{"id":101267,"date":"2021-09-14T16:22:48","date_gmt":"2021-09-14T14:22:48","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-klientah-matrix-pozvolyayushhie-raskryt-klyuchi-skvoznogo-shifrovaniya"},"modified":"2021-09-14T16:22:48","modified_gmt":"2021-09-14T14:22:48","slug":"uyazvimosti-v-klientah-matrix-pozvolyayushhie-raskryt-klyuchi-skvoznogo-shifrovaniya","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/uyazvimosti-v-klientah-matrix-pozvolyayushhie-raskryt-klyuchi-skvoznogo-shifrovaniya","title":{"rendered":"Zranite\u013enosti v klientoch Matrix, ktor\u00e9 umo\u017e\u0148uj\u00fa odhali\u0165 k\u013e\u00fa\u010de end-to-end \u0161ifrovania.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Vo v\u00e4\u010d\u0161ine klientskych aplik\u00e1ci\u00ed pre decentralizovan\u00fa komunika\u010dn\u00fa platformu Matrix boli zisten\u00e9 zranite\u013enosti (CVE-2021-40823, CVE-2021-40824), ktor\u00e9 umo\u017e\u0148uj\u00fa z\u00edska\u0165 inform\u00e1cie o k\u013e\u00fa\u010doch pou\u017eit\u00fdch na prenos spr\u00e1v v chatoch s koncov\u00fdm \u0161ifrovan\u00edm (E2EE). \u00dato\u010dn\u00edk, ktor\u00fd skompromituje jedn\u00e9ho z pou\u017e\u00edvate\u013eov chatu, m\u00f4\u017ee de\u0161ifrova\u0165 spr\u00e1vy, ktor\u00e9 boli predt\u00fdm odoslan\u00e9 tomuto pou\u017e\u00edvate\u013eovi z zranite\u013en\u00fdch klientsk\u00fdch aplik\u00e1ci\u00ed. <\/p>\n

Na \u00faspe\u0161n\u00e9 zneu\u017eitie je potrebn\u00fd pr\u00edstup k \u00fa\u010dtu pr\u00edjemcu spr\u00e1v. Pr\u00edstup m\u00f4\u017ee by\u0165 z\u00edskan\u00fd bu\u010f prostredn\u00edctvom \u00faniku \u00fadajov o \u00fa\u010dte, alebo prostredn\u00edctvom hackovania Matrix servera, ku ktor\u00e9mu sa pou\u017e\u00edvate\u013e prip\u00e1ja. Najv\u00e4\u010d\u0161iu hrozbu zranite\u013enosti predstavuj\u00fa pre pou\u017e\u00edvate\u013eov \u0161ifrovan\u00fdch chatovac\u00edch miestnost\u00ed, ku ktor\u00fdm sa prip\u00e1jaj\u00fa Matrix servery ovl\u00e1dan\u00e9 \u00fato\u010dn\u00edkmi. Spr\u00e1vcovia tak\u00fdchto serverov<\/a> m\u00f4\u017eu sk\u00fasi\u0165 predstiera\u0165, \u017ee s\u00fa pou\u017e\u00edvate\u013emi servera, aby odchyt\u00e1vali spr\u00e1vy odosielan\u00e9 do chatu zo zranite\u013en\u00fdch klientsk\u00fdch aplik\u00e1ci\u00ed. <\/p>\n

Zranite\u013enosti s\u00fa sp\u00f4soben\u00e9 logick\u00fdmi chybami v realiz\u00e1ci\u00e1ch mechanizmu poskytovania op\u00e4tovn\u00e9ho pr\u00edstupu k k\u013e\u00fa\u010dom, navrhnut\u00fdch v matrix-js-sdk < 12.4.1 (CVE-2021-40823), matrix-android-sdk2 < 1.2.2 (CVE-2021-40824), matrix-rust-sdk < 0.4.0, FamedlySDK < 0.5.0 a Nheko \u2264 0.8.2. Realiz\u00e1cie zalo\u017een\u00e9 na kni\u017eniciach matrix-ios-sdk, matrix-nio a libolm zranite\u013enostiam nepodliehaj\u00fa. <\/p>\n

Zodpovedaj\u00facim sp\u00f4sobom sa zranite\u013enosti prejavuj\u00fa vo v\u0161etk\u00fdch aplik\u00e1ci\u00e1ch, ktor\u00e9 prevzali probl\u00e9mov\u00fd k\u00f3d, a net\u00fdkaj\u00fa sa priamo protokolov Matrix a Olm\/Megolm. Konkr\u00e9tne sa probl\u00e9m t\u00fdka hlavn\u00e9ho Matrix klienta Element (predt\u00fdm Riot) pre Web, desktopov\u00e9 syst\u00e9my a Android, ako aj tret\u00edch klientsk\u00fdch aplik\u00e1ci\u00ed a kni\u017en\u00edc, vr\u00e1tane FluffyChat, Nheko, Cinny a SchildiChat. Probl\u00e9m sa neprejavuje v ofici\u00e1lnom klientovi pre platformu iOS, ako aj v aplik\u00e1ci\u00e1ch Chatty, Hydrogen, mautrix, purple-matrix a Syphon. <\/p>\n

Zranite\u013enosti boli odhalen\u00e9 po\u010das auditu bezpe\u010dnosti klienta Element. Opravy boli u\u017e vydan\u00e9 pre v\u0161etky probl\u00e9mov\u00e9 klienty. Pou\u017e\u00edvate\u013eom sa odpor\u00fa\u010da naliehav\u00e9 nain\u0161talovanie aktualiz\u00e1ci\u00ed a pred in\u0161tal\u00e1ciou aktualiz\u00e1cie prepn\u00fa\u0165 klientov do offline re\u017eimu. D\u00f4kazy o zneu\u017eit\u00ed zranite\u013enosti pred zverejnen\u00edm opravy neexistuj\u00fa. Pod\u013ea \u0161tandardn\u00fdch logov klienta a servera<\/a> Ur\u010di\u0165, \u010di do\u0161lo k \u00fatoku, je nemo\u017en\u00e9, ale preto\u017ee pre \u00fatok je potrebn\u00e9 kompromitova\u0165 \u00fa\u010det, m\u00f4\u017eu administr\u00e1tori analyzova\u0165 pr\u00edtomnos\u0165 podozriv\u00fdch prihl\u00e1sen\u00ed v autentifika\u010dn\u00fdch logoch na svojich serveroch, a u\u017e\u00edvatelia m\u00f4\u017eu pos\u00fadi\u0165 zoznam zariaden\u00ed pripojen\u00fdch k svojmu \u00fa\u010dtu na z\u00e1klade ned\u00e1vnych op\u00e4tovn\u00fdch pripojen\u00ed a zmeny stavu d\u00f4very. <\/p>\n

Mechanizmus op\u00e4tovn\u00e9ho pr\u00edstupu k k\u013e\u00fa\u010dom (key sharing), v ktorom boli n\u00e1jden\u00e9 zranite\u013enosti, umo\u017e\u0148uje klientovi, ktor\u00fd nem\u00e1 k\u013e\u00fa\u010de na de\u0161ifrovanie spr\u00e1vy, po\u017eiada\u0165 o k\u013e\u00fa\u010de od odosielaj\u00faceho zariadenia alebo in\u00fdch svojich zariaden\u00ed. Napr\u00edklad tak\u00e1to funk\u010dnos\u0165 je nevyhnutn\u00e1 na zabezpe\u010denie de\u0161ifrovania star\u00fdch spr\u00e1v na novom zariaden\u00ed u\u017e\u00edvate\u013ea alebo v pr\u00edpade straty u\u017e\u00edvate\u013esk\u00fdch k\u013e\u00fa\u010dov. \u0160pecifik\u00e1cia protokolu predpisuje, aby sa na po\u017eiadavky na k\u013e\u00fa\u010de v predvolenom nastaven\u00ed neodpovedalo a aby sa posielali automaticky iba overen\u00fdm zariadeniam toho ist\u00e9ho u\u017e\u00edvate\u013ea. \u017dia\u013e, v praktick\u00fdch realiz\u00e1ci\u00e1ch t\u00e1to po\u017eiadavka nebola zabezpe\u010den\u00e1 a po\u017eiadavky na odoslanie k\u013e\u00fa\u010dov sa spracov\u00e1vali bez riadneho overenia zariadenia.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u0435 \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u0438\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0434\u043b\u044f \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b \u0434\u0435\u0446\u0435\u043d\u0442\u0440\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043a\u043e\u043c\u043c\u0443\u043d\u0438\u043a\u0430\u0446\u0438\u0439 Matrix \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2021-40823, CVE-2021-40824), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e \u043a\u043b\u044e\u0447\u0430\u0445, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0434\u043b\u044f \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0438 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0439 \u0432 \u0447\u0430\u0442\u0430\u0445 \u0441\u043e \u0441\u043a\u0432\u043e\u0437\u043d\u044b\u043c \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u0435\u043c (E2EE). \u0410\u0442\u0430\u043a\u0443\u044e\u0449\u0438\u0439, \u0441\u043a\u043e\u043c\u043f\u0440\u043e\u043c\u0435\u0442\u0438\u0440\u043e\u0432\u0430\u0432 \u043e\u0434\u043d\u043e\u0433\u043e \u0438\u0437 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u0447\u0430\u0442\u0430, \u043c\u043e\u0436\u0435\u0442 \u0440\u0430\u0441\u0448\u0438\u0444\u0440\u043e\u0432\u0430\u0442\u044c \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f, \u0440\u0430\u043d\u0435\u0435 \u043e\u0442\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0435 \u044d\u0442\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u0438\u0437 \u0443\u044f\u0437\u0432\u0438\u043c\u044b\u0445 \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u0438\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439. \u0414\u043b\u044f \u0443\u0441\u043f\u0435\u0448\u043d\u043e\u0439 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u0438 \u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f \u043d\u0430\u043b\u0438\u0447\u0438\u0435 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043a \u0443\u0447\u0451\u0442\u043d\u043e\u0439 \u0437\u0430\u043f\u0438\u0441\u0438 \u043f\u043e\u043b\u0443\u0447\u0430\u0442\u0435\u043b\u044f […]<\/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-101267","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\udd47Zranite\u013enosti v klientoch Matrix, ktor\u00e9 umo\u017e\u0148uj\u00fa odhali\u0165 k\u013e\u00fa\u010de \u0161ifrovania s koncov\u00fdm bodom | ProHoster","description":"Vo v\u00e4\u010d\u0161ine klientskych aplik\u00e1ci\u00ed pre platformu decentralizovanej komunik\u00e1cie Matrix boli odhalen\u00e9 zranite\u013enosti (CVE-2021-40823, CVE-2021-40824), ktor\u00e9 umo\u017e\u0148uj\u00fa z\u00edska\u0165 inform\u00e1cie o k\u013e\u00fa\u010doch pou\u017eit\u00fdch na prenos.","canonical_url":"https:\/\/prohoster.info\/sk\/blog\/news\/uyazvimosti-v-klientah-matrix-pozvolyayushhie-raskryt-klyuchi-skvoznogo-shifrovaniya","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sk_SK","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\u0438 \u0432 \u043a\u043b\u0438\u0435\u043d\u0442\u0430\u0445 Matrix, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u0440\u0430\u0441\u043a\u0440\u044b\u0442\u044c \u043a\u043b\u044e\u0447\u0438 \u0441\u043a\u0432\u043e\u0437\u043d\u043e\u0433\u043e \u0448\u0438\u0444\u0440\u043e\u0432\u0430\u043d\u0438\u044f | ProHoster","og:description":"\u0412 \u0431\u043e\u043b\u044c\u0448\u0438\u043d\u0441\u0442\u0432\u0435 \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u0438\u0445 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0434\u043b\u044f \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u044b \u0434\u0435\u0446\u0435\u043d\u0442\u0440\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043a\u043e\u043c\u043c\u0443\u043d\u0438\u043a\u0430\u0446\u0438\u0439 Matrix \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (CVE-2021-40823, CVE-2021-40824), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e \u043a\u043b\u044e\u0447\u0430\u0445, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u0434\u043b\u044f \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0438.","og:url":"https:\/\/prohoster.info\/sk\/blog\/news\/uyazvimosti-v-klientah-matrix-pozvolyayushhie-raskryt-klyuchi-skvoznogo-shifrovaniya","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":"2021-09-14T14:22:48+00:00","article:modified_time":"2021-09-14T14:22:48+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"101267","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":"2021-09-14 14:28:26","updated":"2026-02-22 15:30:28","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/101267","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/comments?post=101267"}],"version-history":[{"count":2,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/101267\/revisions"}],"predecessor-version":[{"id":162276,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/101267\/revisions\/162276"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/media?parent=101267"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/categories?post=101267"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/tags?post=101267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}