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Ubuntu 22.04 LTS must prohibit password reuse for a minimum of five generations.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-260568 | UBTU-22-611050 | SV-260568r954000_rule | Medium |
| Description |
|---|
| Password complexity, or strength, is a measure of the effectiveness of a password in resisting attempts at guessing and brute-force attacks. If the information system or application allows the user to consecutively reuse their password when that password has exceeded its defined lifetime, the end result is a password that is not changed as per policy requirements. |
| STIG | Date |
|---|---|
| Canonical Ubuntu 22.04 LTS Security Technical Implementation Guide | 2024-03-21 |
Details
| Check Text ( C-64297r953515_chk ) |
|---|
| Verify Ubuntu 22.04 LTS prevents passwords from being reused for a minimum of five generations by using the following command: $ grep -i remember /etc/pam.d/common-password password [success=1 default=ignore] pam_unix.so obscure sha512 shadow remember=5 rounds=5000 If "remember" is not greater than or equal to "5", is commented out, or is missing, this is a finding. |
| Fix Text (F-64205r953516_fix) |
|---|
| Configure Ubuntu 22.04 LTS to prevent passwords from being reused for a minimum of five generations. Add or modify the following line in the "/etc/pam.d/common-password" file: password [success=1 default=ignore] pam_unix.so obscure sha512 shadow remember=5 rounds=5000 |