AlmaLinux OS 9 must restrict the use of the "su" command.
An XCCDF Rule
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
- ID
- SV-269363r1050246_rule
- Version
- ALMA-09-032470
- Severity
- Medium
- References
- Updated
Remediation Templates
A Manual Procedure
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