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V-270706

CAT III (Low)

Ubuntu 24.04 LTS must enforce a delay of at least four seconds between logon prompts following a failed logon attempt.

Rule ID

SV-270706r1068361_rule

STIG

Canonical Ubuntu 24.04 LTS Security Technical Implementation Guide

Version

V1R5

CCIs

CCI-000366

Discussion

Limiting the number of logon attempts over a certain time interval reduces the chances that an unauthorized user may gain access to an account. The delay option is set in microseconds.

Check Content

Verify Ubuntu 24.04 LTS enforces a delay of at least four seconds between logon prompts following a failed logon attempt with the following command: 
 
$ grep pam_faildelay /etc/pam.d/common-auth
auth    required    pam_faildelay.so    delay=4000000
 
If the value for "delay" is not set to "4000000" or greater, the line is commented out, or is missing, this is a finding.

Fix Text

Configure Ubuntu 24.04 LTS to enforce a delay of at least four seconds between logon prompts following a failed logon attempt. 
 
Edit the file "/etc/pam.d/common-auth" and set the parameter "pam_faildelay" to a value of "4000000" or greater: 
 
auth    required    pam_faildelay.so    delay=4000000