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 in der Kpomponente iperf3 ausnutzen, um einen Denial of Service Angriff durchzuführen und vertrauliche Informationen offenzulegen.

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
• vertrauliche Informationen offenzulegen

Am I affected?

Affected according to the BSI:

• Red Hat Enterprise Linux
• SUSE Linux
• Oracle Linux
• Dell PowerScale OneFS
• Red Hat Enterprise Linux iperf <3.15
• Red Hat Enterprise Linux iperf <3.17

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 iperf 3.15
• Red Hat Enterprise Linux iperf 3.17

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.