OL 9 must restrict the use of the su command.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-271723 | OL09-00-002361 | SV-271723r1091881_rule | Medium |
| Description |
| The su program allows to run commands with a substitute user and group ID. It is commonly used to run commands as the root user. Limiting access to such commands is considered a good security practice. |
| STIG | Date |
| Oracle Linux 9 Security Technical Implementation Guide | 2025-05-08 |
Details
| Check Text (C-75773r1091879_chk) |
| Verify that OL 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-75680r1091880_fix) |
| Configure OL 9 to require users to be in the "wheel" group to run su command. In file "/etc/pam.d/su", uncomment the following line: "#auth required pam_wheel.so use_uid" Or use the following command to update /etc/pam.d/su $ sed '/^[[:space:]]*#[[:space:]]*auth[[:space:]]\+required[[:space:]]\+pam_wheel\.so[[:space:]]\+use_uid$/s/^[[:space:]]*#//' -i /etc/pam.d/su If necessary, create a "wheel" group and add administrative users to the group. $ grep wheel /etc/group |