Vulnerability Description
An issue was discovered in Grafana Cortex through 1.9.0. 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 Cortex will attempt to parse a rules file at that location and include some of the contents in the error message. (Other Cortex API requests can also be sent a malicious OrgID header, e.g., tricking the ingester into writing metrics to a different location, but the effect is nuisance rather than information disclosure.)
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linuxfoundation | Cortex | <= 1.9.0 |
Related Weaknesses (CWE)
References
- https://github.com/cortexproject/cortex/pull/4375PatchThird Party Advisory
- https://grafana.com/docs/grafana/latest/release-notes/Release NotesVendor Advisory
- https://github.com/cortexproject/cortex/pull/4375PatchThird Party Advisory
- https://grafana.com/docs/grafana/latest/release-notes/Release NotesVendor Advisory
FAQ
What is CVE-2021-36157?
CVE-2021-36157 is a vulnerability with a CVSS score of 5.3 (MEDIUM). An issue was discovered in Grafana Cortex through 1.9.0. 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 ../../...
How severe is CVE-2021-36157?
CVE-2021-36157 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-36157?
Check the references section above for vendor advisories and patch information. Affected products include: Linuxfoundation Cortex.