IBM z/OS system administrator must develop a process to notify ISSOs of account enabling actions.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-223555	ACF2-OS-000190	SV-223555r533198_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 enable an existing disabled account. Sending notification of account enabling actions to the system administrator and ISSO is one method for mitigating this risk. Such a capability greatly reduces the risk that operating system accessibility will be negatively affected for extended periods of time and also provides logging that can be used for forensic purposes.

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 enable an existing disabled account. Sending notification of account enabling actions to the system administrator and ISSO is one method for mitigating this risk. Such a capability greatly reduces the risk that operating system accessibility will be negatively affected for extended periods of time and also provides logging that can be used for forensic purposes.

STIG	Date
IBM z/OS ACF2 Security Technical Implementation Guide	2023-06-16

Details

Check Text ( C-25228r500800_chk )
Ask the system Administrator for the documented processes to notify the Information System Security Officers (ISSOs) of account enabling actions. If there is no process documented, this is a finding.

Fix Text (F-25216r500801_fix)
Develop a documented process to notify the Information System Security Officers (ISSOs) of account enabling actions.