The TOSS 5 /etc/shadow- file must have mode 0000 or less permissive to prevent unauthorized access.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-282650 | TOSS-05-000154 | SV-282650r1200930_rule | CCI-000366 | medium |
| Description | ||||
| The "/etc/shadow-" file is a backup file of "/etc/shadow", and as such, contains the list of local system accounts and password hashes. Protecting this file is critical for system security. | ||||
| STIG | Date | |||
| Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide | 2026-04-01 | |||
Details
Check Text (C-282650r1200930_chk)
Verify the "/etc/shadow-" file has mode "0000" using the following command:
$ sudo stat -c "%a %n" /etc/shadow-
0 /etc/shadow-
If a value of "0" is not returned, this is a finding.
Fix Text (F-87116r1200929_fix)
Change the mode of the file "/etc/shadow-" to "0000" using the following command:
$ sudo chmod 0000 /etc/shadow-