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UBTU-22-412010 Ubuntu 22.04 LTS must enforce a delay of at least four seconds between logon prompts following a failed logon attempt.

DISA STIG library V2R10
All changes in this version
first version loaded CAT III

Maps to CM-6 via CCI-000366

Title

Ubuntu 22.04 LTS must enforce a delay of at least four seconds between logon prompts following a failed logon attempt.

Control

Verify Ubuntu 22.04 LTS enforces a delay of at least four seconds between logon prompts following a failed logon attempt by using the following command: $ grep pam_faildelay /etc/pam.d/common-auth auth required pam_faildelay.so delay=4000000 If "delay" is not set to "4000000" or greater, the line is commented out, or is missing, this is a finding.

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.

Related controls

CCI-000366

Fix

Configure Ubuntu 22.04 LTS to enforce a delay of at least four seconds between logon prompts following a failed logon attempt. Add or modify the following line in the "/etc/pam.d/common-auth" file: auth required pam_faildelay.so delay=4000000