CVE-2021-43813 Directory Traversal in Grafana

2021-12-1017:30:12

CWE-22

GitHub_M

www.cve.org

grafana

directory traversal

vulnerability

security patch

authentication

proxy

mitigation

url encoding

CVSS3

4.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

AI Score

5.9

Confidence

High

EPSS

0.012

Percentile

85.0%

JSON

Grafana is an open-source platform for monitoring and observability. Grafana prior to versions 8.3.2 and 7.5.12 contains a directory traversal vulnerability for fully lowercase or fully uppercase .md files. The vulnerability is limited in scope, and only allows access to files with the extension .md to authenticated users only. Grafana Cloud instances have not been affected by the vulnerability. Users should upgrade to patched versions 8.3.2 or 7.5.12. For users who cannot upgrade, running a reverse proxy in front of Grafana that normalizes the PATH of the request will mitigate the vulnerability. The proxy will have to also be able to handle url encoded paths. Alternatively, for fully lowercase or fully uppercase .md files, users can block /api/plugins/./markdown/. without losing any functionality beyond inlined plugin help text.

CNA Affected

[
  {
    "product": "grafana",
    "vendor": "grafana",
    "versions": [
      {
        "status": "affected",
        "version": ">= 5.0.0, < 7.5.12"
      },
      {
        "status": "affected",
        "version": ">= 8.0.0, < 8.3.2"
      }
    ]
  }
]