What it is about

Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux ausnutzen, 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:

• Amazon Linux 2
• Red Hat Enterprise Linux
• Fedora Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• RESF Rocky Linux
• IBM MQ operator
• Red Hat OpenShift Container Platform
• Red Hat OpenShift API for Data Protection
• Red Hat Enterprise Linux 9
• Red Hat Enterprise Linux Extended Update Support

and 29 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 OpenShift Container Platform 4.20.23
• Red Hat OpenShift Container Platform 4.18.42
• Red Hat OpenShift Container Platform 4.17.54
• Red Hat Enterprise Linux Cryostat 4.2.0
• Red Hat OpenShift GitOps 1.18.6
• Red Hat OpenShift Container Platform 4.19.32
• Red Hat Enterprise Linux Multicluster Global Hub 1.5.4
• Red Hat OpenShift Pipelines 1.20.5
• Red Hat OpenShift Container Platform 4.20.24
• Red Hat OpenShift Container Platform 4.18.45
• Red Hat OpenShift Container Platform 4.22.4
• Splunk Splunk Enterprise 10.4.1

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.