When passwords are changed or new passwords are established, the new password must contain at least one lower-case character.

From Red Hat Enterprise Linux 7 Security Technical Implementation Guide

Associated with: CCI-000193

SV-86529r4_rule When passwords are changed or new passwords are established, the new password must contain at least one lower-case character.

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.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.

Check content

Note: The value to require a number of lower-case characters to be set is expressed as a negative number in "/etc/security/pwquality.conf". Check the value for "lcredit" in "/etc/security/pwquality.conf" with the following command: # grep lcredit /etc/security/pwquality.conf lcredit = -1 If the value of "lcredit" is not set to a negative value, this is a finding.

Fix text

Configure the system to require at least one lower-case character when creating or changing a password. Add or modify the following line in "/etc/security/pwquality.conf": lcredit = -1

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