OPC Foundation UA .NET Standard ConditionRefresh Resource Exhaustion Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of OPC Foundation UA .NET Standard. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of OPC UA ConditionRefresh requests. By sending a large number of requests, an attacker can consume all available resources on the server. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20505.
History

Thu, 14 Aug 2025 06:30:00 +0000

Type Values Removed Values Added
First Time appeared Opcfoundation
Opcfoundation ua-.netstandard
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:a:opcfoundation:ua-.netstandard:*:*:*:*:*:*:*:*
Vendors & Products Opcfoundation
Opcfoundation ua-.netstandard

cve-icon MITRE

Status: PUBLISHED

Assigner: zdi

Published: 2024-05-07T22:55:01.898Z

Updated: 2024-08-02T12:09:43.438Z

Reserved: 2023-02-28T17:58:45.477Z

Link: CVE-2023-27321

cve-icon Vulnrichment

Updated: 2024-08-02T12:09:43.438Z

cve-icon NVD

Status : Analyzed

Published: 2024-05-07T23:15:15.760

Modified: 2025-08-14T01:37:46.230

Link: CVE-2023-27321

cve-icon Redhat

No data.