CVE-2021-43813

Directory Traversal in Grafana

Severity Score

4.3

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Grafana es una plataforma de código abierto para la monitorización y la observabilidad. Grafana versiones anteriores a 8.3.2 y 7.5.12, contiene una vulnerabilidad de salto de directorio para archivos .md completamente en minúsculas o en mayúsculas. La vulnerabilidad presenta un alcance limitado y sólo permite el acceso a los archivos con la extensión .md a usuarios autentificados. Las instancias de Grafana Cloud no han sido afectadas por la vulnerabilidad. Los usuarios deben actualizar a las versiones parcheadas 8.3.2 o 7.5.12. Para usuarios que no puedan actualizar, la ejecución de un proxy inverso frente a Grafana que normalice el PATH de la petición mitigará la vulnerabilidad. El proxy también tendrá que ser capaz de manejar rutas codificadas con url. Alternativamente, para archivos .md completamente en minúsculas o en mayúsculas, los usuarios pueden bloquear /api/plugins/.*/markdown/.* sin perder ninguna funcionalidad más allá del texto de ayuda del plugin alineado

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-11-16 CVE Reserved
2021-12-10 CVE Published
2023-07-03 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CAPEC

References (10)

URL	Tag	Source
https://github.com/github/securitylab-vulnerabilities/commit/689fc5d9fd665be4d5bba200a6a433b532172d0f	Broken Link
https://security.netapp.com/advisory/ntap-20220107-0006	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
http://www.openwall.com/lists/oss-security/2021/12/10/4	2022-03-31
https://github.com/grafana/grafana/commit/fd48aee61e4328aae8d5303a9efd045fa0ca308d	2022-03-31
https://github.com/grafana/grafana/security/advisories/GHSA-c3q8-26ph-9g2q	2022-03-31
https://grafana.com/blog/2021/12/10/grafana-8.3.2-and-7.5.12-released-with-moderate-severity-security-fix	2022-03-31

URL	Date	SRC
https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-5-12	2022-03-31
https://grafana.com/docs/grafana/latest/release-notes/release-notes-8-3-2	2022-03-31
https://access.redhat.com/security/cve/CVE-2021-43813	2022-08-09
https://bugzilla.redhat.com/show_bug.cgi?id=2031228	2022-08-09

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Grafana Search vendor "Grafana"		Grafana Search vendor "Grafana" for product "Grafana"				>= 5.0.0 < 7.5.12 Search vendor "Grafana" for product "Grafana" and version " >= 5.0.0 < 7.5.12"		-		Affected
Grafana Search vendor "Grafana"		Grafana Search vendor "Grafana" for product "Grafana"				>= 8.0.0 < 8.3.2 Search vendor "Grafana" for product "Grafana" and version " >= 8.0.0 < 8.3.2"		-		Affected