Related Vulnerabilities: CVE-2021-36156  

An issue was discovered in Grafana Loki through 2.2.1. The header value X-Scope-OrgID is used to construct file paths for rules files, and if crafted to conduct directory traversal such as a ../../sensitive/path/in/deployment pathname, then Loki will attempt to parse a rules file at that location and include some of the contents in the error message.

Severity Medium

Remote Yes

Type Directory traversal

Description

An issue was discovered in Grafana Loki through 2.2.1. The header value X-Scope-OrgID is used to construct file paths for rules files, and if crafted to conduct directory traversal such as a ../../sensitive/path/in/deployment pathname, then Loki will attempt to parse a rules file at that location and include some of the contents in the error message.

AVG-2250 loki 2.2.1-3 Medium Vulnerable

https://github.com/grafana/loki/pull/4020
https://github.com/grafana/loki/commit/2fd633cded9a97c8c6b29160549a157678d1fa2f