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The audit system must be configured to audit changes to the /etc/sudoers file.


Overview

Finding ID Version Rule ID IA Controls Severity
V-51135 OL6-00-000201 SV-65345r2_rule Low
Description
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.
STIG Date
Oracle Linux 6 Security Technical Implementation Guide 2018-11-28

Details

Check Text ( C-53537r2_chk )
To verify that auditing is configured for system administrator actions, run the following command:

$ sudo grep -w "/etc/sudoers" /etc/audit/audit.rules

If the system is configured to watch for changes to its sudoers configuration, a line should be returned (including "-p wa" indicating permissions that are watched).

If there is no output, this is a finding.
Fix Text (F-55943r1_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