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V-219164

CAT III (Low)

The Ubuntu operating system must enforce a delay of at least 4 seconds between logon prompts following a failed logon attempt.

Rule ID

SV-219164r991588_rule

STIG

Canonical Ubuntu 18.04 LTS Security Technical Implementation Guide

Version

V2R15

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.

Check Content

Verify the Ubuntu operating system enforces a delay of at least 4 seconds between logon prompts following a failed logon attempt.

Check that the Ubuntu operating system enforces a delay of at least 4 seconds between logon prompts with the following command:

# grep pam_faildelay /etc/pam.d/common-auth

auth required pam_faildelay.so delay=4000000

If the line is not present, or is commented out, this is a finding.

Fix Text

Configure the Ubuntu operating system to enforce a delay of at least 4 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