CVE-2021-43813 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Reference

https://github.com/grafana/grafana/commit/fd48aee61e4328aae8d5303a9efd045fa0ca308d https://grafana.com/blog/2021/12/10/grafana-8.3.2-and-7.5.12-released-with-moderate-severity-security-fix/ https://github.com/grafana/grafana/security/advisories/GHSA-c3q8-26ph-9g2q https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-5-12/ https://grafana.com/docs/grafana/latest/release-notes/release-notes-8-3-2/ https://github.com/github/securitylab-vulnerabilities/commit/689fc5d9fd665be4d5bba200a6a433b532172d0f http://www.openwall.com/lists/oss-security/2021/12/10/4 https://security.netapp.com/advisory/ntap-20220107-0006/ 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.

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

4.3