UBTU-18-010101 - The Ubuntu operating system must enforce password complexity by requiring that at least one lower-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 'lcredit' parameter:

lcredit=-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-000193, Rule-ID|SV-219173r982196_rule, STIG-ID|UBTU-18-010101, STIG-Legacy|SV-109677, STIG-Legacy|V-100573, Vuln-ID|V-219173

Plugin: Unix

Control ID: 8890751f2d3fe8a968355159c3623496594ff2c33a32edb29f6a4b445b19b828