CVE-2021-36156: Path Traversal
First published: Tue Aug 03 2021(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Grafana Loki | <=2.2.1 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID of this issue in Grafana Loki?
The vulnerability ID of this issue in Grafana Loki is CVE-2021-36156.
What is the severity of CVE-2021-36156?
The severity of CVE-2021-36156 is medium with a CVSS score of 5.3.
What is the affected software version of CVE-2021-36156?
The affected software version of CVE-2021-36156 is Grafana Loki up to and including version 2.2.1.
How can an attacker exploit CVE-2021-36156?
An attacker can exploit CVE-2021-36156 by crafting a malicious X-Scope-OrgID header value to conduct directory traversal and attempt to parse rules files from sensitive locations.
How can I mitigate CVE-2021-36156?
To mitigate CVE-2021-36156, update to Grafana Loki version 2.3.0 or later.
- collector/nvd-index
- agent/tags
- agent/event
- agent/severity
- agent/references
- agent/weakness
- agent/author
- agent/description
- agent/type
- agent/remedy
- agent/softwarecombine
- agent/first-publish-date
- agent/last-modified-date
- collector/mitre-cve
- source/MITRE
- vendor/grafana
- canonical/grafana loki
- version/grafana loki/2.2.1