{"id":53107,"date":"2019-11-24T00:00:00","date_gmt":"2019-11-23T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/37-uyazvimostej-v-razlichnyh-realizatsiyah-vnc"},"modified":"2020-02-18T14:00:58","modified_gmt":"2020-02-18T11:00:58","slug":"37-uyazvimostej-v-razlichnyh-realizatsiyah-vnc","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/37-uyazvimostej-v-razlichnyh-realizatsiyah-vnc","title":{"rendered":"37 zranitelnost\u00ed v r\u016fzn\u00fdch implementac\u00edch VNC","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Pavel \u010ceremu\u0161kin z laborato\u0159e Kaspersky analyzoval<\/a><\/noindex> r\u016fzn\u00e9 implementace syst\u00e9mu vzd\u00e1len\u00e9ho p\u0159\u00edstupu VNC (Virtual Network Computing) a odhalil 37 zranitelnost\u00ed, kter\u00e9 byly zp\u016fsobeny probl\u00e9my s pam\u011bt\u00ed. Zranitelnosti zji\u0161t\u011bn\u00e9 v realizac\u00edch VNC server\u016f mohou b\u00fdt zneu\u017eity pouze autentizovan\u00fdm u\u017eivatelem, a \u00fatoky na zranitelnosti v klientsk\u00e9m k\u00f3du jsou mo\u017en\u00e9 p\u0159i p\u0159ipojen\u00ed u\u017eivatele k serveru ovl\u00e1dan\u00e9mu \u00fato\u010dn\u00edkem.<\/p>\n

Nejv\u011bt\u0161\u00ed po\u010det zranitelnost\u00ed byl zji\u0161t\u011bn v bal\u00ed\u010dku UltraVNC<\/a><\/noindex>, kter\u00fd je dostupn\u00fd pouze pro platformu Windows. Celkem bylo v UltraVNC odhaleno 22 zranitelnost\u00ed. 13 zranitelnost\u00ed m\u016f\u017ee potenci\u00e1ln\u011b v\u00e9st k vykon\u00e1n\u00ed k\u00f3du v syst\u00e9mu, 5 k \u00faniku obsahu pam\u011b\u0165ov\u00fdch oblast\u00ed a 4 k nedostupnosti slu\u017eeb.
\nZranitelnosti byly opraveny ve vyd\u00e1n\u00ed 1.2.3.0<\/a><\/noindex>.<\/p>\n

V otev\u0159en\u00e9 knihovn\u011b LibVNC<\/a><\/noindex> (LibVNCServer a LibVNCClient), kter\u00e1 se pou\u017e\u00edv\u00e1<\/a><\/noindex> v VirtualBoxu, bylo zji\u0161t\u011bno 10 zranitelnost\u00ed.
\n5 zranitelnost\u00ed (CVE-2018-20020<\/a><\/noindex>, CVE-2018-20019<\/a><\/noindex>, CVE-2018-15127<\/a><\/noindex>, CVE-2018-15126<\/a><\/noindex>, CVE-2018-6307<\/a><\/noindex>) je zp\u016fsobeno p\u0159ete\u010den\u00edm z\u00e1sobn\u00edku a m\u016f\u017ee potenci\u00e1ln\u011b v\u00e9st k vykon\u00e1n\u00ed k\u00f3du. 3 zranitelnosti mohou v\u00e9st k \u00faniku informac\u00ed, 2 k nedostupnosti slu\u017eeb.
\nV\u0161echny probl\u00e9my byly ji\u017e odstran\u011bny v\u00fdvoj\u00e1\u0159i, ale zm\u011bny zat\u00edm jsou odra\u017eeny<\/a><\/noindex> pouze v master v\u011btvi.<\/p>\n

V TightVNC<\/a><\/noindex> (testovala se k\u0159\u00ed\u017eov\u011b platformn\u00ed zastaral\u00e1 v\u011btev 1.3<\/a><\/noindex>, jeliko\u017e aktu\u00e1ln\u00ed verze 2.x je vyd\u00e1v\u00e1na pouze pro Windows), bylo nalezeno 4 zranitelnosti. T\u0159i probl\u00e9my (CVE-2019-15679<\/a><\/noindex>, CVE-2019-15678<\/a><\/noindex>, CVE-2019-8287<\/a><\/noindex>) jsou zp\u016fsobeny p\u0159ete\u010den\u00edm z\u00e1sobn\u00edku ve funkc\u00edch InitialiseRFBConnection, rfbServerCutText a HandleCoRREBBP, a potenci\u00e1ln\u011b mohou v\u00e9st k vykon\u00e1n\u00ed k\u00f3du. Jeden probl\u00e9m (CVE-2019-15680<\/a><\/noindex>) vede k nedostupnosti slu\u017eeb. I kdy\u017e byli v\u00fdvoj\u00e1\u0159i TightVNC informov\u00e1ni<\/a><\/noindex> o probl\u00e9mech informov\u00e1ni ji\u017e minul\u00fd rok, zranitelnosti z\u016fst\u00e1vaj\u00ed neopravena.<\/p>\n

V k\u0159\u00ed\u017eov\u011b platformn\u00edm bal\u00ed\u010dku TurboVNC<\/a><\/noindex> (fork TightVNC 1.3, kter\u00fd pou\u017e\u00edv\u00e1 knihovnu libjpeg-turbo), byla nalezena pouze jedna zranitelnost (CVE-2019-15683<\/a><\/noindex>), ale je nebezpe\u010dn\u00e1 a p\u0159i autentizovan\u00e9m p\u0159\u00edstupu k serveru umo\u017e\u0148uje spustit vlastn\u00ed k\u00f3d, proto\u017ee p\u0159i p\u0159ete\u010den\u00ed z\u00e1sobn\u00edku existuje mo\u017enost kontrolovat adresu n\u00e1vratu. Probl\u00e9m byl odstran\u011bn 23. srpna<\/a><\/noindex> a neobjevuje se v aktu\u00e1ln\u00edm vyd\u00e1n\u00ed 2.2.3<\/a><\/noindex>.<\/p>\n

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

Zdroj: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041f\u0430\u0432\u0435\u043b \u0427\u0435\u0440\u0435\u043c\u0443\u0448\u043a\u0438\u043d \u0438\u0437 \u041b\u0430\u0431\u043e\u0440\u0430\u0442\u043e\u0440\u0438\u0438 \u041a\u0430\u0441\u043f\u0435\u0440\u0441\u043a\u043e\u0433\u043e \u043f\u0440\u043e\u0430\u043d\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043b \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0435 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0433\u043e \u0434\u043e\u0441\u0442\u0443\u043f\u0430 VNC (Virtual Network Computing) \u0438 \u0432\u044b\u044f\u0432\u0438\u043b 37 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0432\u044b\u0437\u0432\u0430\u043d\u043d\u044b\u0445 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430\u043c\u0438 \u043f\u0440\u0438 \u0440\u0430\u0431\u043e\u0442\u0435 \u0441 \u043f\u0430\u043c\u044f\u0442\u044c\u044e. \u0412\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u044b\u0435 \u0432 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f\u0445 VNC-\u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u043c\u043e\u0433\u0443\u0442 \u0431\u044b\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u044b \u0442\u043e\u043b\u044c\u043a\u043e \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u0446\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u043c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u043c, \u0430 \u0430\u0442\u0430\u043a\u0438 \u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u043a\u043b\u0438\u0435\u043d\u0442\u0441\u043a\u043e\u043c \u043a\u043e\u0434\u0435 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u044b \u043f\u0440\u0438 \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f \u043a \u0441\u0435\u0440\u0432\u0435\u0440\u0443, \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0438\u0440\u0443\u0435\u043c\u043e\u043c\u0443 \u0437\u043b\u043e\u0443\u043c\u044b\u0448\u043b\u0435\u043d\u043d\u0438\u043a\u043e\u043c. \u041d\u0430\u0438\u0431\u043e\u043b\u044c\u0448\u0435\u0435 \u0447\u0438\u0441\u043b\u043e \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u043e […]<\/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-53107","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\udd4737 zranitelnost\u00ed v r\u016fzn\u00fdch realizac\u00edch VNC | ProHoster","description":"Pavel \u010ceremu\u0161kin z laborato\u0159e Kaspersky analyzoval r\u016fzn\u00e9 implementace syst\u00e9mu.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/37-uyazvimostej-v-razlichnyh-realizatsiyah-vnc","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","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\udd4737 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0445 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f\u0445 VNC | ProHoster","og:description":"\u041f\u0430\u0432\u0435\u043b \u0427\u0435\u0440\u0435\u043c\u0443\u0448\u043a\u0438\u043d \u0438\u0437 \u041b\u0430\u0431\u043e\u0440\u0430\u0442\u043e\u0440\u0438\u0438 \u041a\u0430\u0441\u043f\u0435\u0440\u0441\u043a\u043e\u0433\u043e \u043f\u0440\u043e\u0430\u043d\u0430\u043b\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043b \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0435 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u044b.","og:url":"https:\/\/prohoster.info\/cs\/blog\/news\/37-uyazvimostej-v-razlichnyh-realizatsiyah-vnc","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":"2019-11-23T21:00:00+00:00","article:modified_time":"2020-02-18T11:00:58+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"53107","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":"2026-01-24 06:07:23","breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-02-28 20:31:28","updated":"2026-01-24 06:07:23","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/53107","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=53107"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/53107\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=53107"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=53107"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=53107"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}