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V-274144

CAT II (Medium)

Amazon Linux 2023 must enforce a delay of at least four seconds between logon prompts following a failed logon attempt.

Rule ID

SV-274144r1120420_rule

STIG

Amazon Linux 2023 Security Technical Implementation Guide

Version

V1R3

CCIs

CCI-000366

Discussion

Increasing the time between a failed authentication attempt and re-prompting to enter credentials helps to slow a single-threaded brute force attack.

Check Content

Verify Amazon Linux 2023 enforces a delay of at least four seconds between console logon prompts following a failed logon attempt with the following command:

$ sudo grep -i fail_delay /etc/login.defs
FAIL_DELAY 4

If the value of "FAIL_DELAY" is not set to "4" or greater, the line is commented out, or the line is missing, this is a finding.

Fix Text

Configure Amazon Linux 2023 to enforce a delay of at least four seconds between logon prompts following a failed console logon attempt.

Modify the "/etc/login.defs" file to set the "FAIL_DELAY" parameter to "4" or greater:

FAIL_DELAY 4