What it is about

Go ist eine quelloffene Programmiersprache. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Golang Go im "x/net/html" Paket 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
• Ubuntu Linux
• SUSE Linux
• SUSE openSUSE
• Red Hat Enterprise Linux Advanced Cluster Security for Kubernetes 4
• Red Hat OpenShift Data Foundation 4
• IBM App Connect Enterprise
• Golang Go x/net/html <0.33.0
• Red Hat OpenShift Container Platform <4.16.30
• Red Hat OpenShift Container Platform <4.15.43

and 44 more

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

What helps?

Update to at least:

• Golang Go x/net/html 0.33.0
• Red Hat OpenShift Container Platform 4.16.30
• Red Hat OpenShift Container Platform 4.15.43
• Red Hat OpenShift Container Platform 4.17.14
• Red Hat OpenShift Container Platform 4.17.15
• Red Hat OpenShift Container Platform 4.16.33
• Red Hat OpenShift Container Platform 4.12.72
• Red Hat OpenShift Container Platform 4.17.16
• Red Hat OpenShift Container Platform 4.16.34
• Red Hat OpenShift Container Platform 4.15.45
• Red Hat OpenShift Container Platform 4.14.48
• Red Hat OpenShift Container Platform 4.16.35

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.