What it is about

Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Advanced Cluster Securityausnutzen, um einen Denial of Service Angriff durchzuführen.

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

• einen Denial of Service Angriff durchzuführen

Am I affected?

Affected according to the BSI:

• Red Hat Enterprise Linux
• Fedora Linux
• SUSE Linux
• Red Hat Enterprise Linux Advanced Cluster Management for Kubernetes 2
• Red Hat OpenShift multicluster engine for Kubernetes 1
• Red Hat Enterprise Linux Advanced Cluster Security <4.5.7
• Red Hat Enterprise Linux Advanced Cluster Security <4.6.3
• Red Hat Enterprise Linux Gatekeeper 3.17
• Red Hat OpenShift Multicluster Global Hub 1.3
• Red Hat OpenShift Container Platform <4.18.14
• Red Hat Enterprise Linux multicluster engine for Kubernetes 1
• Red Hat OpenShift Container Platform <4.16.42

and 5 more

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

What helps?

Update to at least:

• Red Hat Enterprise Linux Advanced Cluster Security 4.5.7
• Red Hat Enterprise Linux Advanced Cluster Security 4.6.3
• Red Hat OpenShift Container Platform 4.18.14
• Red Hat OpenShift Container Platform 4.16.42
• Red Hat OpenShift Container Platform 4.14.53
• Red Hat OpenShift Container Platform 4.17.35
• Red Hat OpenShift Container Platform 4.15.55
• Red Hat OpenShift Container Platform 4.14.54
• Red Hat OpenShift Logging 6.2.7

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.