{"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\/it\/blog\/novosti-interneta\/uyazvimost-v-upnp-podhodyashhaya-dlya-usileniya-ddos-atak-i-skanirovaniya-vnutrennej-seti","title":{"rendered":"Vulnerabilit\u00e0 in UPnP, adatta per potenziare attacchi DDoS e scansione della rete interna","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Svelato<\/a><\/noindex> informazioni su vulnerabilit\u00e0<\/a><\/noindex> (CVE-2020-12695<\/a><\/noindex>) nel protocollo UPnP, che consente di instradare il traffico a un destinatario arbitrario utilizzando l'operazione prevista dallo standard «SUBSCRIBE». La vulnerabilit\u00e0 \u00e8 stata assegnata il nome in codice CallStranger<\/a><\/noindex>. La vulnerabilit\u00e0 pu\u00f2 essere sfruttata per estrarre dati da reti protette da sistemi di prevenzione delle perdite di dati (DLP), per ottenere la scansione delle porte nei computer all'interno della rete e anche per potenziare attacchi DDoS tramite milioni di dispositivi UPnP connessi alla rete globale, come modem via cavo, router domestici, console di gioco, telecamere IP, set-top box, media center e stampanti.<\/p>\n

Problema \u00e8 causato<\/a><\/noindex> , in quanto la funzione «SUBSCRIBE» specificata consente a un attaccante esterno di inviare pacchetti HTTP con l'intestazione Callback e di utilizzare il dispositivo UPnP come proxy per inviare richieste ad altri host. La funzione «SUBSCRIBE» \u00e8 definita nella specifica UPnP e viene utilizzata per monitorare i cambiamenti in altri dispositivi e servizi. Tramite l'intestazione HTTP Callback \u00e8 possibile specificare un URL arbitrario al quale il dispositivo tenter\u00e0 di connettersi. <\/p>\n

\"Vulnerabilit\u00e0<\/a><\/noindex><\/center><\/p>\n

Quasi tutte le implementazioni di UPnP basate su specifiche<\/a><\/noindex>, rilasciate prima del 17 aprile, presentano questa vulnerabilit\u00e0. La presenza della vulnerabilit\u00e0 \u00e8 stata confermata<\/a><\/noindex> in un pacchetto aperto hostapd<\/a><\/noindex> con implementazione di access point wireless (WPS AP). Una correzione \u00e8 attualmente disponibile in forma di patch<\/a><\/noindex>. Gli aggiornamenti nei vari pacchetti non sono stati ancora rilasciati (Debian<\/a><\/noindex>, OpenWRT<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, RHEL<\/a><\/noindex>, SUSE<\/a><\/noindex>, Fedora<\/a><\/noindex>, Arch<\/a><\/noindex>). Anche il problema la<\/a><\/noindex> riguarda le soluzioni basate su uno stack UPnP aperto pupnp<\/a><\/noindex>, per cui non ci sono ancora informazioni sulle correzioni.<\/p>\n

Il protocollo UPnP definisce un meccanismo per la scoperta automatica dei dispositivi nella rete locale e per l'interazione con essi. Questo protocollo \u00e8 stato progettato originariamente per l'uso nelle reti locali ed \u00e8 privo di qualsiasi forma di autenticazione e verifica. Nonostante ci\u00f2, milioni di dispositivi non disattivano il supporto UPnP sulle interfacce di rete esterne e rimangono accessibili<\/a><\/noindex> per le richieste dalla rete globale. Un attacco pu\u00f2 essere effettuato tramite qualsiasi dispositivo UPnP simile.
\nAd esempio, le console Xbox One possono essere attaccate attraverso la porta di rete 2869, poich\u00e9 consentono di monitorare attraverso il comando SUBSCRIBE cambiamenti come la condivisione dei contenuti.<\/p>\n

L'Open Connectivity Foundation (OCF) \u00e8 stata avvisata del problema alla fine dell'anno scorso, ma inizialmente ha rifiutato di considerarlo una vulnerabilit\u00e0 della specifica. Dopo una segnalazione pi\u00f9 dettagliata, la presenza del problema \u00e8 stata riconosciuta e nella specifica \u00e8 stata aggiunta una raccomandazione per utilizzare UPnP solo sulle interfacce LAN. Poich\u00e9 il problema \u00e8 causato da una mancanza nella norma, la correzione delle vulnerabilit\u00e0 su singoli dispositivi pu\u00f2 richiedere molto tempo, e per i dispositivi pi\u00f9 vecchi potrebbero non esserci aggiornamenti del firmware.<\/p>\n

Come misure di protezione alternative, si consiglia di isolare i dispositivi UPnP dalle richieste esterne tramite firewall, bloccare le richieste HTTP esterne «SUBSCRIBE» e «NOTIFY» sui sistemi di prevenzione degli attacchi, oppure disabilitare il protocollo UPnP sulle interfacce di rete esterne. I produttori sono invitati a disattivare la funzione SUBSCRIBE nelle impostazioni predefinite e a limitarne l'attivazione solo per l'accettazione delle richieste dalla rete interna.
\nPer testare la vulnerabilit\u00e0 dei propri dispositivi pubblicato<\/a><\/noindex> \u00e8 stato sviluppato uno strumento specifico in Python, rilasciato sotto licenza MIT. <\/p>\n

<\/a><\/noindex><\/p>\n

Fonte: 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-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\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\n","aioseo_head_json":{"title":"\ud83e\udd47 Vulnerabilit\u00e0 in UPnP, adatta per potenziare attacchi DDoS e scansionare reti interne | ProHoster","description":"Sono state divulgate informazioni sulla vulnerabilit\u00e0 (CVE-2020-12695) nel protocollo UPnP, che consente di indirizzare traffico a qualsiasi destinatario utilizzando l'operazione 'SUBSCRIBE' prevista dallo standard. Questa vulnerabilit\u00e0 \u00e8 stata battezzata CallStranger. Pu\u00f2 essere sfruttata per estrarre dati da reti protette da sistemi DLP, per scansionare porte nei computer nella rete interna e per potenziare attacchi DDoS tramite milioni di dispositivi connessi","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/uyazvimost-v-upnp-podhodyashhaya-dlya-usileniya-ddos-atak-i-skanirovaniya-vnutrennej-seti","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","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 \u0432 UPnP, \u043f\u043e\u0434\u0445\u043e\u0434\u044f\u0449\u0430\u044f \u0434\u043b\u044f \u0443\u0441\u0438\u043b\u0435\u043d\u0438\u044f DDoS-\u0430\u0442\u0430\u043a \u0438 \u0441\u043a\u0430\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432\u043d\u0443\u0442\u0440\u0435\u043d\u043d\u0435\u0439 \u0441\u0435\u0442\u0438 | ProHoster","og:description":"\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","og:url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/uyazvimost-v-upnp-podhodyashhaya-dlya-usileniya-ddos-atak-i-skanirovaniya-vnutrennej-seti","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":"2020-06-09T23:42:15+00:00","article:modified_time":"2020-06-09T23:42:15+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"84662","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":null,"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":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-02-28 14:53:24","updated":"2022-09-27 14:10:17"},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts\/84662","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/comments?post=84662"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts\/84662\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/media\/84663"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/media?parent=84662"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/categories?post=84662"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/tags?post=84662"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}