AIX must enforce password complexity by requiring that at least one lower-case character be used. (Cat I impact)
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.
From the command prompt, run the following command to check the system default "minloweralpha" attribute value: # lssec -f /etc/security/user -s default -a minloweralpha default minloweralpha=1 If the "default minloweralpha" value is not set, or its value is less than "1", this is a finding. From the command prompt, run the following command to check "minloweralpha" attribute value for all accounts: # lsuser -a minloweralpha ALL root minloweralpha=1 user2 minloweralpha=2 user3 minloweralpha=1 If any user's "minloweralpha" value is less than "1", this is a finding.
From the command prompt, run the following command to set "minloweralpha=1" for the default stanza in "/etc/security/user": # chsec -f /etc/security/user -s default -a minloweralpha=1 For each user who has "minloweralpha=0" set its "minloweralpha" to "1" by running the following command from command prompt: # chsec -f /etc/security/user -s [user_name] -a minloweralpha=1
Rule ID: SV-215218r508663_rule
Vulnerability ID: V-215218
Group Title: SRG-OS-000070-GPOS-00038
The information system enforces password complexity by the minimum number of lower case characters used.