Vulnerability CVE-2021-43815
Published: 2021-12-10

Description:
Grafana is an open-source platform for monitoring and observability. Grafana prior to versions 8.3.2 and 7.5.12 has a directory traversal for arbitrary .csv files. It only affects instances that have the developer testing tool called TestData DB data source enabled and configured. The vulnerability is limited in scope, and only allows access to files with the extension .csv to authenticated users only. Grafana Cloud instances have not been affected by the vulnerability. Versions 8.3.2 and 7.5.12 contain a patch for this issue. There is a workaround available 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.

Type:

CWE-22

 (Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'))

CVSS2 => (AV:N/AC:M/Au:S/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
3.5/10
2.9/10
6.8/10
Exploit range
Attack complexity
Authentication
Remote
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Grafana -> Grafana 

 References:
https://github.com/grafana/grafana/security/advisories/GHSA-7533-c8qv-jm9m
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/commit/d6ec6f8ad28f0212e584406730f939105ff6c6d3
https://github.com/grafana/grafana/releases/tag/v8.3.2
http://www.openwall.com/lists/oss-security/2021/12/10/4
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