Ensure that the SETROPTS PASSWORD(MINCHANGE) value is set to a minimum of 1

HighLevel 1Manual reviewibm-z

Description

SETROPTS PASSWORD(MINCHANGE(<nnn>) specifies the number of days that must pass between a user's password and password phrase changes. Users can not change their own passwords and password phrases within the minimum change interval. How frequently a password can be changed should be limited to prevent a user from immediately changing the password multiple times to get back to the original one.

How it is checked

Audit method: Manual review

This recommendation cannot be checked automatically. A scan lists it with these instructions when you pass --include-manual.

Issue the following TSO command: SETROPTS LIST Review the command output in the PASSWORD PROCESSING OPTIONS: section. Look for the following message: PASSWORD MINIMUM CHANGE INTERVAL IS <nnn> DAYS. Verify the value is equal to or greater than 1 days.

How it is fixed

Fix method: Guidance or infrastructure patch

To modify the MINCHANGE parameter use the RACF SETROPTS command: SETROPTS PASSWORD(MINCHANGE(1))

Properties

Operating systems: Any
Tags: ibm-zpassword-policy
Reference: CIS IBM z/OS with RACF Benchmark v1.0.0 - 1.1.4 Ensure that the SETROPTS PASSWORD(MINCHANGE) value is set to a minimum of 1