CVE-2023-27321

OPC Foundation UA .NET Standard ConditionRefresh Resource Exhaustion Denial-of-Service Vulnerability

Published May 7, 2024 CVSS 3.0 · 7.5 High EPSS 1.0% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2023-1630 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.
Github GHSA Github GHSA GHSA-vpf7-r2fv-75m9 Uncontrolled Resource Consumption in OPC UA .NET Standard Reference Server
History
Type Values Removed Values Added
First Time appeared Opcfoundation unified Architecture .net-standard
CPEs cpe:2.3:a:opcfoundation:unified_architecture_.net-standard:*:*:*:*:*:*:*:*
Vendors & Products Opcfoundation unified Architecture .net-standard
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

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
Weaknesses

Sources

Status
PUBLISHED
Assigner
zdi
Published
Updated
Aug 2, 2024, 12:09 PM
Reserved
Feb 28, 2023, 5:58 PM
Status
Analyzed
Published
May 7, 2024, 11:15 PM
Modified
Jun 17, 2026, 5:44 AM