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RHEL 9 must enforce a delay of at least four seconds between logon prompts following a failed logon attempt.


Overview

Finding ID Version Rule ID IA Controls Severity
V-258071 RHEL-09-412050 SV-258071r991588_rule Medium
Description
Increasing the time between a failed authentication attempt and reprompting to enter credentials helps to slow a single-threaded brute force attack.
STIG Date
Red Hat Enterprise Linux 9 Security Technical Implementation Guide 2024-06-04

Details

Check Text ( C-61812r926198_chk )
Verify RHEL 9 enforces a delay of at least four seconds between console logon prompts following a failed logon attempt with the following command:

$ grep -i fail_delay /etc/login.defs

FAIL_DELAY 4

If the value of "FAIL_DELAY" is not set to "4" or greater, or the line is commented out, this is a finding.
Fix Text (F-61736r926199_fix)
Configure the RHEL 9 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