What it is about

Keycloak ermöglicht Single Sign-On mit Identity and Access Management für moderne Anwendungen und Dienste. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Keycloak ausnutzen, um Dateien zu manipulieren, was zu einer Umgehung der Authentifizierung oder einem Denial-of-Service führen kann.

Under what conditions?

Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.

What can happen in the worst case

An attacker could use the vulnerability to

• Dateien zu manipulieren
• was zu einer Umgehung der Authentifizierung oder einem Denial-of-Service führen kann

Am I affected?

Affected according to the BSI:

• Red Hat Enterprise Linux
• Open Source Keycloak SAML brokering
• Hitachi Ops Center Common Services <11.0.8-00

The installed version is usually shown under “Help → About” or in the device’s admin interface.

What helps?

Update to at least:

• Hitachi Ops Center Common Services 11.0.8-00

Is the vulnerability already being exploited?

None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.