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CVE-2023-27321 PUBLISHED CVSS 7.5 HIGH

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.

EPSS 1.31% · 79.7th percentile

Risk Scores

CVSS v3.0
7.5
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
1.31%
79.7th percentile

Affected Products

VendorProductVersions
opcfoundationua-.netstandard0
OPC FoundationUA .NET Standard1.4.371.60
NuGetOPCFoundation.NetStandard.Opc.Ua.Server0
opcfoundationunified_architecture_.net-standard1.4.371.60

Timeline

References

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