STIGhubSTIGhub
STIGsRMF ControlsCompare

STIGhub

A free tool to search and browse the entire DISA STIG library. Saves up to 75% in security compliance research time.

Navigation

  • Browse STIGs
  • Search
  • RMF Controls
  • Compare Versions

Resources

  • About
  • Release Notes
  • VPAT
  • DISA STIG Library
STIGs updated 5 hours ago
Powered by Pylon
© 2026 Beacon Cloud Solutions, Inc. All rights reserved.
← Back to Canonical Ubuntu 20.04 LTS Security Technical Implementation Guide

V-238226

CAT III (Low)

The Ubuntu operating system must enforce password complexity by requiring that at least one special character be used.

Rule ID

SV-238226r1015149_rule

STIG

Canonical Ubuntu 20.04 LTS Security Technical Implementation Guide

Version

V2R4

CCIs

CCI-001619CCI-004066

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. Password complexity is one factor in determining 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. Special characters are those characters that are not alphanumeric. Examples include: ~ ! @ # $ % ^ *.

Check Content

Determine if the field "ocredit" is set in the "/etc/security/pwquality.conf" file with the following command: 
 
$ grep -i "ocredit" /etc/security/pwquality.conf  
ocredit=-1 
 
If the "ocredit" parameter is greater than "-1" or is commented out, this is a finding.

Fix Text

Configure the Ubuntu operating system to enforce password complexity by requiring that at least one special character be used.  
 
Add or update the following line in the "/etc/security/pwquality.conf" file to include the "ocredit=-1" parameter: 
 
ocredit=-1