UBTU-18-010116 - The Ubuntu Operating system must be configured so that when passwords are changed or new passwords are established, pwquality must be used.


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. 'pwquality' enforces complex password construction configuration and has the ability to limit brute-force attacks on the system.


Configure the operating system to use 'pwquality' to enforce password complexity rules.

Install the pam_pwquality package by using the following command:

# apt-get install libpam-pwquality -y

Add the following line to '/etc/security/pwquality.conf' (or modify the line to have the required value):

enforcing = 1

Add the following line to '/etc/pam.d/common-password' (or modify the line to have the required value):

password requisite pam_pwquality.so retry=3 enforce_for_root

Note: The value of 'retry' should be between '1' and '3'.

See Also


Item Details

References: CAT|II, CCI|CCI-000366, Rule-ID|SV-219186r610963_rule, STIG-ID|UBTU-18-010116, STIG-Legacy|SV-109703, STIG-Legacy|V-100599, Vuln-ID|V-219186

Plugin: Unix

Control ID: 3ffc0cd650aa612b5f0a58b3e64679f532d3a48135f737d2a3f3fff2febac8b8