« All blog posts

OPC UA User Password Edit Exploit


A vulnerability (CVE-2022-2967) has been discovered in Prosys OPC UA applications that enables an attacker to gain unauthorized access to Prosys OPC UA Simulation Server or Modbus Server.

The exploit has been evaluated with CVSS Base Score 6.5 and Vector String CVSS:3.0/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.


The exploit enables a local privileged user to obtain the passwords of the users after they have been entered in the user interface of the OPC UA server applications and use them to authenticate respectively via the OPC UA interface.

The vulnerability was discovered by researchers at the Purdue University and it was reported by CISA as ICSA-22-349-01

Prosys OPC UA products affected

The vulnerability affects directly:

  • Prosys OPC UA Simulation Server 5.3.0 and earlier
  • Prosys OPC UA Modbus Server 1.4.18 and earlier

Fixed products

The issue has been fixed in Simulation Server 5.4.0 and Modbus Server 1.4.20 and we encourage everyone to update to these versions.

Avoiding the issue in existing products

The vulnerability occurs only when passwords are edited in the applications. If the applications are restarted after editing passwords, the exploit will not succeed, so that is a working mitigation.

It is also very important to ensure the physical security of the computers that are run the OPC UA applications. Since this issue is only locally exploitable, proper physical securty will mitigate the vulnerability.

More security information

You will find the currently announced security issues in Prosys OPC products from the blog under the #Security tag.

You might also like to read about the OPC UA Security Process of the OPC Foundation.

Jouni Aro profile photo

Jouni Aro

Chief Technology Officer

Email: jouni.aro@prosysopc.com

Expertise and responsibility areas: OPC & OPC UA product development, project work and customer support

Tags: OPC UA, Security

comments powered by Disqus

About Prosys OPC Ltd

Prosys OPC is a leading provider of professional OPC software and services with over 20 years of experience in the field. OPC and OPC UA (Unified Architecture) are communications standards used especially by industrial and high-tech companies.

Read more about us »

Newest blog posts

OPC UA PubSub to Cloud via MQTT

Detailed overview of the demo presented at the OPC Foundation booth

SimServer How To #3: Simulate data changes on a server using an OPC UA client

A two-part step-by-step tutorial on how to write data changes on an OPC UA server using an OPC UA client.

How to Succeed in the Production Analytics Project

Industry 4.0 analytics projects are going to be Significantly rising business in the next couple of years. Read how to bypass the most common cavepits and delivery projects succesfully.

View all blog posts »