{"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\/nl\/blog\/news\/uyazvimosti-v-grafana-pozvolyayushhie-poluchit-dostup-k-fajlam-v-sisteme","title":{"rendered":"Vulnerabilities in Grafana allowing access to files in the system","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

In het open data visualisatieplatform Grafana is een kwetsbaarheid (CVE-2021-43798) vastgesteld, waarmee men buiten de basisdirectory kan komen en toegang kan krijgen tot willekeurige bestanden in het lokale bestandssysteem van de server, afhankelijk van de toegangsrechten van de gebruiker onder wie Grafana draait. Het probleem wordt veroorzaakt door een onjuiste werking van de padverwerker voor \"\\\/public\\\/plugins\\\/\\\/\" waar het gebruik van de symbolen \"..\" was toegestaan om toegang te krijgen tot onderliggende mappen. <\/p>\n

Kwetsbaarheid kan worden ge\u00ebxploiteerd via toegang tot URL's van vooraf ge\u00efnstalleerde plugins, zoals 'public\/plugins\/graph\/', 'public\/plugins\/mysql\/' en 'public\/plugins\/prometheus\/' (in totaal zijn er ongeveer 40 plugins ge\u00efnstalleerd). Bijvoorbeeld, om toegang te krijgen tot het bestand \/etc\/passwd, kon het verzoek 'public\/plugins\/prometheus\/..\/..\/..\/..\/..\/..\/etc\/passwd' worden verzonden. Om sporen van exploitatie te identificeren, wordt aangeraden om te controleren op het patroon '..' in de http-serverlogs.

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

Het probleem deed zich voor vanaf versie 8.0.0-beta1 en is opgelost in de releases van Grafana 8.3.1, 8.2.7, 8.1.8 en 8.0.7, maar later zijn er nog twee soortgelijke kwetsbaarheden ontdekt (CVE-2021-43813, CVE-2021-43815) die zich voordeden vanaf de versies Grafana 5.0.0 en Grafana 8.0.0-beta3, en waarmee een geauthenticeerde gebruiker van Grafana toegang kon krijgen tot willekeurige bestanden in het systeem met de extensies \".md\" en \".csv\" (met bestandsnamen alleen in kleine of alleen in hoofdletters), door te manipuleren met de symbolen \"..\" in de paden \"\\\/api\\\/plugins\\\/.\\\/markdown\\\/.\" en \"\\\/api\\\/ds\\\/query\". Voor de oplossing van deze kwetsbaarheden zijn updates van Grafana 8.3.2 en 7.5.12 beschikbaar gesteld.
\n
Bron: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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