Title

The system must require passwords to contain at least one numeric character. (Cat II impact)

Discussion

To enforce the use of complex passwords, minimum numbers of characters of different classes are mandated. The use of complex passwords reduces the ability of attackers to successfully obtain valid passwords using guessing or exhaustive search techniques. Complexity requirements increase the password search space by requiring users to construct passwords from a larger character set than they may otherwise use.

Check Content

Check the MINDIGIT setting. # grep MINDIGIT /etc/default/passwd If the MINDIGIT setting is less than 1, this is a finding.

Fix Text

Edit /etc/default/passwd and set the MINDIGIT setting to 1.

Additional Identifiers

Rule ID: SV-227588r603266_rule

Vulnerability ID: V-227588

Group Title: SRG-OS-000071

Expert Comments

CCIs tied to check.

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