CVE-2022-36062

Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Grafana ausnutzen, um seine Privilegien zu erhöhen.

Today we are releasing Grafana 9.1.6, 9.0.9, 8.5.13. This patch release includes a Moderate severity security fix for CVE-2022-36062 that affects Grafana instances which are using Grafana role-based access control (RBAC). Release 9.1.6, latest patch, also containing security fix: - [Download Grafana 9.1.6](https://grafana.com/grafana/download/9.1.6) - [Release notes](https://grafana.com/docs/grafana/latest/release-notes/release-notes-9-1-6/) Release 9.0.9, only containing security fix: - [Download Grafana 9.0.9](https://grafana.com/grafana/download/9.0.9) - [Release notes](https://grafana.com/docs/grafana/latest/release-notes/release-notes-9-0-9/) Release 8.5.13, only containing security fix: - [Download Grafana 8.5.13](https://grafana.com/grafana/download/8.5.13) - [Release notes](https://grafana.com/docs/grafana/latest/release-notes/release-notes-8-5-13/) Appropriate patches have been applied to [Grafana Cloud](https://grafana.com/cloud) and as always, we closely coordinated with all cloud providers licensed to offer Grafana Pro. They have received early notification under embargo and confirmed that their offerings are secure at the time of this announcement. This is applicable to Amazon Managed Grafana and Azure's Grafana as a service offering. ## Privilege escalation (CVE-2022-36062) ### Summary On August 29 we have received a bug report for Grafana role-based access control (RBAC) and confirmed a vulnerability in the Grafana. This vulnerability impacts folders/dashboards with Admin only permissions and where RBAC was ever enabled at least once. When RBAC is enabled, Grafana runs migrations which translate legacy access control permissions into RBAC permissions. The migrations contain a bug, which grants additional access to folders/dashboards which only had Admin role grant, resulting in a privilege escalation where Editors can edit and Viewers can view the folder/dashboard which they should not have access to. The CVSS score for this vulnerability is 6.4 Moderate (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L). ### Impacted versions All Grafana installations where the [RBAC](https://grafana.com/docs/grafana/latest/administration/roles-and-permissions/access-control/) was at least enabled once and there are folders/dashboards with only Admin grant. ### Solutions and mitigations To fully address CVE-2022-36062 please upgrade your Grafana instances. They are only required if you have ever enabled RBAC and have dashboards/folders where Admin is the only permission.. If you can’t upgrade, as a workaround when impacted folder/dashboard is known, the additional permissions can be removed manually. Appropriate patches have been applied to [Grafana Cloud](https://grafana.com/cloud). ### Timeline Here is a timeline starting from when we originally learned of the issue. * 2022-08-27: External report received about a bug in Grafana role-based access control. * 2022-08-30: The bug is confirmed as a vulnerability. * 2022-08-31: Mitigation is applied to Grafana Cloud. * 2022-08-31: Release timeline determined: 2022-09-06 for private customer release, 2022-09-20 for public release. * 2022-09-06: Private release. * 2022-09-20: Public release. ## Reporting security issues If you think you have found a security vulnerability, please send a report to security@grafana.com. This address can be used for all of Grafana Labs' open source and commercial products (including, but not limited to Grafana, Grafana Cloud, Grafana Enterprise, and grafana.com). We can accept only vulnerability reports at this address. We would prefer that you encrypt your message to us by using our PGP key. The key fingerprint is F988 7BEA 027A 049F AE8E 5CAA D125 8932 BE24 C5CA The key is available from keyserver.ubuntu.com. ## Security announcements We maintain a [security category](https://community.grafana.com/c/support/security-announcements) on our blog, where we will always post a summary, remediation, and mitigation details for any patch containing security fixes. You can also subscribe to our [RSS feed](https://grafana.com/tags/security/index.xml).

Grafana is an open-source platform for monitoring and observability. In versions prior to 8.5.13, 9.0.9, and 9.1.6, Grafana is subject to Improper Preservation of Permissions resulting in privilege escalation on some folders where Admin is the only used permission. The vulnerability impacts Grafana instances where RBAC was disabled and enabled afterwards, as the migrations which are translating legacy folder permissions to RBAC permissions do not account for the scenario where the only user permission in the folder is Admin, as a result RBAC adds permissions for Editors and Viewers which allow them to edit and view folders accordingly. This issue has been patched in versions 8.5.13, 9.0.9, and 9.1.6. A workaround when the impacted folder/dashboard is known is to remove the additional permissions manually.

Grafana folders admin only permission privilege escalation in github.com/grafana/grafana. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/grafana/grafana from v8.5.0 before v8.5.13, from v9.0.0 before v9.0.9, from v9.1.0 before v9.1.6.