=================================================================== CERT-Renater Note d'Information No. 2022/VULN341 _____________________________________________________________________ DATE : 22/09/2022 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running Grafana versions prior to 9.1.6, 9.0.9, 8.5.13. ====================================================================https://github.com/grafana/grafana/security/advisories/GHSA-p978-56hq-r492 https://github.com/grafana/grafana/security/advisories/GHSA-ff5c-938w-8c9q _____________________________________________________________________ Grafana folders admin only permission privilege escalation Moderate vtorosyan published GHSA-p978-56hq-r492 Package github.com/grafana/grafana (Grafana) Affected versions > =8.5.0 Patched versions 9.1.6, 9.0.9, 8.5.13 Description 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 Release notes Release 9.0.9, only containing security fix: Download Grafana 9.0.9 Release notes Release 8.5.13, only containing security fix: Download Grafana 8.5.13 Release notes Appropriate patches have been applied to Grafana 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 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. 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 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. Severity Moderate 6.4/ 10 CVSS base metrics Attack vector Network Attack complexity High Privileges required Low User interaction None Scope Unchanged Confidentiality High Integrity Low Availability Low CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:L CVE ID CVE-2022-36062 Weaknesses No CWEs _____________________________________________________________________ Escalation from admin to server admin when auth proxy is used Moderate vtorosyan published GHSA-ff5c-938w-8c9q Package github.com/grafana/grafana (Grafana) Affected versions <=9.1.x, <= 8.5.x Patched versions 9.1.6, 9.0.9, 8.5.13 Description 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-2022-35957 that affects Grafana instances which are using Grafana Auth Proxy. Release 9.1.6, latest patch, also containing security fix: Download Grafana 9.1.6 Release notes Release 9.0.9, only containing security fix: Download Grafana 9.0.9 Release notes Release 8.5.13, only containing security fix: Download Grafana 8.5.13 Release notes Appropriate patches have been applied to Grafana 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-2022-35957) Summary On August 9 an internal security review identified a vulnerability in the Grafana which allows an escalation from Admin privileges to Server Admin when Auth proxy authentication is used. Auth proxy allows to authenticate a user by only providing the username (or email) in a X-WEBAUTH-USER HTTP header: the trust assumption is that a front proxy will take care of authentication and that Grafana server is publicly reachable only with this front proxy. Datasource proxy breaks this assumption: it is possible to configure a fake datasource pointing to a localhost Grafana install with a X-WEBAUTH-USER HTTP header containing admin username. This fake datasource can be called publicly via this proxying feature. The CVSS score for this vulnerability is 6.6 Moderate (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H). Impacted versions All Grafana installations where the Auth Proxy is used. Solutions and mitigations To fully address CVE-2022-35957 please upgrade your Grafana instances. They are only required if you are using Auth proxy. If you can’t upgrade, as an alternative, you can deactivate the auth proxy. Appropriate patches have been applied to Grafana Cloud. Timeline Here is a timeline starting from when we originally learned of the issue. 2022-08-09: Vulnerability is reported as a result of an Internal security audit. 2022-08-09: Release timeline determined: 2022-09-06 for private customer release, 2022-09-20 for public release. 2022-08-09: Confirmed that Grafana Cloud is not impacted. 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 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. Severity Moderate 6.6/ 10 CVSS base metrics Attack vector Network Attack complexity High Privileges required High User interaction None Scope Unchanged Confidentiality High Integrity High Availability High CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H CVE ID CVE-2022-35957 Weaknesses CWE-288 ========================================================+ CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =======================================================