Vulnerability Discussion

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.

Check

Verify Ubuntu 22.04 LTS has the "libpam-pwquality" package installed with the following command:

$ dpkg -l | grep libpam-pwquality
ii libpam-pwquality:amd64 1.4.4-1build2 amd64 PAM module to check password strength

If "libpam-pwquality" is not installed, this is a finding.

Fix

Install the "pam_pwquality" package by using the following command:

$ sudo apt-get install libpam-pwquality