UPnP-ben, amely DDoS-t\u00e1mad\u00e1sok er\u0151s\u00edt\u00e9s\u00e9re \u00e9s a bels\u0151 h\u00e1l\u00f3zatok beolvashat\u00f3s\u00e1g\u00e1ra alkalmas | ProHoster","description":"Felt\u00e1rultak az adatok 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