CVE-2023-27321

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

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.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
EPSS 0.44%
Vendor Advisory opcfoundation.org
Affected: OPC Foundation UA .NET Standard
Published at:
Updated at:

References

Link Tags
https://www.zerodayinitiative.com/advisories/ZDI-23-548/
https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2023-27321.pdf vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-27321?
CVE-2023-27321 has been scored as a high severity vulnerability.
How to fix CVE-2023-27321?
To fix CVE-2023-27321, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-27321 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-27321 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-27321?
CVE-2023-27321 affects OPC Foundation UA .NET Standard.
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