Starting in May 10, 2022, Windows security updates have addressed CVE-2022-34691, CVE-2022-26931, and CVE-2022-26923 following a timeline that includes a Compatibility mode, Full Enforcement mode and a Disable mode. By May 9, 2023, all servers that run Active Directory Certificate Services and Windows domain controllers will be updated to Full Enforcement mode. These CVEs address an elevation of privilege vulnerability that can occur when the Kerberos Distribution Center (KDC) is servicing a certificate-based authentication request.
Before the May 10, 2022, security update, certificate-based authentication would not account for a dollar sign ($) at the end of a machine name. This allowed related certificates to be emulated (spoofed) in various ways. See KB5014754 for detailed information.
When will this happen
We will update all devices to Full Enforcement mode by May 9, 2023.
Message ID: MC465515
Published: 2022-11-10
Updated: 2022-11-10
Action required by: 2023-05-09
Product: Office 365 general
Platform: World tenant
Alex Lim
Alex Lim is a certified IT Technical Support Architect with over 15 years of experience in designing, implementing, and troubleshooting complex IT systems and networks. He has worked for leading IT companies, such as Microsoft, IBM, and Cisco, providing technical support and solutions to clients across various industries and sectors. Alex has a bachelor’s degree in computer science from the National University of Singapore and a master’s degree in information security from the Massachusetts Institute of Technology. He is also the author of several best-selling books on IT technical support, such as The IT Technical Support Handbook and Troubleshooting IT Systems and Networks. Alex lives in Bandar, Johore, Malaysia with his wife and two chilrdren. You can reach him at [email protected] or follow him on Website | Twitter | Facebook
