cyberstrikeus 4.1.15 Ensure changes to system administration scope (sudoers) is collected (Scored)
Profile Applicability
- Level 2 - Server
- Level 2 - Workstation
Description
Monitor scope changes for system administrations. If the system has been properly configured to force system administrators to log in as themselves first and then use the sudo command to execute privileged commands, it is possible to monitor changes in scope. The file /etc/sudoers will be written to when the file or its attributes have changed. The audit records will be tagged with the identifier "scope."
Rationale
Changes in the /etc/sudoers file can indicate that an unauthorized change has been made to scope of system administrator activity.
Audit Procedure
Run the following commands:
grep scope /etc/audit/audit.rules
auditctl -l | grep scope
Expected Result
Verify output of both matches:
-w /etc/sudoers -p wa -k scope
-w /etc/sudoers.d/ -p wa -k scope
Remediation
Add the following line to the /etc/audit/audit.rules file:
-w /etc/sudoers -p wa -k scope
-w /etc/sudoers.d/ -p wa -k scope
Notes: Reloading the auditd config to set active settings may require a system reboot.
Default Value
Not configured by default.
References
- CIS Controls v6.1 - 5.4 Log Administrative User Addition And Removal
Profile
- Level 2 - Server
- Level 2 - Workstation