HTTP: Grafana Labs Grafana Directory Traversal

This signature detects attempts to exploit a known vulnerability against Grafana Labs Grafana. A successful attack can lead to sensitive information disclosure.

Extended Description

Grafana is an open-source platform for monitoring and observability. Grafana prior to versions 8.3.2 and 7.5.12 contains a directory traversal vulnerability for fully lowercase or fully uppercase .md files. The vulnerability is limited in scope, and only allows access to files with the extension .md to authenticated users only. Grafana Cloud instances have not been affected by the vulnerability. Users should upgrade to patched versions 8.3.2 or 7.5.12. For users who cannot upgrade, running a reverse proxy in front of Grafana that normalizes the PATH of the request will mitigate the vulnerability. The proxy will have to also be able to handle url encoded paths. Alternatively, for fully lowercase or fully uppercase .md files, users can block /api/plugins/.*/markdown/.* without losing any functionality beyond inlined plugin help text.

Affected Products

Grafana grafana

References

CVE: CVE-2021-43813

URL: https://grafana.com/blog/2021/12/10/grafana-8.3.2-and-7.5.12-released-with-moderate-severity-security-fix/ https://securitylab.github.com/advisories/GHSL-2021-1053_Grafana/

Short Name

HTTP:DIR:GRAFANA-LABS-ID

Severity

Minor

Recommended

False

Recommended Action

Drop

HTTP: Grafana Labs Grafana Directory Traversal

Extended Description

Affected Products

References

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