The system must disable accounts after three consecutive unsuccessful login attempts.

From AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE

Associated with IA controls: ECLO-1, ECLO-2

Associated with: CCI-000044

SV-38671r1_rule The system must disable accounts after three consecutive unsuccessful login attempts.

Vulnerability discussion

Disabling accounts after a limited number of unsuccessful login attempts improves protection against password guessing attacks.

Check content

# /usr/sbin/lsuser -a loginretries ALL | more Check all active accounts on the system for the maximum number of tries before the system will lock the account. If a user has values set to 0 or greater then 3, this is a finding.

Fix text

Use the chsec command to configure the number of unsuccessful logins resulting in account lockout. # chsec -f /etc/security/user -s default -a loginretries=3 # chsec -f /etc/security/user -s -a loginretries=3

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