What’s Vulnerable › Vulnerabilities

CVE-2023-32171: Unified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability

• Severity: medium (CVSS 6.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-03 · updated 2026-06-17
• Weakness: CWE-476

Description

Unified Automation UaGateway OPC UA Server Null Pointer Dereference Denial-of-Service Vulnerability. This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of Unified Automation UaGateway. Authentication is required to exploit this vulnerability. The specific flaw exists within the ImportCsv method. A crafted XML payload can cause a null pointer dereference. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-20495.

Affected products

• Unified Automation UaGateway: before 1.5.13.487 — fixed in 1.5.13.487

How to fix

Upgrade to a fixed version: Unified Automation UaGateway 1.5.13.487. Check the vendor advisory for mitigations.

References

• https://documentation.unified-automation.com/uagateway/1.5.14/CHANGELOG.txt
• https://www.zerodayinitiative.com/advisories/ZDI-23-776/
• https://documentation.unified-automation.com/uagateway/1.5.14/CHANGELOG.txt
• https://www.zerodayinitiative.com/advisories/ZDI-23-776/

Get alerted when CVE-2023-32171 or the next vulnerability affects your stack