CVE-2019-18938 Code injection in n/a

Critical 9.8 Published 14 Nov 2019 Updated 5 Aug 2024

Unauthenticated attackers can execute arbitrary code on Homematic CCU2/CCU3 devices via the E-Mail AddOn web interface.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-18938?

CVE-2019-18938 is a critical code injection vulnerability in n/a, published on 14 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

eQ-3 Homematic CCU2 2.47.20 and CCU3 3.47.18 with the E-Mail AddOn through 1.6.8.c installed allow Remote Code Execution by unauthenticated attackers with access to the web interface via the save.cgi script for payload upload and the testtcl.cgi script for its execution.

Weakness: CWE-306

Which versions are affected by CVE-2019-18938?

It affects 3 products.

Products include Eq-3 Homematic Ccu2 Firmware, Eq-3 Homematic Ccu3 Firmware, Hm Email Project Hm Email.

How do I fix CVE-2019-18938?

No fix has been published for CVE-2019-18938 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2019-18938 being exploited?

There is no known exploitation of CVE-2019-18938 in the wild and no public exploit code.

Sources

Also known as GHSA-x4cw-9v3q-3qv3.