VDB

CVE-2023-27321

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 1.05% · 63.7th percentile

Risk Scores

CVSS 3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
1.05%
63.7th 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

  • May 5, 2023 CVE Published
  • May 8, 2024 EPSS Score
  • Jun 2, 2024 EPSS Score
  • Jun 28, 2024 EPSS Score
  • Jul 23, 2024 EPSS Score
  • Sep 11, 2024 EPSS Score
  • Oct 6, 2024 EPSS Score
  • Oct 31, 2024 EPSS Score
  • Nov 24, 2024 EPSS Score
  • Dec 20, 2024 EPSS Score
  • Jan 14, 2025 EPSS Score
  • Feb 8, 2025 EPSS Score

References

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