Title

The system must require passwords to contain at least one uppercase alphabetic 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 MINUPPER setting. # egrep MINUPPER /etc/default/passwd If MINUPPER is not set to 1 or more, this is a finding.

Fix Text

Edit /etc/default/passwd and set the MINUPPER setting to at least 1.

Additional Identifiers

Rule ID: SV-227587r603266_rule

Vulnerability ID: V-227587

Group Title: SRG-OS-000069

Expert Comments

CCIs tied to check.

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