STIGQter: STIG Summary: Amazon Linux 2023 Security Technical Implementation Guide Version: 1 Release: 4 Benchmark Date: 01 Jul 2026:

Amazon Linux 2023 must automatically lock an account until the locked account is released by an administrator when three unsuccessful logon attempts in 15 minutes occur.

DISA Rule

SV-274156r1184029_rule

Vulnerability Number

V-274156

Group Title

SRG-OS-000329-GPOS-00128

Rule Version

AZLX-23-002465

Severity

CAT II

CCI(s)

CCI-002238 - Automatically lock the account or node for either an organization-defined time period, until the locked account or node is released by an administrator, or delays the next logon prompt according to the organization-defined delay algorithm when the maximum number of unsuccessful logon attempts is exceeded.

Weight

Fix Recommendation

Configure Amazon Linux 2023 to automatically lock an account after three unsuccessful logon attempts in 15-minutes.

First, ensure that the system is configured with authselect, i.e., using sssd profiles:

$ sudo authselect select sssd [--force]

Then, enable the faillock feature:

$ sudo authselect enable-feature with-faillock

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

fail_interval = 900

Check Contents

Verify Amazon Linux 2023 locks an account after three unsuccessful logon attempts within a 15-minute period with the following command:

$ grep fail_interval /etc/security/faillock.conf
fail_interval = 900

If the "fail_interval" option is not set to "900" or less (but not "0"), the line is commented out, or the line is missing, this is a finding.

Vulnerability Number

V-274156

Documentable

False

Rule Version

AZLX-23-002465

Severity Override Guidance

Check Content Reference

Target Key

5700