Amazon Linux 2023: CVE-2022-0336: Important priority package update for samba

The Samba AD DC includes checks when adding service principals names (SPNs) to an account to ensure that SPNs do not alias with those already in the database. Some of these checks are able to be bypassed if an account modification re-adds an SPN that was previously present on that account, such as one added when a computer is joined to a domain. An attacker who has the ability to write to an account can exploit this to perform a denial-of-service attack by adding an SPN that matches an existing service. Additionally, an attacker who can intercept traffic can impersonate existing services, resulting in a loss of confidentiality and integrity.
A logic flaw in the Samba Active Directory Domain Controller leads to a denial of service and service impersonation. This flaw allows an attacker with the ability to write to an account to perform a denial of service attack or service impersonation by adding an SPN that matches an existing service.