PT-2021-21145 · Grafana · Grafana Cortex

Christian Simon + 1 · Published 2021-08-03 · Updated 2021-09-02 · CVE-2021-36157

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Name of the Vulnerable Software and Affected Versions: Grafana Cortex versions through 1.9.0

Description: An issue was discovered where the header value X-Scope-OrgID is used to construct file paths for rules files. If this value is crafted to conduct directory traversal, such as ../../sensitive/path/in/deployment, 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, potentially tricking the ingester into writing metrics to a different location, although the effect is more of a nuisance than information disclosure.

Recommendations: For versions through 1.9.0, consider restricting the use of the X-Scope-OrgID header to prevent directory traversal attacks until a patch is available. Additionally, restrict access to sensitive paths and monitor API requests for malicious OrgID headers to minimize the risk of exploitation.

Fix

Path traversal

Weakness Enumeration

CWE-22

Related Identifiers

CVE-2021-36157

GHSA-JPHM-G89M-V42P

Affected Products

Grafana Cortex

References · 8

• https://github.com/cortexproject/cortex/pull/4375 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-36157 · Security Note
• https://grafana.com/docs/grafana/latest/release-notes · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-36157 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-jphm-g89m-v42p · Vendor Advisory
• https://github.com/cortexproject/cortex · Note
• https://github.com/cortexproject/cortex/commit/d9e1f81f40c607b9e97c2fc6db70ae54679917c4 · Note
• https://t.me/cibsecurity/26739 · Telegram Post