CVE-2023-43505 Missing authorization in COMOS

Critical 9.6 Published 14 Nov 2023 Updated 8 Jan 2025

An attacker can access unauthorized files due to missing access controls in SMB shares within Siemens COMOS.

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

What is CVE-2023-43505?

CVE-2023-43505 is a critical missing authorization vulnerability in Siemens COMOS, published on 14 Nov 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability has been identified in COMOS (All versions). The affected application lacks proper access controls in SMB shares. This could allow an attacker to access files that the user should not have access to.

Weakness: CWE-284

Which versions are affected by CVE-2023-43505?

It affects 1 product.

Products include Siemens Comos.

How do I fix CVE-2023-43505?

No fix has been published for CVE-2023-43505 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-2023-43505 being exploited?

There is no known exploitation of CVE-2023-43505 in the wild and no public exploit code.

Sources

Also known as GHSA-65vf-c6c4-w8jr.