CVE-2018-4853 Missing authorization in SICLOCK TC100, SICLOCK TC400

Critical 9.8 Published 3 Jul 2018 Updated 16 Sep 2024

An attacker with network access can modify the firmware of SICLOCK TC100 and TC400 devices due to missing authentication on the TFTP service.

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-2018-4853?

CVE-2018-4853 is a critical missing authorization vulnerability in Siemens AG SICLOCK TC100, SICLOCK TC400, published on 3 Jul 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability has been identified in SICLOCK TC100 (All versions) and SICLOCK TC400 (All versions). An attacker with network access to port 69/udp could modify the firmware of the device.

Weakness: CWE-306

Which versions are affected by CVE-2018-4853?

It affects 2 products.

Products include Siemens Siclock Tc100 Firmware, Siemens Siclock Tc400 Firmware.

How do I fix CVE-2018-4853?

No fix has been published for CVE-2018-4853 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2018-4853 being exploited?

There is no known exploitation of CVE-2018-4853 in the wild and no public exploit code.

Sources

Also known as GHSA-hf7w-q4jc-hxp5.