ZDI-22-1030: (Pwn2Own) Unified Automation OPC UA C++ Improper Update of Reference Count Denial-of-Service Vulnerability
This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation OPC UA C++ Demo Server. Authentication is not required to exploit this vulnerability. The specific flaw exists within the OpcUaSecureListenerProcessSessionCallRequest method. A crafted OPC UA message can force the server to incorrectly update a reference count. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-22-1030?
The severity of ZDI-22-1030 is critical due to its potential to cause a denial-of-service condition.
How do I fix ZDI-22-1030?
To fix ZDI-22-1030, update to the latest version of Unified Automation OPC UA C++ Demo Server where the vulnerability has been patched.
Who is affected by ZDI-22-1030?
ZDI-22-1030 affects installations of Unified Automation OPC UA C++ Demo Server that have not applied the necessary updates.
Can ZDI-22-1030 be exploited remotely?
Yes, ZDI-22-1030 can be exploited remotely without requiring authentication.
What type of vulnerability is ZDI-22-1030?
ZDI-22-1030 is categorized as a denial-of-service vulnerability.