{"id":37292,"date":"2019-10-31T22:16:49","date_gmt":"2019-10-31T19:16:49","guid":{"rendered":"https:\/\/prohoster.info\/blog\/v-webmin-najden-bekdor-pozvolyayushhij-udalyonno-poluchit-dostup-s-pravami-root\/"},"modified":"2019-10-31T22:16:49","modified_gmt":"2019-10-31T19:16:49","slug":"v-webmin-najden-bekdor-pozvolyayushhij-udalyonno-poluchit-dostup-s-pravami-root","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/v-webmin-najden-bekdor-pozvolyayushhij-udalyonno-poluchit-dostup-s-pravami-root","title":{"rendered":"A Webmin-ben h\u00e1ts\u00f3ajt\u00f3t tal\u00e1ltak, amely lehet\u0151v\u00e9 teszi a t\u00e1voli root hozz\u00e1f\u00e9r\u00e9st","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A csomagban Webmin<\/a><\/noindex>, amely t\u00e1voli szerverkezel\u00e9st biztos\u00edt, felfedezve<\/a><\/noindex> h\u00e1ts\u00f3ajt\u00f3 (CVE-2019-15107<\/a><\/noindex>), amelyet a projekt hivatalos verzi\u00f3iban \u00e9szleltek, melyek<\/a><\/noindex> a Sourceforge-on kereszt\u00fcl terjednek \u00e9s az aj\u00e1nlott<\/a><\/noindex> a f\u0151oldalon. A h\u00e1ts\u00f3ajt\u00f3 a 1.882 \u00e9s 1.921 k\u00f6z\u00f6tti verzi\u00f3kban volt jelen (a git-repozit\u00f3riumban a h\u00e1ts\u00f3ajt\u00f3s k\u00f3d nem volt megtal\u00e1lhat\u00f3), \u00e9s lehet\u0151v\u00e9 tette, hogy jogosults\u00e1gok n\u00e9lk\u00fcl v\u00e9gezzenek el tetsz\u0151leges shell-parancsokat a rendszerben root jogokkal. <\/p>\n

A t\u00e1mad\u00e1shoz elegend\u0151, ha nyitott h\u00e1l\u00f3zati port van a Webmin-nel, \u00e9s akt\u00edv a webes fel\u00fcleten az elavult jelsz\u00f3 cser\u00e9j\u00e9nek funkci\u00f3ja (alap\u00e9rtelmez\u00e9s szerint a 1.890-es verzi\u00f3kban be van kapcsolva, de a t\u00f6bbi verzi\u00f3ban ki van kapcsolva). A probl\u00e9ma eliminates<\/a><\/noindex> be. friss\u00edt\u00e9s<\/a><\/noindex> 1.930. Ideiglenes int\u00e9zked\u00e9sk\u00e9nt a h\u00e1ts\u00f3 ajt\u00f3 blokkol\u00e1s\u00e1hoz elegend\u0151 elt\u00e1vol\u00edtani a \"passwd_mode=\" be\u00e1ll\u00edt\u00e1st a konfigur\u00e1ci\u00f3s f\u00e1jlb\u00f3l \/etc\/webmin\/miniserv.conf. A tesztel\u00e9shez el\u0151k\u00e9sz\u00edtett exploitat<\/a><\/noindex>.<\/p>\n

A probl\u00e9ma a password_change.cgi szkriptben tal\u00e1lhat\u00f3, amelyben a webform\u00e1n megadott r\u00e9gi jelsz\u00f3 ellen\u0151rz\u00e9s\u00e9hez<\/a><\/noindex> a unix_crypt funkci\u00f3t haszn\u00e1lj\u00e1k, amelynek a felhaszn\u00e1l\u00f3t\u00f3l kapott jelsz\u00f3t tov\u00e1bb\u00edtj\u00e1k speci\u00e1lis karakterek escape-el\u00e9se n\u00e9lk\u00fcl. A git-repozit\u00f3riumban ez a funkci\u00f3 haszn\u00e1lj\u00e1k<\/a><\/noindex> a Crypt::UnixCrypt modul f\u00f6l\u00f6tti burkolatban tal\u00e1lhat\u00f3, \u00e9s nem jelent vesz\u00e9lyt, de a Sourceforge-on el\u00e9rhet\u0151 k\u00f3darch\u00edvumban egy olyan k\u00f3dot h\u00edvnak meg, amely k\u00f6zvetlen\u00fcl el\u00e9ri a \/etc\/shadow-t, de ezt shell-konstrukci\u00f3val v\u00e9gzi. A t\u00e1mad\u00e1shoz elegend\u0151 a r\u00e9gi jelsz\u00f3 mez\u0151j\u00e9be \"|\" karaktert be\u00edrni, \u00e9s a m\u00f6g\u00f6tte l\u00e9v\u0151 k\u00f3d root jogokkal fog v\u00e9grehajt\u00f3dni a szerveren. egy<\/a><\/noindex> a Crypt::UnixCrypt modul feletti r\u00e9teg, \u00e9s nem jelent vesz\u00e9lyt, de a Sourceforge weboldalon tal\u00e1lhat\u00f3 k\u00f3dt\u00e1rban olyan k\u00f3dot h\u00edvnak meg, amely k\u00f6zvetlen\u00fcl az \/etc\/shadow f\u00e1jlhoz f\u00e9r hozz\u00e1, de ezt shell- konstrukci\u00f3val teszi. A t\u00e1mad\u00e1shoz elegend\u0151 be\u00edrni a r\u00e9gi jelsz\u00f3 mez\u0151be a \"|\" karaktert, \u00e9s a m\u00f6g\u00f6tte l\u00e9v\u0151 k\u00f3d root jogokkal fog futni a szerveren.<\/p>\n

A Jelenleg az \u00f6sszes let\u00f6lt\u00e9si arch\u00edvumot \u00fajra\u00e9p\u00edtett\u00e9k a Git-b\u0151l.<\/a><\/noindex> A Runtu XFCE 18.04.3 disztrib\u00faci\u00f3 kiad\u00e1sa A Webmin csomagban, amely t\u00e1voli szerverkezel\u00e9st biztos\u00edt,<\/a><\/noindex>\ud83e\udd47A Webmin-ben h\u00e1ts\u00f3ajt\u00f3t tal\u00e1ltak, amely lehet\u0151v\u00e9 teszi a t\u00e1voli root hozz\u00e1f\u00e9r\u00e9st | ProHoster<\/p>\n

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

Forr\u00e1s: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043f\u0430\u043a\u0435\u0442\u0435 Webmin, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u043c \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430 \u0434\u043b\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0433\u043e \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u043c, \u0432\u044b\u044f\u0432\u043b\u0435\u043d \u0431\u044d\u043a\u0434\u043e\u0440 (CVE-2019-15107), \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0435\u043d\u043d\u044b\u0439 \u0432 \u043e\u0444\u0438\u0446\u0438\u0430\u043b\u044c\u043d\u044b\u0445 \u0441\u0431\u043e\u0440\u043a\u0430\u0445 \u043f\u0440\u043e\u0435\u043a\u0442\u0430, \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u043c\u044b\u0445 \u0447\u0435\u0440\u0435\u0437 Sourceforge \u0438 \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u043e\u0432\u0430\u043d\u043d\u044b\u0445 \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u043c \u0441\u0430\u0439\u0442\u0435. \u0411\u044d\u043a\u0434\u043e\u0440 \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u043e\u0432\u0430\u043b \u0432 \u0441\u0431\u043e\u0440\u043a\u0430\u0445 \u0441 1.882 \u043f\u043e 1.921 \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e (\u0432 git-\u0440\u0435\u043f\u043e\u0437\u0438\u0442\u043e\u0440\u0438\u0438 \u043a\u043e\u0434 \u0441 \u0431\u044d\u043a\u0434\u043e\u0440\u043e\u043c \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u043e\u0432\u0430\u043b) \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u043b \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0431\u0435\u0437 \u043f\u0440\u043e\u0445\u043e\u0436\u0434\u0435\u043d\u0438\u044f \u0430\u0443\u0442\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u0435 shell-\u043a\u043e\u043c\u0430\u043d\u0434\u044b \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root. \u0414\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-37292","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 Webmin-ben h\u00e1ts\u00f3ajt\u00f3t tal\u00e1ltak, amely lehet\u0151v\u00e9 teszi a t\u00e1voli root hozz\u00e1f\u00e9r\u00e9st | ProHoster","description":"A Webmin csomagban, amely t\u00e1voli szerverkezel\u00e9st biztos\u00edt,","canonical_url":"https:\/\/prohoster.info\/hu\/blog\/news\/v-webmin-najden-bekdor-pozvolyayushhij-udalyonno-poluchit-dostup-s-pravami-root","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"hu_HU","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\u0412 Webmin \u043d\u0430\u0439\u0434\u0435\u043d \u0431\u044d\u043a\u0434\u043e\u0440, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0439 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root | ProHoster","og:description":"\u0412 \u043f\u0430\u043a\u0435\u0442\u0435 Webmin, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0435\u043c \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430 \u0434\u043b\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0433\u043e \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u043c,","og:url":"https:\/\/prohoster.info\/hu\/blog\/news\/v-webmin-najden-bekdor-pozvolyayushhij-udalyonno-poluchit-dostup-s-pravami-root","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":"2019-10-31T19:16:49+00:00","article:modified_time":"2019-10-31T19:16:49+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"37292","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":"2026-01-23 17:08:31","breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-03-01 01:29:59","updated":"2026-01-23 17:08:31","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/37292","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/comments?post=37292"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/posts\/37292\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/media?parent=37292"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/categories?post=37292"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/hu\/wp-json\/wp\/v2\/tags?post=37292"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}