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AIX must enforce password complexity by requiring that at least one upper-case character be used.


Overview

Finding ID Version Rule ID IA Controls Severity
V-215217 AIX7-00-001120 SV-215217r508663_rule High
Description
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.
STIG Date
IBM AIX 7.x Security Technical Implementation Guide 2020-09-11

Details

Check Text ( C-16415r294102_chk )
From the command prompt, run the following command to check the system default "minupperalpha" attribute value:
# lssec -f /etc/security/user -s default -a minupperalpha

The above command should yield the following output:
default minupperalpha=1

If the default "minupperalpha" 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 "minupperalpha" attribute value for all accounts:
# lsuser -a minupperalpha ALL

The above command should yield the following output:
root minupperalpha=2
user2 minupperalpha=2
user3 minupperalpha=1

If any user's "minupperalpha" value is less than "1", this is a finding.
Fix Text (F-16413r294103_fix)
From the command prompt, run the following command to set "minupperalpha=1" for the default stanza in "/etc/security/user":
# chsec -f /etc/security/user -s default -a minupperalpha=1

For each user who has "minupperalpha=0", set its "minupperalpha" to "1" by running the following command from command prompt:
# chsec -f /etc/security/user -s [user_name] -a minupperalpha=1