Grafana is a popular open-source platform used for monitoring, visualization, and improving observability in software systems. Unfortunately, a recent vulnerability has been discovered in Grafana that affects user authorization, opening the door to unauthorized data access. The vulnerability has been assigned CVE-2022-21713, and several affected API endpoints have been identified.

In this post, we'll discuss the security implications of CVE-2022-21713 in detail, provide code snippets to demonstrate the vulnerability, and link to the original references. You are advised to upgrade your Grafana instance to the latest version as soon as possible to mitigate this vulnerability.

The following Grafana API endpoints are affected by CVE-2022-21713

1. /teams/:teamId
2. /teams/:search
3. /teams/:teamId/members (when editors_can_admin flag is enabled)

These endpoints do not properly handle user authorization, allowing an authenticated attacker access to unintended data.

Exploit Details

An attacker exploiting CVE-2022-21713 can view data about teams that they are not authorized to access. Below is a brief overview of how each endpoint can be exploited:

1. /teams/:teamId: An attacker can query a specific team ID and view the team's details, even if they do not have proper access to that team.

Code snippet

GET /api/teams/123

2. /teams/:search: An attacker can search for teams and see the total number of teams, even those they shouldn't have access to.

Code snippet

GET /api/teams/search?query=example

3. /teams/:teamId/members: When the editors_can_admin flag is enabled, an attacker can view the members of a team they should not have access to by querying for its specific team ID.

Code snippet

GET /api/teams/123/members

Mitigation and Upgrading

There are no known workarounds for this issue. Users are strongly advised to upgrade their Grafana instances to the latest version as soon as possible to avoid unauthorized data access. The Grafana team has addressed the vulnerability in version [insert version number], and the patches are available for download from the official website.

Learn more about Grafana and CVE-2022-21713 from the following resources

1. Grafana Official Website: https://grafana.com/
2. CVE-2022-21713 Official Record: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-21713
3. Grafana Security Advisory: https://grafana.com/docs/grafana/latest/alerts/alerts/#security-advisories

Conclusion

CVE-2022-21713 exposes a significant security flaw in Grafana by allowing unauthorized access to team data via certain API endpoints. Protect your data and your users by upgrading Grafana to the latest version as soon as possible. Stay vigilant and informed about potential security threats by reviewing the various resources linked above.

Timeline

Published on: 02/08/2022 21:15:00 UTC
Last modified on: 05/07/2022 08:15:00 UTC