Advisory Details

May 31st, 2023

(Pwn2Own) Unified Automation UaGateway OPC UA Server Use-After-Free Denial-of-Service Vulnerability

ZDI-23-777
ZDI-CAN-20497

CVE ID CVE-2023-32172
CVSS SCORE 6.5, AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AFFECTED VENDORS Unified Automation
AFFECTED PRODUCTS UaGateway
VULNERABILITY DETAILS

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 implementation of the ImportXML function. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.

ADDITIONAL DETAILS Unified Automation has issued an update to correct this vulnerability. More details can be found at:
https://documentation.unified-automation.com/uagateway/1.5.14/CHANGELOG.txt
DISCLOSURE TIMELINE
  • 2023-02-24 - Vulnerability reported to vendor
  • 2023-05-31 - Coordinated public release of advisory
CREDIT Claroty Research - Team82 - Uri Katz, Noam Moshe, Vera Mens, Sharon Brizinov
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