CVE-2018-4856 Auth bypass in SICLOCK TC100, SICLOCK TC400

Medium 4.9 Published 3 Jul 2018 Updated 17 Sep 2024

An attacker with administrative access can lock out legitimate users from the SICLOCK management interface, requiring manual intervention to restore access.

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

What is CVE-2018-4856?

CVE-2018-4856 is a medium-severity authentication bypass vulnerability in Siemens AG SICLOCK TC100, SICLOCK TC400, published on 3 Jul 2018. An attacker needs administrator access to exploit it, 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 administrative access to the device's management interface could lock out legitimate users. Manual interaction is required to restore the access of legitimate users.

Weakness: CWE-287

Which versions are affected by CVE-2018-4856?

It affects 2 products.

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

How do I fix CVE-2018-4856?

No fix has been published for CVE-2018-4856 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2018-4856 being exploited?

There is no known exploitation of CVE-2018-4856 in the wild and no public exploit code.

Sources

Also known as GHSA-vjcj-jj92-97vr.