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The Ubuntu operating system must enforce a delay of at least 4 seconds between logon prompts following a failed logon attempt.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-238237 | UBTU-20-010075 | SV-238237r653886_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. |
| STIG | Date |
|---|---|
| Canonical Ubuntu 20.04 LTS Security Technical Implementation Guide | 2021-11-19 |
Details
| Check Text ( C-41447r653884_chk ) |
|---|
| Verify the Ubuntu operating system enforces a delay of at least 4 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 line is not present or is commented out, this is a finding. |
| Fix Text (F-41406r653885_fix) |
|---|
| 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 |