Common Controls Hub
The audit system must be configured to audit changes to the /etc/sudoers file.
The actions taken by system administrators should be audited to keep a record of what was executed on the system, as well as, for accountability purposes.
Red Hat Enterprise Linux 6 Security Technical Implementation Guide
Check Text ( C-46136r1_chk )
To verify that auditing is configured for system administrator actions, run the following command:
# auditctl -l | grep "watch=/etc/sudoers"
If there is no output, this is a finding.
Fix Text (F-43526r1_fix)
At a minimum, the audit system should collect administrator actions for all users and root. Add the following to "/etc/audit/audit.rules":
-w /etc/sudoers -p wa -k actions