What it is about

Red Hat Enterprise Linux (RHEL) ist eine populäre Linux-Distribution. Ein lokaler Angreifer kann eine Schwachstelle in der giflib Komponente in Red Hat Enterprise Linux ausnutzen, um den Speicher zu beschädigen, was möglicherweise zu einem Denial-of-Service-Zustand oder zur Ausführung von beliebigem Code führen kann.

Under what conditions?

Only with access to the device or an account on it. Often the second step after a phishing email.

What can happen in the worst case

An attacker could use the vulnerability to

• den Speicher zu beschädigen
• was möglicherweise zu einem Denial-of-Service-Zustand oder zur Ausführung von beliebigem Code führen kann

Am I affected?

Affected according to the BSI:

• Debian Linux
• Red Hat Enterprise Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• RESF Rocky Linux
• Red Hat Enterprise Linux 10
• Red Hat Enterprise Linux 9
• Red Hat Enterprise Linux 8
• Red Hat Enterprise Linux 7 Extended Lifecycle Support
• Red Hat Enterprise Linux 8.2 Advanced Update Support
• Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

and 7 more

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.