Vulnerability · Published Aug 3, 2021 · Assigned by mitre

CVE-2021-36157

Medium 5.3

In plain English

A medium-severity security flaw in the github.com/cortexproject/cortex package (Go). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 72% of all known vulnerabilities).

Severity (CVSS NVD)5.3Medium

Exploit odds (30 days)1.4%top 27.5% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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.)

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/cortexproject/cortex	no fix listed	GHSA-jphm-g89m-v42p

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

https://grafana.com/docs/grafana/latest/release-notes/ x_refsource_MISC
https://github.com/cortexproject/cortex/pull/4375 x_refsource_MISC