CVE-2023-2183: 
Grafana vulnerability analysis and mitigation

Grafana, an open-source platform for monitoring and observability, was found to have a broken access control vulnerability identified as CVE-2023-2183. The vulnerability was discovered in June 2023 and affects versions prior to 9.5.3, 9.4.12, 9.3.15, 9.2.19, and 8.5.26. The issue stems from the API not properly checking access controls for test alert functionality, allowing users with Viewer role privileges to access features they shouldn't have permission to use (Grafana Advisory, NVD).

The vulnerability exists in Grafana's alert manager functionality where the API fails to properly validate access controls. While the user interface correctly restricts Viewer role users from accessing the test alert option, the underlying API endpoint does not implement these same restrictions. This allows users with Viewer privileges to bypass intended security controls and send test alerts through direct API calls. The vulnerability has been assigned a CVSS v3.1 base score of 6.4 (Medium) with a vector of CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N (NetApp Advisory).

The exploitation of this vulnerability could enable malicious users to abuse the alert functionality in several ways. Attackers could send multiple unauthorized alert messages to email and Slack, potentially leading to spam campaigns, phishing attacks, or denial of service by overwhelming SMTP servers. This could result in email blocking or blacklisting of IP addresses. The vulnerability also poses a risk of sensitive information disclosure and unauthorized data modification (GitHub Advisory).

The vulnerability has been fixed in Grafana versions 9.5.3, 9.4.12, 9.3.15, 9.2.19, and 8.5.26. Organizations are advised to upgrade to these or newer versions to receive the fix. As an additional mitigation measure, it is recommended to limit the ability to send multiple emails to the same address per unit of time on SMTP servers and implement proper API access controls (Grafana Advisory).