Vulnerability Description
Grafana is an open-source platform for monitoring and observability. In affected versions if an attacker is able to convince a victim to visit a URL referencing a vulnerable page, arbitrary JavaScript content may be executed within the context of the victim's browser. The user visiting the malicious link must be unauthenticated and the link must be for a page that contains the login button in the menu bar. The url has to be crafted to exploit AngularJS rendering and contain the interpolation binding for AngularJS expressions. AngularJS uses double curly braces for interpolation binding: {{ }} ex: {{constructor.constructor(‘alert(1)’)()}}. When the user follows the link and the page renders, the login button will contain the original link with a query parameter to force a redirect to the login page. The URL is not validated and the AngularJS rendering engine will execute the JavaScript expression contained in the URL. Users are advised to upgrade as soon as possible. If for some reason you cannot upgrade, you can use a reverse proxy or similar to block access to block the literal string {{ in the path.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Grafana | Grafana | >= 8.0.0, < 8.2.3 |
Related Weaknesses (CWE)
References
- https://github.com/grafana/grafana/commit/31b78d51c693d828720a5b285107a50e6024c9PatchThird Party Advisory
- https://github.com/grafana/grafana/commit/3cb5214fa45eb5a571fd70d6c6edf0d729983fPatchThird Party Advisory
- https://github.com/grafana/grafana/commit/fb85ed691290d211a5baa44d9a641ab137f0dePatchThird Party Advisory
- https://github.com/grafana/grafana/security/advisories/GHSA-3j9m-hcv9-rpj8Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211125-0003/Third Party Advisory
- https://github.com/grafana/grafana/commit/31b78d51c693d828720a5b285107a50e6024c9PatchThird Party Advisory
- https://github.com/grafana/grafana/commit/3cb5214fa45eb5a571fd70d6c6edf0d729983fPatchThird Party Advisory
- https://github.com/grafana/grafana/commit/fb85ed691290d211a5baa44d9a641ab137f0dePatchThird Party Advisory
- https://github.com/grafana/grafana/security/advisories/GHSA-3j9m-hcv9-rpj8Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211125-0003/Third Party Advisory
FAQ
What is CVE-2021-41174?
CVE-2021-41174 is a vulnerability with a CVSS score of 6.9 (MEDIUM). Grafana is an open-source platform for monitoring and observability. In affected versions if an attacker is able to convince a victim to visit a URL referencing a vulnerable page, arbitrary JavaScript...
How severe is CVE-2021-41174?
CVE-2021-41174 has been rated MEDIUM with a CVSS base score of 6.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-41174?
Check the references section above for vendor advisories and patch information. Affected products include: Grafana Grafana.