ZDI-CAN-16927: (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 OpcUa_SecureListener_ProcessSessionCallRequest 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.

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

• agent/references
• collector/zdi-advisory
• source/ZDI
• alias/ZDI-22-1030
• alias/ZDI-CAN-16927
• alias/CVE-2022-37012
• agent/software-canonical-lookup
• agent/severity
• agent/title
• agent/softwarecombine
• agent/tags
• agent/type
• agent/event
• agent/description
• vendor/unified automation
• canonical/unified automation opc ua c++ demo server