Ubuntu 24.04 LTS 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-270706 | UBTU-24-300017 | SV-270706r1068361_rule | Low |
| Description |
| 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. |
| STIG | Date |
| Canonical Ubuntu 24.04 LTS Security Technical Implementation Guide | 2025-05-16 |
Details
| Check Text (C-74739r1067170_chk) |
| 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 (F-74640r1066606_fix) |
| 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 |