Main Vulnerability Database Vulnerabilities #VU64412

Path traversal in Loki - CVE-2021-36156

Published: June 15, 2022

Vulnerability identifier: #VU64412

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-36156

CWE-ID: CWE-22

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when header value X-Scope-OrgID is used to construct file paths for rules files. A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Affected software

Loki
Arch Linux
loki

How to mitigate CVE-2021-36156

Install update from vendor's website.

Loki - update to 2.3.0
loki - update to 2.3.0-1

External References

https://github.com/grafana/loki/pull/4020#issue-694377133
https://github.com/grafana/loki/releases/tag/v2.3.0

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