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V-274157

CAT II (Medium)

Amazon Linux 2023 must maintain an account lock until the locked account is released by an administrator.

Rule ID

SV-274157r1120459_rule

STIG

Amazon Linux 2023 Security Technical Implementation Guide

Version

V1R3

CCIs

CCI-002238

Discussion

By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-forcing, is reduced. Limits are imposed by locking the account.

Check Content

Verify Amazon Linux 2023 is configured to lock an account until released by an administrator after three unsuccessful logon attempts with the command:

$ grep 'unlock_time =' /etc/security/faillock.conf
unlock_time = 0

If the "unlock_time" option is not set to "0", the line is missing, or commented out, this is a finding.

Fix Text

Configure Amazon Linux 2023 to lock an account until released by an administrator after three unsuccessful logon attempts with the command:
 
$ authselect enable-feature with-faillock 

Then edit the "/etc/security/faillock.conf" file as follows:

unlock_time = 0