Affected: Bitnami: grafana

An authenticated user with permission to create or edit alert rules can bypass datasource query authorization by marking an alert rule query as a server-side expression while referencing a real datasource UID (incorrect authorization). This can expose data accessible through Grafana's configured datasource credentials to users who lack permission to query that datasource.

An authenticated user with permission to create or edit alert rules can bypass datasource query authorization by marking an alert rule query as a server-side expression while referencing a real datasource UID (incorrect authorization). This can expose data accessible through Grafana's configured datasource credentials to users who lack permission to query that datasource.

Summary

An authenticated organization user who can create or edit alert rules in a folder can query a datasource for which they do not have datasources:query permission. The attacker sets the client-controlled query field queryType to __expr__ while retaining the UID of a real datasource.

The alert-rule authorization path treats the query as a server-side expression and skips datasource permission enforcement, while the evaluator subsequently resolves and executes the query against the real datasource identified by datasourceUid.

## Impact

This bypass can expose data accessible through Grafana's configured datasource credentials to a low-privileged user who is not authorized to query that datasource directly. Confidentiality impact is High.

Integrity impact is Low because some datasource backends and configured credentials may permit state-changing queries. No availability impact has been demonstrated.

## Attack prerequisites

- Authenticated, low-privileged user in the same Grafana organization - Permission to create or edit alert rules in an accessible folder - No datasources:query permission for the targeted datasource - Knowledge or discovery of the targeted datasource UID - No user interaction required

## Technical details / root cause

1. The attacker submits an alert-rule query with queryType: "__expr__" and the UID of a real datasource. 2. The datasource authorization helper skips permission enforcement when query.QueryType == "__expr__". 3. queryType is clien…

grafana-12.4.10-1.1 on GA media

Affected: Ubuntu:16.04:LTS: grafana

An authenticated user with permission to create or edit alert rules can bypass datasource query authorization by marking an alert rule query as a server-side expression while referencing a real datasource UID (incorrect authorization). This can expose data accessible through Grafana's configured datasource credentials to users who lack permission to query that datasource.

Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Grafana ausnutzen, um Sicherheitsvorkehrungen zu umgehen, und um Informationen offenzulegen.