AlmaLinux OS 9 must restrict the use of the "su" command.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-269363 | ALMA-09-032470 | SV-269363r1050246_rule | Medium |
| Description |
| The "su" program provides a "switch user" capability. It is commonly used to become root but can be used to switch to any user. Limiting access to such commands is considered a good security practice. Satisfies: SRG-OS-000109-GPOS-00056, SRG-OS-000312-GPOS-00124, SRG-OS-000312-GPOS-00122, SRG-OS-000312-GPOS-00123 |
| STIG | Date |
| CloudLinux AlmaLinux OS 9 Security Technical Implementation Guide | 2025-05-22 |
Details
| Check Text (C-73394r1049553_chk) |
| Verify that AlmaLinux OS 9 requires uses to be members of the "wheel" group with the following command: $ grep pam_wheel /etc/pam.d/su auth required pam_wheel.so use_uid If a line for "pam_wheel.so" does not exist, or is commented out, this is a finding. |
| Fix Text (F-73295r1049554_fix) |
| Configure AlmaLinux OS 9 to require users to be in the "wheel" group to run "su" command. In the "/etc/pam.d/su" file, uncomment the "pam_wheel.so" line as per the instructions in the file: # Uncomment the following line to require a user to be in the "wheel" group. #auth required pam_wheel.so use_uid If necessary, create a "wheel" group and add administrative users to the group. |