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Grafana Tool Vulnerability Let Attackers Inject SQL Queries

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The popular open-source platform Grafana, widely used for monitoring and observability, has been found to contain a severe SQL injection vulnerability.

This flaw allows attackers with valid user credentials to execute arbitrary SQL commands, potentially leading to data leakage and other security breaches.

Vulnerability Description and Impact

The vulnerability resides in the Grafana SQL package, specifically within the SqlDatasource.ts file, where SQL queries are handled and executed.

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Attackers can exploit this by sending a malicious POST request to the /api/ds/query endpoint with a specially crafted raw SQL parameter.

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This flaw affects all versions of Grafana, including the latest releases.

As reported by GitHub, this vulnerability’s risk level is high because an attacker could access or manipulate sensitive data stored in the connected databases.

The impact is widespread as it affects all previous and current versions of Grafana, posing a significant threat to organizations relying on this data analytics and monitoring tool.

Vulnerability Analysis

affected code blocks and functions
affected code blocks and functions

The issue’s core lies in the lack of proper validation of the SQL queries sent through the Grafana backend.

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The affected code blocks allow SQL statements to be executed without adequate checks, allowing attackers to inject malicious SQL code.

This is demonstrated in the source code from SqlDatasource.ts and datasource.ts files, where the run SQL and metricFindQuery functions, respectively, handle the SQL query executions.

The vulnerability explicitly allows time-based blind SQL injection, a more stealthy form of SQL injection that can be particularly difficult to detect and prevent as it does not return errors from the database.

Recurrence and Bug Repair

grafana send sql statement query leads to bug.
grafana send sql statement query leads to bug.

This is not the first time vulnerabilities have been reported in Grafana, and the recurrence of such security issues raises concerns about the overall security practices and vulnerability management within the Grafana development team.

Despite the severity, the Grafana security team does not recognize this flaw as a vulnerability but rather as a feature of the backend system.

This controversial stance highlights the challenges in perceiving and managing security risks in open-source projects.

Regarding mitigation, since Grafana does not validate queries sent to the DataSource proxy, the data sources connected to Grafana must have robust filtering and validation mechanisms to prevent SQL injection attacks.

The discovery of this SQL injection vulnerability in Grafana underscores the critical need for continuous security assessment and improvement, especially in open-source software used in sensitive environments.

Organizations using Grafana should implement additional security measures and stay vigilant for unusual activities in their systems.

As the debate continues about recognizing a feature versus a vulnerability, the security community will likely closely monitor how Grafana addresses this and future security issues.

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Divya
Divya
Divya is a Senior Journalist at GBhackers covering Cyber Attacks, Threats, Breaches, Vulnerabilities and other happenings in the cyber world.

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