What it is about

NGINX Plus ist die kommerzielle Variante von NGINX, einer Webserver-, Reverse Proxy- und E-Mail Proxy Software. NGINX ist eine Webserver-, Reverse Proxy- und E-Mail-Proxy Software. Ein lokaler Angreifer kann mehrere Schwachstellen in NGINX Plus und NGINX ausnutzen, um einen Denial of Service Angriff durchzuführen und vertrauliche Informationen offenzulegen oder sonstige Auswirkungen zu verursachen.

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

• einen Denial of Service Angriff durchzuführen
• vertrauliche Informationen offenzulegen oder sonstige Auswirkungen zu verursachen

Am I affected?

Affected according to the BSI:

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• NGINX NGINX Plus <R27 P1
• NGINX NGINX Plus <R26 P1
• NGINX NGINX Open Source <1.23.2 (mainline)
• NGINX NGINX Open Source <1.22.1 (stable)
• NGINX NGINX Open Source Subscription <R2 P1
• NGINX NGINX Open Source Subscription <R1 P1

and 2 more

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

What helps?

Update to at least:

• NGINX NGINX Plus R27 P1
• NGINX NGINX Plus R26 P1
• NGINX NGINX Open Source 1.23.2 (mainline)
• NGINX NGINX Open Source 1.22.1 (stable)
• NGINX NGINX Open Source Subscription R2 P1
• NGINX NGINX Open Source Subscription R1 P1
• NGINX NGINX Ingress Controller 2.4.1
• NGINX NGINX Ingress Controller 1.12.5

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.