Headline
GHSA-cmf4-h3xc-jw8w: Grafana Cross Site Request Forgery (CSRF)
Today we are releasing Grafana 8.3.5 and 7.5.15. This patch release includes MEDIUM severity security fix for Cross Site Request Forgery for Grafana.
Release v.8.3.5, only containing security fixes:
Release v.7.5.15, only containing security fixes:
CSRF (CVE-2022-21703)
Summary
On Jan. 18, security researchers jub0bs and abrahack contacted Grafana to disclose a CSRF vulnerability which allows anonymous attackers to elevate their privileges by mounting cross-origin attacks against authenticated high-privilege Grafana users (for example, Editors or Admins).
We believe that this vulnerability is rated at CVSS 6.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N).
Impact
An attacker can exploit this vulnerability for privilege escalation by tricking an authenticated user into inviting the attacker as a new user with high privileges.
Affected versions with MEDIUM severity
All Grafana >=3.0-beta1 versions are affected by this vulnerability.
Solutions and mitigations
All installations after Grafana v3.0-beta1 should be upgraded as soon as possible.
Note that if you are running Grafana behind any reverse proxy, you need to make sure that you are passing the original Host and Origin headers from the client request to Grafana.
In the case of Apache Server, you need to add ProxyPreserveHost on in your proxy configuration. In case of NGINX, you can need to add proxy_set_header Host $http_host; in your configuration.
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.
Timeline and postmortem
Here is a detailed timeline starting from when we originally learned of the issue. All times in UTC.
- 2022-01-18 03:00 Issue submitted by external researchers
- 2022-01-18 17:25 Vulnerability confirmed reproducible
- 2022-01-19 07:40 CVSS score confirmed 6.8 at maximum and MEDIUM impact
- 2022-01-19 07:40 Begin mitigation for Grafana Cloud
- 2022-01-19 17:00 CVE requested
- 2022-01-19 19:50 GitHub issues CVE-2022-21703
- 2022-01-21 10:50 PR with fix opened
- 2022-01-21 14:13 Private release planned for 2022-01-25, and public release planned for 2022-02-01.
- 2022-01-25 12:00 Private release
- 2022-02-01 12:00 During the public release process, we realized that private 7.x release was incomplete. Abort public release, send second private release to customers using 7.x
- 2022-02-08 12:00 Public release
Acknowledgement
We would like to thank jub0bs and abrahack for responsibly disclosing the vulnerability.
Reporting security issues
If you think you have found a security vulnerability, please send a report to [email protected]. 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.
Today we are releasing Grafana 8.3.5 and 7.5.15. This patch release includes MEDIUM severity security fix for Cross Site Request Forgery for Grafana.
Release v.8.3.5, only containing security fixes:
- Download Grafana 8.3.5
- Release notes
Release v.7.5.15, only containing security fixes:
- Download Grafana 7.5.15
- Release notes
Summary
On Jan. 18, security researchers jub0bs and abrahack contacted Grafana to disclose a CSRF vulnerability which allows anonymous attackers to elevate their privileges by mounting cross-origin attacks against authenticated high-privilege Grafana users (for example, Editors or Admins).
We believe that this vulnerability is rated at CVSS 6.8 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N).
Impact
An attacker can exploit this vulnerability for privilege escalation by tricking an authenticated user into inviting the attacker as a new user with high privileges.
Affected versions with MEDIUM severity
All Grafana >=3.0-beta1 versions are affected by this vulnerability.
Solutions and mitigations
All installations after Grafana v3.0-beta1 should be upgraded as soon as possible.
Note that if you are running Grafana behind any reverse proxy, you need to make sure that you are passing the original Host and Origin headers from the client request to Grafana.
In the case of Apache Server, you need to add ProxyPreserveHost on in your proxy configuration. In case of NGINX, you can need to add proxy_set_header Host $http_host; in your configuration.
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.
Timeline and postmortem
Here is a detailed timeline starting from when we originally learned of the issue. All times in UTC.
- 2022-01-18 03:00 Issue submitted by external researchers
- 2022-01-18 17:25 Vulnerability confirmed reproducible
- 2022-01-19 07:40 CVSS score confirmed 6.8 at maximum and MEDIUM impact
- 2022-01-19 07:40 Begin mitigation for Grafana Cloud
- 2022-01-19 17:00 CVE requested
- 2022-01-19 19:50 GitHub issues CVE-2022-21703
- 2022-01-21 10:50 PR with fix opened
- 2022-01-21 14:13 Private release planned for 2022-01-25, and public release planned for 2022-02-01.
- 2022-01-25 12:00 Private release
- 2022-02-01 12:00 During the public release process, we realized that private 7.x release was incomplete. Abort public release, send second private release to customers using 7.x
- 2022-02-08 12:00 Public release
Acknowledgement
We would like to thank jub0bs and abrahack for responsibly disclosing the vulnerability.
Reporting security issues
If you think you have found a security vulnerability, please send a report to [email protected]. 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.
References
- GHSA-cmf4-h3xc-jw8w
- https://nvd.nist.gov/vuln/detail/CVE-2022-21703
- grafana/grafana#45083
- https://grafana.com/blog/2022/02/08/grafana-7.5.15-and-8.3.5-released-with-moderate-severity-security-fixes/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/2PFW6Q2LXXWTFRTMTRN4ZGADFRQPKJ3D/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/36GUEPA5TPSC57DZTPYPBL6T7UPQ2FRH/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/HLAQRRGNSO5MYCPAXGPH2OCSHOGHSQMQ/
- https://security.netapp.com/advisory/ntap-20220303-0005/
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Grafana is an open-source platform for monitoring and observability. Affected versions of Grafana expose multiple API endpoints which do not properly handle user authorization. `/teams/:teamId` will allow an authenticated attacker to view unintended data by querying for the specific team ID, `/teams/:search` will allow an authenticated attacker to search for teams and see the total number of available teams, including for those teams that the user does not have access to, and `/teams/:teamId/members` when editors_can_admin flag is enabled, an authenticated attacker can see unintended data by querying for the specific team ID. Users are advised to upgrade as soon as possible. There are no known workarounds for this issue.
Grafana before 7.1.0-beta 1 allows XSS via a query alias for the ElasticSearch datasource.
Grafana through 6.7.1 allows stored XSS due to insufficient input protection in the originalUrl field, which allows an attacker to inject JavaScript code that will be executed after clicking on Open Original Dashboard after visiting the snapshot.