The Ubuntu operating system must enforce a delay of at least 4 seconds between logon prompts following a failed logon attempt.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| low | V-238237 | SRG-OS-000480-GPOS-00226 | UBTU-20-010075 | SV-238237r991588_rule | 2025-03-03 | 2 |
| 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. |
| ℹ️ Check |
|---|
| 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 |
|---|
| 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 |