Check: UBTU-20-010057
Canonical Ubuntu 20.04 LTS STIG:
UBTU-20-010057
(in versions v1 r12 through v1 r1)
Title
The Ubuntu operating system must be configured so that when passwords are changed or new passwords are established, pwquality must be used. (Cat II impact)
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 Content
Verify the Ubuntu operating system has the "libpam-pwquality" package installed by running the following command: $ dpkg -l libpam-pwquality ii libpam-pwquality:amd64 1.4.0-2 amd64 PAM module to check password strength If "libpam-pwquality" is not installed, this is a finding. Verify that the operating system uses "pwquality" to enforce the password complexity rules. Verify the pwquality module is being enforced by the Ubuntu operating system by running the following command: $ grep -i enforcing /etc/security/pwquality.conf enforcing = 1 If the value of "enforcing" is not "1" or the line is commented out, this is a finding. Check for the use of "pwquality" with the following command: $ cat /etc/pam.d/common-password | grep requisite | grep pam_pwquality password requisite pam_pwquality.so retry=3 If no output is returned or the line is commented out, this is a finding. If the value of "retry" is set to "0" or greater than "3", this is a finding.
Fix Text
Configure the operating system to use "pwquality" to enforce password complexity rules. Install the "pam_pwquality" package by using the following command: $ sudo 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 Note: The value of "retry" should be between "1" and "3".
Additional Identifiers
Rule ID: SV-238228r653859_rule
Vulnerability ID: V-238228
Group Title: SRG-OS-000480-GPOS-00225
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000366 |
The organization implements the security configuration settings. |
Controls
Number | Title |
---|---|
CM-6 |
Configuration Settings |