{"id":111332,"date":"2023-11-06T09:10:14","date_gmt":"2023-11-06T07:10:14","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-ingress-nginx-pozvolyayushhie-skomprometirovat-klastery-kubernetes"},"modified":"2023-11-06T09:10:14","modified_gmt":"2023-11-06T07:10:14","slug":"uyazvimosti-v-ingress-nginx-pozvolyayushhie-skomprometirovat-klastery-kubernetes","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/uyazvimosti-v-ingress-nginx-pozvolyayushhie-skomprometirovat-klastery-kubernetes","title":{"rendered":"Luki w ingress-nginx, kt\u00f3re mog\u0105 skompromitowa\u0107 klastry Kubernetes","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

W rozwijanym projekcie Kubernetes, w kontrolerze ingress-nginx zidentyfikowano trzy podatno\u015bci, kt\u00f3re pozwalaj\u0105 na dost\u0119p do ustawie\u0144 obiektu Ingress w konfiguracji domy\u015blnej, gdzie mi\u0119dzy innymi przechowywane s\u0105 dane uwierzytelniaj\u0105ce do serwer\u00f3w Kubernetes, umo\u017cliwiaj\u0105ce uzyskanie przywilejowanego dost\u0119pu do klastra. Problemy te wyst\u0119puj\u0105 jedynie w kontrolerze ingress-nginx projektu Kubernetes i nie dotycz\u0105 kontrolera kubernetes-ingress, rozwijanego przez programist\u00f3w NGINX. <\/p>\n

Kontroler Ingress pe\u0142ni rol\u0119 bramy i jest u\u017cywany w Kubernetes do organizacji dost\u0119pu z sieci zewn\u0119trznej do us\u0142ug wewn\u0105trz klastra. Kontroler ingress-nginx jest najpopularniejszy i stosuje serwer<\/a> NGINX do przekazywania zapyta\u0144 do klastra, routingu zewn\u0119trznych \u017c\u0105da\u0144 i r\u00f3wnowa\u017cenia obci\u0105\u017cenia. Projekt Kubernetes dostarcza podstawowe kontrolery ingress dla AWS, GCE i nginx, z kt\u00f3rych ostatni nie jest zwi\u0105zany z kontrolerem kubernetes-ingress, kt\u00f3rego wsparciem zajmuje si\u0119 firma F5\/NGINX.

\"Luki<\/center> <\/p>\n

Podatno\u015bci CVE-2023-5043 i CVE-2023-5044 umo\u017cliwiaj\u0105 wykonanie w\u0142asnego kodu na serwerze<\/a> z uprawnieniami procesu kontrolera ingress, wykorzystuj\u0105c do jego podstawienia parametry «nginx.ingress.kubernetes.io\/configuration-snippet» oraz «nginx.ingress.kubernetes.io\/permanent-redirect. Mi\u0119dzy innymi, uzyskane uprawnienia pozwalaj\u0105 na wydobycie tokenu u\u017cywanego do uwierzytelniania na poziomie zarz\u0105dzania klastrem. Luka CVE-2022-4886 umo\u017cliwia omini\u0119cie weryfikacji \u015bcie\u017cek plik\u00f3w, korzystaj\u0105c z dyrektywy log_format. <\/p>\n

Pierwsze dwie luki wyst\u0119puj\u0105 tylko w wersjach ingress-nginx przed wersj\u0105 1.9.0, a ostatnia \u2014 przed wersj\u0105 1.8.0. Aby przeprowadzi\u0107 atak, napastnik musi mie\u0107 dost\u0119p do konfiguracji obiektu ingress, na przyk\u0142ad w klastrach Kubernetes wielou\u017cytkownikowych, gdzie u\u017cytkownicy maj\u0105 mo\u017cliwo\u015b\u0107 tworzenia obiekt\u00f3w w swoim przestrzeni nazw.
\n
\u0179r\u00f3d\u0142o: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u043c \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c Kubernetes ingress-\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u0435 ingress-nginx \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u044b \u0442\u0440\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u0432 \u043a\u043e\u043d\u0444\u0438\u0433\u0443\u0440\u0430\u0446\u0438\u0438 \u043f\u043e \u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u043d\u0430\u0441\u0442\u0440\u043e\u0439\u043a\u0430\u043c \u043e\u0431\u044a\u0435\u043a\u0442\u0430 Ingress, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445, \u0441\u0440\u0435\u0434\u0438 \u043f\u0440\u043e\u0447\u0435\u0433\u043e, \u0445\u0440\u0430\u043d\u044f\u0442\u0441\u044f \u0438 \u0443\u0447\u0451\u0442\u043d\u044b\u0435 \u0434\u0430\u043d\u043d\u044b\u0435 \u0434\u043b\u044f \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u044f \u043a \u0441\u0435\u0440\u0432\u0435\u0440\u0430\u043c Kubernetes, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u043a\u043b\u0430\u0441\u0442\u0435\u0440\u0443. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u043f\u0440\u043e\u044f\u0432\u043b\u044f\u044e\u0442\u0441\u044f \u0442\u043e\u043b\u044c\u043a\u043e \u0432 ingress-\u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440\u0435 ingress-nginx \u043e\u0442 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 Kubernetes \u0438 \u043d\u0435 \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u0435\u0442 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043b\u0435\u0440 kubernetes-ingress, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u044b\u0439 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430\u043c\u0438 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":111333,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-111332","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\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\udd47Podatno\u015bci w ingress-nginx, kt\u00f3re pozwalaj\u0105 na skompromitowanie klastr\u00f3w Kubernetes | ProHoster","description":"W rozwijanym projekcie Kubernetes, w kontrolerze ingress-nginx zidentyfikowano trzy podatno\u015bci, kt\u00f3re pozwalaj\u0105 na dost\u0119p do ustawie\u0144 obiektu Ingress w konfiguracji domy\u015blnej, gdzie mi\u0119dzy innymi przechowywane s\u0105 i.","canonical_url":"https:\/\/prohoster.info\/pl\/blog\/news\/uyazvimosti-v-ingress-nginx-pozvolyayushhie-skomprometirovat-klastery-kubernetes","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"pl_PL","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 ingress-nginx, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 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