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.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
| Link | Tags |
|---|---|
| https://github.com/grafana/grafana/security/advisories/GHSA-c3q8-26ph-9g2q | patch third party advisory release notes |
| https://github.com/github/securitylab-vulnerabilities/commit/689fc5d9fd665be4d5bba200a6a433b532172d0f | broken link |
| https://github.com/grafana/grafana/commit/fd48aee61e4328aae8d5303a9efd045fa0ca308d | third party advisory patch |
| https://grafana.com/blog/2021/12/10/grafana-8.3.2-and-7.5.12-released-with-moderate-severity-security-fix/ | patch vendor advisory release notes |
| https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-5-12/ | release notes vendor advisory |
| https://grafana.com/docs/grafana/latest/release-notes/release-notes-8-3-2/ | release notes vendor advisory |
| http://www.openwall.com/lists/oss-security/2021/12/10/4 | patch mailing list release notes third party advisory |
| https://security.netapp.com/advisory/ntap-20220107-0006/ | third party advisory |