{"id":102584,"date":"2021-12-11T15:36:53","date_gmt":"2021-12-11T13:36:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimosti-v-grafana-pozvolyayushhie-poluchit-dostup-k-fajlam-v-sisteme"},"modified":"2021-12-11T15:36:53","modified_gmt":"2021-12-11T13:36:54","slug":"uyazvimosti-v-grafana-pozvolyayushhie-poluchit-dostup-k-fajlam-v-sisteme","status":"publish","type":"post","link":"https:\/\/prohoster.info\/fr\/blog\/news\/uyazvimosti-v-grafana-pozvolyayushhie-poluchit-dostup-k-fajlam-v-sisteme","title":{"rendered":"Vuln\u00e9rabilit\u00e9s dans Grafana permettant d'acc\u00e9der aux fichiers syst\u00e8me","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Une vuln\u00e9rabilit\u00e9 (CVE-2021-43798) a \u00e9t\u00e9 identifi\u00e9e dans la plateforme de visualisation de donn\u00e9es Grafana, permettant de d\u00e9passer le r\u00e9pertoire de base et d'acc\u00e9der \u00e0 des fichiers arbitraires dans le syst\u00e8me de fichiers local du serveur, selon les autorisations de l'utilisateur sous lequel Grafana s'ex\u00e9cute. Ce probl\u00e8me est caus\u00e9 par un dysfonctionnement du gestionnaire de chemins \u00ab \/public\/plugins\/\/ \u00bb, o\u00f9 l'utilisation de caract\u00e8res \u00ab .. \u00bb \u00e9tait autoris\u00e9e pour acc\u00e9der aux r\u00e9pertoires parents. <\/p>\n

La vuln\u00e9rabilit\u00e9 peut \u00eatre exploit\u00e9e en acc\u00e9dant \u00e0 l'URL des plugins pr\u00e9install\u00e9s, tels que \u00ab \/public\/plugins\/graph\/ \u00bb, \u00ab \/public\/plugins\/mysql\/ \u00bb et \u00ab \/public\/plugins\/prometheus\/ \u00bb (environ 40 plugins pr\u00e9install\u00e9s au total). Par exemple, pour acc\u00e9der au fichier \/etc\/passwd, il \u00e9tait possible d'envoyer la requ\u00eate \u00ab \/public\/plugins\/prometheus\/..\/\/..\/\/..\/\/..\/\/..\/\/..\/\/..\/\/..\/\/etc\/passwd \u00bb. Pour d\u00e9tecter des traces d'exploitation, il est recommand\u00e9 de v\u00e9rifier la pr\u00e9sence du masque \u00ab .. \u00bb dans les journaux du serveur HTTP.

\"Vuln\u00e9rabilit\u00e9s<\/center> <\/p>\n

Le probl\u00e8me est apparu \u00e0 partir de la version 8.0.0-beta1 et a \u00e9t\u00e9 corrig\u00e9 dans les versions Grafana 8.3.1, 8.2.7, 8.1.8 et 8.0.7, mais deux autres vuln\u00e9rabilit\u00e9s similaires (CVE-2021-43813, CVE-2021-43815) ont ensuite \u00e9t\u00e9 d\u00e9tect\u00e9es, apparaissant \u00e0 partir des versions Grafana 5.0.0 et Grafana 8.0.0-beta3, permettant \u00e0 un utilisateur authentifi\u00e9 de Grafana d'acc\u00e9der \u00e0 des fichiers arbitraires dans le syst\u00e8me avec les extensions \u00ab .md \u00bb et \u00ab .csv \u00bb (avec des noms de fichiers uniquement en minuscules ou uniquement en majuscules), via la manipulation des caract\u00e8res \u00ab .. \u00bb dans les chemins \u00ab \/api\/plugins\/.* \/markdown\/.* \u00bb et \u00ab \/api\/ds\/query \u00bb. Des mises \u00e0 jour pour corriger ces vuln\u00e9rabilit\u00e9s, Grafana 8.3.2 et 7.5.12, ont \u00e9t\u00e9 publi\u00e9es.
\n
Source : opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c\u0435 \u0432\u0438\u0437\u0443\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 Grafana \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c (CVE-2021-43798), \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0432\u044b\u0439\u0442\u0438 \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u044b \u0431\u0430\u0437\u043e\u0432\u043e\u0433\u043e \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0430 \u0438 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u043b\u044c\u043d\u044b\u043c \u0444\u0430\u0439\u043b\u0430\u043c \u0432 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u0439 \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 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