Vulnerability Discussion

The macOS must be configured to require at least one numeric character be
used when a password is created.

This rule enforces password complexity by requiring users to set passwords that are less vulnerable to
malicious users.

Note: The guidance for password-based authentication in NIST 800-53 (Rev 5) and NIST 800-63B state that
complexity rules should be organizationally defined. The values defined are based on common complexity
values, but an organization may define its own password complexity rules.

Check

Verify the macOS system is configured to require passwords contain a minimum of one
numeric character with the following command:

/usr/bin/pwpolicy -getaccountpolicies 2> /dev/null | /usr/bin/tail +2 | /usr/bin/xmllint --xpath
'//dict/key[text()="policyIdentifier"]/following-sibling::*[1]/text()' - | /usr/bin/grep
"requireAlphanumeric" -c

If the result is not "1", this is a finding.

Fix

Configure the macOS system to require passwords contain a minimum of
one numeric character by installing the "com.apple.mobiledevice.passwordpolicy" configuration profile.