Ubuntu 24.04 LTS must store only encrypted representations of passwords.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-270725 | SRG-OS-000073-GPOS-00041 | UBTU-24-400220 | SV-270725r1066664_rule | 2025-02-18 | 1 |
| 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 per policy requirements. |
| ℹ️ Check |
|---|
| Verify the Ubuntu operating system stores only encrypted representations of passwords with the following command: $ grep pam_unix.so /etc/pam.d/common-password password [success=1 default=ignore] pam_unix.so obscure sha512 shadow remember=5 rounds=100000 If the "sha512" parameter value is missing from the "pam_unix.so" line, this is a finding. |
| ✔️ Fix |
|---|
| Configure Ubuntu 24.04 LTS to store encrypted representations of passwords. Add or modify the "sha512" parameter value to the following line in "/etc/pam.d/common-password" file: password [success=1 default=ignore] pam_unix.so obscure sha512 shadow remember=5 rounds=100000 |