Title

IBM z/VM must enforce 24 hours/1 day as the minimum password lifetime. (Cat II impact)

Discussion

Enforcing a minimum password lifetime helps to prevent repeated password changes to defeat the password reuse or history enforcement requirement. If users are allowed to immediately and continually change their password, then the password could be repeatedly changed in a short period of time to defeat the organization's policy regarding password reuse.

Check Content

If there is no VM:Secure PASSWORD user exit in use, this is a finding. Review the VM:Secure PASSWORD user exit. If there is no code that enforces 24 hours/1 day as the minimum password lifetime, this is a finding.

Fix Text

Configure a VM:Secure PASSWORD user exit that enforces 24 hours/1 day as the minimum password lifetime. Ensure that the following Macros are updated with proper PASSWORD user exit: FORCEPWC VMXCHGPW MAINT USE00080

Additional Identifiers

Rule ID:

Vulnerability ID: IBMZ-VM-000440

Group Title:

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.