The operating system must enforce password complexity requiring that at least one lowercase character is used.

Complex passwords can reduce the likelihood of success of automated password-guessing attacks.

Check the MINLOWER setting.

# grep ^MINLOWER /etc/default/passwd

If MINLOWER is not set to one or more, this is a finding.

The root role is required.

# pfedit /etc/default/passwd 

Locate the line containing:

MINLOWER

Change the line to read:

MINLOWER=1