UBTU-18-010100 - The Ubuntu operating system must enforce password complexity by requiring that at least one upper-case character be used.

Information

Use of a complex password helps to increase the time and resources required to compromise the password. Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks.

Password complexity is one factor of several that determines how long it takes to crack a password. The more complex the password, the greater the number of possible combinations that need to be tested before the password is compromised.

Solution

Add or update the '/etc/security/pwquality.conf' file to contain the 'ucredit' parameter:

ucredit=-1

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_CAN_Ubuntu_18-04_LTS_V2R15_STIG.zip

Item Details

Category: IDENTIFICATION AND AUTHENTICATION

References: 800-53|IA-5(1)(a), CAT|III, CCI|CCI-000192, Rule-ID|SV-219172r982195_rule, STIG-ID|UBTU-18-010100, STIG-Legacy|SV-109675, STIG-Legacy|V-100571, Vuln-ID|V-219172

Plugin: Unix

Control ID: bf83a13dc7a074de0929a888b9cbb4e3c657c14da50981fa5fce3163d504940e