CVE-2023-32172 Unified Automation UaGateway OPC UA Server Use-After-Free Denial-of-Service Vulnerability

Medium 6.5 Published 3 May 2024 Updated 2 Aug 2024

Remote authenticated attackers can cause a denial-of-service condition in Unified Automation UaGateway via a use-after-free flaw in the ImportXML function.

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-2023-32172?

CVE-2023-32172 is a medium-severity use after free vulnerability in Unified Automation UaGateway, published on 3 May 2024. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Unified Automation UaGateway OPC UA Server Use-After-Free Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation UaGateway. Authentication is required to exploit this vulnerability.

The specific flaw exists within the implementation of the ImportXML function. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20497.

Weakness: CWE-416

Which versions are affected by CVE-2023-32172?

It affects 1 product.

Products include Unified-Automation Uagateway.

How do I fix CVE-2023-32172?

No fix has been published for CVE-2023-32172 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2023-32172 being exploited?

There is no known exploitation of CVE-2023-32172 in the wild and no public exploit code.

Sources

Also known as GHSA-fwr2-hpwg-f69q.