CVE-2023-3128

A flaw was found in Grafana, which validates Azure AD accounts based on the email claim. On Azure AD, the profile email field is not unique across Azure AD tenants, which enables Grafana account takeover and authentication bypass when Azure AD OAuth is configured with a multi-tenant AzureAD OAuth application. This may allow an attacker to gain complete control of the user's account, including access to private customer data and sensitive information.

The vulnerability affecting Red Hat Enterprise Linux 8 and 9 has been categorized as moderate, primarily because Azure Active Directory access is not supported by default in Grafana configurations. Specifically, it remains disabled in the Grafana configuration file located at /etc/grafana/grafana.ini within the Azure AD section. Even if someone were to enable Azure Active Directory access, they retain the option to easily revert it back to the default state, ensuring it remains disabled.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

We recommend disabling Active Directory in the Grafana configuration file until a fix is provided.