CVE-2023-39479 Softing Secure Integration Server OPC UA Gateway Directory Creation Vulnerability

Medium 6.6 Published 3 May 2024 Updated 2 Aug 2024

Remote attackers can bypass authentication to create directories on the filesystem, potentially leading to root code execution.

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-2023-39479?

CVE-2023-39479 is a medium-severity path traversal vulnerability in Softing Secure Integration Server, published on 3 May 2024. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Softing Secure Integration Server OPC UA Gateway Directory Creation Vulnerability. This vulnerability allows remote attackers to create directories on affected installations of Softing Secure Integration Server. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed.

The specific flaw exists within the handling of FileDirectory OPC UA Objects. The issue results from allowing unauthorized access to the filesystem. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root. Was ZDI-CAN-20548.

Weakness: CWE-552

Which versions are affected by CVE-2023-39479?

It affects 1 product.

Products include Softing Secure Integration Server.

How do I fix CVE-2023-39479?

No fix has been published for CVE-2023-39479 yet. Limit exposure of the affected software until one is available.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2023-39479 being exploited?

There is no known exploitation of CVE-2023-39479 in the wild and no public exploit code.

Sources

Also known as GHSA-xc4w-62f4-xjvv.