CVE-2021-36156

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 ae ../../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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.40%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/grafana/loki/pull/4020#issue-694377133 issue tracking third party advisory
https://github.com/grafana/loki/releases/tag/v2.3.0 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-36156?
CVE-2021-36156 has been scored as a medium severity vulnerability.
How to fix CVE-2021-36156?
To fix CVE-2021-36156, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-36156 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-36156 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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