What it is about

Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution. Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux (jq) 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
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• RESF Rocky Linux
• Red Hat Enterprise Linux 9
• Red Hat OpenShift Container Platform <4.18.21
• Red Hat OpenShift Container Platform <4.16.45
• Red Hat OpenShift Container Platform <4.15.57
• Phoenix Contact FL MGUARD <1.8.1
• Dell Secure Connect Gateway Appliance <5.32.00.18

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 4.18.21
• Red Hat OpenShift Container Platform 4.16.45
• Red Hat OpenShift Container Platform 4.15.57
• Phoenix Contact FL MGUARD 1.8.1
• Dell Secure Connect Gateway Appliance 5.32.00.18

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.