The CA-TSS NPPTHRESH Control Option must be properly set.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-223878 | TSS0-ES-000050 | SV-223878r958388_rule | CCI-000044 | medium |
| Description | ||||
| By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account. | ||||
| STIG | Date | |||
| IBM z/OS TSS Security Technical Implementation Guide | 2025-06-24 | |||
Details
Check Text (C-223878r958388_chk)
From the ISPF Command Shell enter:
TSS MODIFY STATUS
If the NPPTHRESH Control Option value is not set to NPWRTHRESH(02), this is a finding.
Fix Text (F-25539r516034_fix)
Evaluate the impact associated with implementation of the control option. Develop a plan of action to implement the control option setting as specified following and proceed with the change.
NPPTHRESH(02)