Advisory Details

June 16th, 2022

(Pwn2Own) OPC Foundation UA .NET Standard Improper Input Validation Authentication Bypass Vulnerability

CVE ID	CVE-2022-29865
CVSS SCORE	9.1, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
AFFECTED VENDORS	OPC Foundation
AFFECTED PRODUCTS	UA .NET Standard
VULNERABILITY DETAILS	This vulnerability allows remote attackers to bypass authentication 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 certificates. The issue results from the lack of proper validation of a user-supplied certificate. An attacker can leverage this vulnerability to bypass authentication on the system.
ADDITIONAL DETAILS	OPC Foundation has issued an update to correct this vulnerability. More details can be found at: https://files.opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2022-29865.pdf
DISCLOSURE TIMELINE	2022-05-09 - Vulnerability reported to vendor 2022-06-16 - Coordinated public release of advisory 2022-06-16 - Advisory Updated
CREDIT	Daan Keuper & Thijs Alkemade from Computest

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