HTTP: Grafana Labs Cross-site Scripting

This signature detects attempts to exploit a known cross-site scripting vulnerability against Grafana Labs. It is due to insufficient validation of user-supplied input. Attackers can steal cookie-based authentication credentials and launch other attacks.

Extended 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.

Affected Products

Grafana grafana

References

CVE: CVE-2023-0507

URL: https://grafana.com/docs/grafana/latest/release-notes/release-notes-8-2-3/

Short Name

HTTP:XSS:GRAFANA-LABS

Severity

Minor

Recommended

False

Recommended Action

Drop

HTTP: Grafana Labs Cross-site Scripting

Extended Description

Affected Products

References

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