CVE-2023-27321
Uncontrolled Resource Consumption in OPC UA .NET Standard Reference Server
7.5
HIGH
CVSS 3.1
EPSS 3.3%
Description
This security update resolves a vulnerability in the OPC UA .NET Standard Reference Server that allows remote attackers to send malicious requests that consume all memory available to the server. https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2023-27321.pdf
How to fix CVE-2023-27321
To remediate CVE-2023-27321, upgrade the affected package to a fixed version below.
- —upgrade to 1.4.371.86 or later
Is CVE-2023-27321 being exploited?
Low — EPSS is 3.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 1.4.371.86
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |