The IBM z/OS system administrator (SA) must develop a process notify appropriate personnel when accounts are modified.
Overview
Finding ID
Version
Rule ID
IA Controls
Severity
V-223541
ACF2-OS-000050
SV-223541r1001140_rule
Medium
Description
Once an attacker establishes access to a system, the attacker often attempts to create a persistent method of reestablishing access. One way to accomplish this is for the attacker to modify an existing account. Notification of account modification is one method for mitigating this risk. A comprehensive account management process will ensure an audit trail which documents the modification of operating system user accounts and notifies the SA and information system security officer (ISSO) of changes. Such a process greatly reduces the risk that accounts will be surreptitiously created and provides logging that can be used for forensic purposes.
To address access requirements, many operating systems can be integrated with enterprise-level authentication/access/auditing mechanisms that meet or exceed access control policy requirements.