CVE-2025-4384 - Certificate validity not properly verified

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MEDIUM

Certificate validity not properly verified

Published May 6, 2025

6.0

MEDIUM

CVSS 4.0

EPSS 0.13%

Description

The MQTT add-on of PcVue fails to verify that a remote device’s certificate has not already expired or has not yet become valid. This allows malicious devices to present certificates that are not rejected properly.

The use of a client certificate reduces the risk for random devices to take advantage of this flaw.

Affected products

Vendor Arcinfo Product PcVue Default
unaffected
Affected
- ≥ 15.0, < 15.2.12
- ≥ 16.0, < 16.2.5
Unaffected
- 16.3.0

Default status is the baseline for the product. Each version can override it (patched versions can be marked unaffected).

Vendor	Product	Default status	Versions
Arcinfo	PcVue	unaffected	Affected ≥ 15.0, < 15.2.12 ≥ 16.0, < 16.2.5 Unaffected 16.3.0

Remediation

Vendor solution

Harden the configuration Who should apply this recommendation: All users The system operators are highly recommended to take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should: * Use client certificate when configuring the MQTT add-on. * Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet unless required. * Locate control system networks and remote devices behind firewalls and isolate them from business networks. * When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its connected devices.

Update PcVue Who should apply this recommendation: All users using the affected component Apply the patch by installing a fixed PcVue version.

Available patches: Fixed in: * PcVue 16.2.5 and PcVue 16.3.0 * PcVue 15.2.12

Weaknesses (1)

CWE-298