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 entfernter, anonymer oder ein lokaler Angreifer kann mehrere Schwachstellen in NGINX NGINX Plus und NGINX 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:

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Fedora Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• Gentoo Linux
• RESF Rocky Linux
• NGINX NGINX Plus <R32 P1
• NGINX NGINX Plus <R31 P3
• NGINX NGINX Open Source <1.27.1

and 5 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 R32 P1
• NGINX NGINX Plus R31 P3
• NGINX NGINX Open Source 1.27.1
• NGINX NGINX Open Source 1.26.2
• Dell PowerProtect Data Domain 8.4.0.0
• Dell PowerProtect Data Domain 7.10.1.70
• Dell PowerProtect Data Domain 7.13.1.40
• Dell PowerProtect Data Domain 8.3.1.10

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.