What it is about

Undertow ist ein Webserver, der als leichtgewichtige und flexible Lösung für moderne Webanwendungen konzipiert ist. Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Undertow ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Daten zu manipulieren 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

• Sicherheitsvorkehrungen zu umgehen
• Daten zu manipulieren
• vertrauliche Informationen offenzulegen

Am I affected?

Affected according to the BSI:

• Red Hat Enterprise Linux
• Red Hat Undertow

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

What helps?

Install the updates provided by the vendor; details in the sources below.

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.