What it is about

NGINX ist eine Webserver-, Reverse Proxy- und E-Mail-Proxy Software. NGINX Plus ist die kommerzielle Variante von NGINX, einer Webserver-, Reverse Proxy- und E-Mail Proxy Software. Ein entfernter, anonymer Angreifer kann eine Schwachstelle in NGINX und NGINX NGINX Plus ausnutzen, um einen Denial of Service Angriff durchzuführen, und potenziell um beliebigen Programmcode auszuführen.

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
• potenziell um beliebigen Programmcode auszuführen

Am I affected?

Affected according to the BSI:

• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• SUSE openSUSE
• RESF Rocky Linux
• Gentoo Linux
• NGINX NGINX Open Source <1.31.1
• NGINX NGINX Open Source <1.30.2
• NGINX NGINX Plus <37.0.1.1

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 Open Source 1.31.1
• NGINX NGINX Open Source 1.30.2
• NGINX NGINX Plus 37.0.1.1
• NGINX NGINX Plus R36 P5
• NGINX NGINX Plus R32 P7

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.